Scholars@Duke
David Mitzi

David Mitzi

Simon Family Distinguished Professor
Thomas Lord Department of Mechanical Engineering and Materials Science
david.mitzi@duke.edu
363 Gross Hall, Box 90300, Durham, NC 27708
Box 90300 Hudson Hall, Durham, NC 27708-0300

Selected Publications

Remote chirality transfer in low-dimensional hybrid metal halide semiconductors.

Journal Article Nature chemistry · October 2024 In hybrid metal halide perovskites, chiroptical properties typically arise from structural symmetry breaking by incorporating a chiral A-site organic cation within the structure, which may limit the compositional space. Here we demonstrate highly efficient ... Full text Cite

Chirality and Solvent Coassist the Structural Evolution of Hybrid Manganese Chlorides with Second-Harmonic-Generation Response.

Journal Article Inorganic chemistry · September 2024 Chiral hybrid metal halides have shown great potential in optoelectronics, including for spin splitting, circularly polarized luminescence, and nonlinear-optical properties. However, despite their inherent inversion symmetry breaking, studies on second har ... Full text Cite

Local Structure in Crystalline, Glass and Melt States of a Hybrid Metal Halide Perovskite.

Journal Article Journal of the American Chemical Society · September 2024 The pursuit of structure-property relationships in crystalline metal halide perovskites (MHPs) has yielded an unprecedented combination of advantageous characteristics for wide-ranging optoelectronic applications. While crystalline MHP structures are readi ... Full text Cite

Hydrogen Bonding Analysis of Structural Transition-Induced Symmetry Breaking and Spin Splitting in a Hybrid Perovskite Employing a Synergistic Diffraction-DFT Approach.

Journal Article Journal of the American Chemical Society · August 2024 Two-dimensional (2D) hybrid organic-inorganic perovskites (HOIPs) offer an outstanding opportunity for spin-related technologies owing in part to their tunable structural symmetry breaking and distortions driven by organic-inorganic hydrogen (H) bonds. How ... Full text Cite

Homochiral and Heterochiral Cation Mixing in 2D Perovskites for Enhanced Structural Asymmetry and Spin Splitting

Journal Article ACS Materials Letters · July 1, 2024 Overcoming the constraints of single-cation phases and further enhancing structural asymmetry represent critical objectives for optimizing emergent optoelectronic and spin-related properties in two-dimensional (2D) hybrid organic-inorganic perovskites (HOI ... Full text Cite

Giant Apparent Optical Circular Dichroism in Thin Films of Bismuth-Based Hybrid Organic–Inorganic Metal Halide Semiconductor Through Preferred Orientation

Journal Article Advanced Optical Materials · May 6, 2024 Introducing chirality into organic/inorganic hybrid materials can impart chiroptical properties such as circular dichroism. The ability to tune chiroptical properties in self-assembled materials can have important implications for spintronic and optoelectr ... Full text Cite

Controlling glass forming kinetics in 2D perovskites using organic cation isomers.

Journal Article Chem Sci · May 1, 2024 The recent discovery of glass-forming metal halide perovskites (MHPs) provides opportunities to broaden the application domain beyond traditionally celebrated optoelectronic research fueled by associated crystalline counterparts. In this regard, it is cruc ... Full text Link to item Cite

Device Performance of Emerging Photovoltaic Materials (Version 4)

Journal Article Advanced Energy Materials · January 26, 2024 Following the 3rd release of the “Emerging PV reports”, the best achievements in the performance of emerging photovoltaic (e-PV) devices in diverse e-PV research subjects are summarized, as reported in peer-reviewed articles in academic journals since Augu ... Full text Cite

Exploration, Prediction, and Experimental Verification of Structure and Optoelectronic Properties in I2-Eu-IV-X4 (I = Li, Cu, Ag; IV = Si, Ge, Sn; X = S, Se) Chalcogenide Semiconductors

Journal Article Chemistry of Materials · January 9, 2024 Recently, there has been extensive research into photovoltaic, thermoelectric, and nonlinear optical applications of chalcogenide semiconductors within the large set of defect-resistant I2-II-IV-X4 (I = Li, Cu, Ag; II = Ba, Sr, Eu, Pb; IV = Si, Ge, Sn; X = ... Full text Cite

Impact of Chiral Symmetry Breaking on Spin-Texture and Lone Pair Expression in Chiral Crystals of Hybrid Antimony and Bismuth Halides

Journal Article Chemistry of Materials · November 14, 2023 Chiral organic building blocks can be incorporated into hybrid organic-inorganic metal-halide crystalline semiconductors so as to control and impact the interconversion between light, charge, and spin. Here, we report a series of hybrid antimony and bismut ... Full text Cite

Ultrafast microscopy and image segmentation of spatially heterogeneous excited state and trap passivation in Cu2BaSnSSe3

Journal Article Cell Reports Physical Science · October 18, 2023 Earth-abundant Cu2BaSnS4-xSex (CBTSSe) represents a recent alternative for Cu2ZnSn(S,Se)4 for solar energy conversion with a lower level of disorder and band tailing. We report the heterogeneous excited-state and trap-state pattern in different solution-pr ... Full text Cite

Meltable Hybrid Antimony and Bismuth Iodide One-Dimensional Perovskites.

Journal Article Inorganic chemistry · October 2023 Hybrid lead-halide perovskites have been studied extensively for their promising optoelectronic properties and prospective applications, including photovoltaics, solid-state lighting, and radiation detection. Research into these materials has also been aid ... Full text Cite

Chiral Cation Doping for Modulating Structural Symmetry of 2D Perovskites.

Journal Article J Am Chem Soc · August 16, 2023 Cation mixing in two-dimensional (2D) hybrid organic-inorganic perovskite (HOIP) structures represents an important degree of freedom for modifying organic templating effects and tailoring inorganic structures. However, the limited number of known cation-m ... Full text Open Access Link to item Cite

Study of Glass Formation and Crystallization Kinetics in a 2D Metal Halide Perovskite Using Ultrafast Calorimetry.

Journal Article Journal of the American Chemical Society · August 2023 While crystalline 2D metal halide perovskites (MHPs) represent a well-celebrated semiconductor class, supporting applications in the fields of photovoltaics, emitters, and sensors, the recent discovery of glass formation in an MHP opens many new opportunit ... Full text Cite

Structure and electronic tunability of acene alkylamine based layered hybrid organic-inorganic perovskites from first principles

Journal Article Physical Review Materials · August 1, 2023 Twelve layered hybrid organic-inorganic perovskites combining oligoacene derivatives [phenylmethylammonium (PMA), naphthylmethylammonium (NMA), anthrylmethylammonium (AMA), and tetrylmethylammonium (TMA)] and lead halides (Cl-, Br-, and I- anions) are inve ... Full text Cite

Alkali element (Li, Na, K, and Rb) doping of Cu2BaGe1−xSnxSe4 films

Journal Article Journal of Materials Chemistry A · June 7, 2023 Cu2BaGe1−xSnxSe4 (CBGTSe) represents an exemplary system within the I2-II-IV-X4 (I = Ag, Cu; II = Sr, Ba; IV = Ge, Sn; X = S, Se) family, which has been introduced to target suppressing the formation of anti-site defects and associated defect clusters with ... Full text Cite

A two-dimensional lead-free hybrid perovskite semiconductor with reduced melting temperature.

Journal Article Chemical communications (Cambridge, England) · June 2023 1-Methylhexylammonium tin iodide yields the lowest reported melting temperature (Tm = 142 °C) to date among lead-free hybrid perovskite semiconductors. Molecular branching near the organic ammonium group coupled with tuning of metal/halog ... Full text Cite

Coherent Phonon-Induced Modulation of Charge Transfer in 2D Hybrid Perovskites

Journal Article Advanced Functional Materials · May 17, 2023 Electron–phonon interactions play an essential role in charge transport and transfer processes in semiconductors. For most structures, tailoring electron–phonon interactions for specific functionality remains elusive. Here, it is shown that, in hybrid pero ... Full text Cite

Ag Alloying in Cu2−yAgyBa(Ge,Sn)Se4 Films and Photovoltaic Devices

Journal Article Solar RRL · April 1, 2023 Trigonal Cu2BaGe1−xSnxSe4 (CBGTSe) has recently gained interest as a potential photovoltaic absorber to target mitigation of antisite defect formation in Cu2ZnSn(S,Se)4. This study examines partial substitution of Cu by Ag as a potential approach to tune t ... Full text Cite

Phase Stability, Band Gap Tuning, and Rashba Splitting in Selenium-Alloyed Bournonite: CuPbSb(S1−xSex)3

Journal Article Chemistry of Materials · January 24, 2023 Recently, bournonite (CuPbSbS3) has been identified as a potential ferroelectric photovoltaic (PV) material with a 1.3 eV band gap, which falls in an appropriate range for single-junction PV devices. Progress in applying bournonite has yielded several stud ... Full text Cite

Device Performance of Emerging Photovoltaic Materials (Version 3)

Journal Article Advanced Energy Materials · January 6, 2023 Following the 2nd release of the “Emerging PV reports,” the best achievements in the performance of emerging photovoltaic devices in diverse emerging photovoltaic research subjects are summarized, as reported in peer-reviewed articles in academic journals ... Full text Cite

Top Stack Optimization for Cu2BaSn(S, Se)4 Photovoltaic Cell Leads to Improved Device Power Conversion Efficiency beyond 6%

Journal Article Advanced Energy Materials · October 27, 2022 Earth-abundant and air-stable Cu2BaSnS4−xSex (CBTSSe) and related thin-film absorbers are regarded as prospective options to meet the increasing demand for low-cost solar cell deployment. Devices based on vacuum-deposited CBTSSe absorbers have achieved rec ... Full text Cite

Spiers Memorial Lecture: Next generation chalcogenide-based absorbers for thin-film solar cells.

Journal Article Faraday discussions · October 2022 Inorganic-based thin-film photovoltaics (TFPV) represents an important component of the growing low-carbon energy market and plays a vital role in the drive toward lower cost and increased penetration of solar energy. Yet, commercialized thin-film absorber ... Full text Cite

Indium-free CIGS analogues: general discussion.

Journal Article Faraday discussions · October 2022 Full text Cite

Influence of Copper Composition on Cu2BaSn(S,Se)4Solution-Deposited Films and Photovoltaic Devices with over 5% Efficiency

Journal Article ACS Applied Energy Materials · September 26, 2022 Cu2BaSn(S,Se)4is currently in the spotlight for prospective environmentally friendly, stable, thin-film solar cell application, with demonstrated device power conversion efficiency (PCE) exceeding 5% for vacuum-deposited absorbers. As suggested by first-pr ... Full text Cite

Crystallization Kinetics in a Glass-Forming Hybrid Metal Halide Perovskite

Journal Article ACS Materials Letters · September 5, 2022 The recent discovery of glass-forming hybrid metal halide perovskite (MHP) semiconductors has opened the opportunity to explore their utility beyond the already celebrated fields of photovoltaics and light emitters, as enabled by their crystalline counterp ... Full text Cite

Kinetically Controlled Structural Transitions in Layered Halide-Based Perovskites: An Approach to Modulate Spin Splitting.

Journal Article Journal of the American Chemical Society · August 2022 Two-dimensional hybrid organic-inorganic perovskite (HOIP) semiconductors with pronounced spin splitting, mediated by strong spin-orbit coupling and inversion symmetry breaking, offer the potential for spin manipulation in future spintronic applications. H ... Full text Cite

Impact of Structural Distortions on the Optoelectronic and Spin-Related Properties of Two-Dimensional Hybrid Perovskites

Chapter · March 1, 2022 In summary, an interplay of charge-density (electrostatic) requirements, steric factors, and hydrogen bonding interactions induces detailed structural distortions in 2D perovskites, the nature and degree of which are specific to the cation and inorganic fr ... Full text Cite

Cubic Crystal Structure Formation and Optical Properties within the Ag-BII-MIV-X (BII = Sr, Pb; MIV = Si, Ge, Sn; X = S, Se) Family of Semiconductors.

Journal Article Inorganic chemistry · February 2022 Quaternary chalcogenide semiconductors are promising materials for energy conversion and nonlinear optical applications, with properties tunable primarily by varying the elemental composition and crystal structure. Here, we first analyze the connections am ... Full text Cite

Device Performance of Emerging Photovoltaic Materials (Version 2)

Journal Article Advanced Energy Materials · December 1, 2021 Following the 1st release of the “Emerging photovoltaic (PV) reports”, the best achievements in the performance of emerging photovoltaic devices in diverse emerging photovoltaic research subjects are summarized, as reported in peer-reviewed articles in aca ... Full text Cite

Optoelectronic property comparison for isostructural Cu2BaGeSe4and Cu2BaSnS4solar absorbers

Journal Article Journal of Materials Chemistry A · November 7, 2021 To target mitigation of anti-site defect formation in Cu2ZnSnS4−xSex, a new class of chalcogenides, for which Ba or Sr (group 2) replace Zn (group 12), has recently been introduced for prospective solar absorber application. Cu2BaGeSe4(CBGSe) and Cu2BaSnS4 ... Full text Cite

Alkyl-Aryl Cation Mixing in Chiral 2D Perovskites.

Journal Article Journal of the American Chemical Society · November 2021 We report 2D hybrid perovskites comprising a blend of chiral arylammonium and achiral alkylammonium spacer cations (1:1 mole ratio). These new perovskites feature an unprecedented combination of chirality and alkyl-aryl functionality alongside noncovalent ... Full text Cite

Photoluminescence study of solution-deposited Cu2BaSnS4thin films

Journal Article APL Materials · November 1, 2021 To experimentally identify the character of radiative transitions in trigonal Cu2BaSnS4, we conduct temperature and excitation intensity dependent photoluminescence (PL) measurements in the temperature range of 15-300 K. The low-temperature near band edge ... Full text Cite

Growth and Photovoltaic Device Application of Cu2BaGe1- xSnxSe4Films Prepared by Selenization of Sequentially Deposited Precursors

Journal Article ACS Applied Energy Materials · October 25, 2021 Toward suppressing the formation of anti-site defects and related defect clusters in kesterite Cu2ZnSnS4-xSex (CZTS) absorber films, Cu2-II-IV-X4 (II = Sr, Ba; IV = Ge, Sn; X = S, Se) compounds have recently been introduced. Cu2BaGe1-xSnxSe4 (CBGTSe) is on ... Full text Cite

Structural, Optical, and Electronic Properties of Two Quaternary Chalcogenide Semiconductors: Ag2SrSiS4 and Ag2SrGeS4.

Journal Article Inorganic chemistry · August 2021 Quaternary chalcogenide materials have long been a source of semiconductors for optoelectronic applications. Recent studies on I2-II-IV-X4 (I = Ag, Cu, Li; II = Ba, Sr, Eu, Pb; IV = Si, Ge, Sn; X = S, Se) materials have shown particul ... Full text Cite

Structural descriptor for enhanced spin-splitting in 2D hybrid perovskites.

Journal Article Nature communications · August 2021 Two-dimensional (2D) hybrid metal halide perovskites have emerged as outstanding optoelectronic materials and are potential hosts of Rashba/Dresselhaus spin-splitting for spin-selective transport and spin-orbitronics. However, a quantitative microscopic un ... Full text Cite

Electrical doping in halide perovskites

Journal Article Nature Reviews Materials · June 1, 2021 Electrical doping (that is, intentional engineering of carrier density) underlies most energy-related and optoelectronic semiconductor technologies. However, for the intensely studied halide perovskite family of semiconductors, reliable doping remains chal ... Full text Cite

P-Type molecular doping by charge transfer in halide perovskite

Journal Article Materials Advances · May 7, 2021 Electronic technologies critically rely on the ability to broadly dope the active semiconductor; yet the promising class of halide perovskite semiconductors so far does not allow for significant control over carrier type (p- or n-) and density. The molecul ... Full text Cite

Remarkably Weak Anisotropy in Thermal Conductivity of Two-Dimensional Hybrid Perovskite Butylammonium Lead Iodide Crystals.

Journal Article Nano letters · May 2021 Two-dimensional (2D) hybrid organic-inorganic perovskites consisting of alternating organic and inorganic layers are a new class of layered structures. They have attracted increasing interest for photovoltaic, optoelectronic, and thermoelectric application ... Full text Cite

Device Performance of Emerging Photovoltaic Materials (Version 1)

Journal Article Advanced Energy Materials · March 1, 2021 Emerging photovoltaics (PVs) focus on a variety of applications complementing large scale electricity generation. Organic, dye-sensitized, and some perovskite solar cells are considered in building integration, greenhouses, wearable, and indoor application ... Full text Cite

Mechanism of Additive-Assisted Room-Temperature Processing of Metal Halide Perovskite Thin Films.

Journal Article ACS applied materials & interfaces · March 2021 Perovskite solar cells have received substantial attention due to their potential for low-cost photovoltaic devices on flexible or rigid substrates. Thiocyanate (SCN)-containing additives, such as MASCN (MA = methylammonium), have been shown to control per ... Full text Cite

Optoelectronic and material properties of solution-processed Earth-abundant Cu2BaSn(S, Se)4 films for solar cell applications

Journal Article Nano Energy · February 1, 2021 Copper barium thioselenostannate, Cu2BaSnS4−xSex (CBTSSe), absorbers employ low-toxicity and abundant metals while offering low-cost manufacturing options, controllable stoichiometry and band gap tunability (from 2 eV at x = 0 to 1.55 eV at x = 3). CBTSSe ... Full text Cite

Porous Cu2BaSn(S,Se)4Film as a Photocathode Using Non-Toxic Solvent and a Ball-Milling Approach

Journal Article ACS Applied Energy Materials · January 25, 2021 Cu2BaSn(S,Se)4 (CBTSSe) has been proposed as an alternative to Cu2ZnSn(S,Se)4 (CZTSSe) for solar absorbers due to its reduced propensity for antisite disorder and band tailing while maintaining the desirable characteristics of band gap tunability, earth-ab ... Full text Cite

Reversible Crystal-Glass Transition in a Metal Halide Perovskite.

Journal Article Advanced materials (Deerfield Beach, Fla.) · January 2021 Crystalline metal halide perovskites (MHPs) have provided unprecedented advances in interdisciplinary fields of materials, electronics, and photonics. While crystallinity offers numerous advantages, the ability to access a glassy state with distinct proper ... Full text Cite

Halide Perovskite Materials, Structural Dimensionality, and Synthesis

Chapter · January 1, 2021 In this chapter, we provide an overview of the halide perovskite family, with several examples of low-dimensional perovskites and associated preparation methods. A wide range of synthetic techniques applied to halide perovskite compounds are described, and ... Full text Cite

Bifacial perovskite solar cells via a rapid lamination process

Journal Article ACS Applied Energy Materials · October 26, 2020 Hybrid perovskite solar cells are considered a promising choice for next-generation thin-film photovoltaic technology. To meet commercialization requirements, more research efforts have now been focused on developing potentially high throughput fabrication ... Full text Cite

Organic-to-inorganic structural chirality transfer in a 2D hybrid perovskite and impact on Rashba-Dresselhaus spin-orbit coupling.

Journal Article Nature communications · September 2020 Translation of chirality and asymmetry across structural motifs and length scales plays a fundamental role in nature, enabling unique functionalities in contexts ranging from biological systems to synthetic materials. Here, we introduce a structural chiral ... Full text Cite

Electronic structure and photophysics of a supermolecular iron complex having a long MLCT-state lifetime and panchromatic absorption.

Journal Article Proceedings of the National Academy of Sciences of the United States of America · August 2020 Exploiting earth-abundant iron-based metal complexes as high-performance photosensitizers demands long-lived electronically excited metal-to-ligand charge-transfer (MLCT) states, but these species suffer typically from femtosecond timescale charge-transfer ... Full text Cite

Erratum: Structural tolerance factor approach to defect-resistant I2‑II-IV‑X4 semiconductor design (Chemistry of Materials (2020) 32:4 (1636-1649) DOI: 10.1021/acs.chemmater.9b05107)

Journal Article Chemistry of Materials · July 14, 2020 In our original manuscript, the energy band structure of Ag2PbSiS4 in the Ama2 structure, shown in Figure 11d and calculated at the level of the hybrid density functional HSE06, was mistakenly calculated without including the effects of spin- orbit couplin ... Full text Cite

Highly Distorted Chiral Two-Dimensional Tin Iodide Perovskites for Spin Polarized Charge Transport.

Journal Article Journal of the American Chemical Society · July 2020 Incorporating chiral organic molecules into organic/inorganic hybrid 2D metal-halide perovskites results in a novel family of chiral hybrid semiconductors with unique spin-dependent properties. The embedded chiral organic moieties induce a chiroptical resp ... Full text Cite

High-temperature decomposition of Cu2BaSnS4with Sn loss reveals newly identified compound Cu2Ba3Sn2S8

Journal Article Journal of Materials Chemistry A · June 14, 2020 The earth-abundant quaternary compound Cu2BaSnS4is being currently studied as a candidate for photovoltaics and as a photocathode for water splitting. However, the chemical stability of this phase during synthesis is unclear. The synthesis of other quatern ... Full text Cite

Carrier-Resolved Photo-Hall Effect: Unlocking a 140-year-old secret in Hall effect

Conference Conference Record of the IEEE Photovoltaic Specialists Conference · June 14, 2020 Majority and minority carrier properties such as type, density and mobility represent fundamental yet difficult to access parameters governing semiconductor device performance, most notably solar cells. Obtaining this information simultaneously under light ... Full text Cite

High-Quality MAPbBr3 Cuboid Film with Promising Optoelectronic Properties Prepared by a Hot Methylamine Precursor Approach.

Journal Article ACS applied materials & interfaces · May 2020 Though CH3NH3PbBr3 single crystals are frequently applied in various optoelectronic devices due to their favorable cuboid geometry, superior optoelectronic properties, and better stability than CH3NH3P ... Full text Cite

Structural Tolerance Factor Approach to Defect-Resistant I2-II-IV-X4 Semiconductor Design

Journal Article Chemistry of Materials · February 25, 2020 Recent work on quaternary semiconductors Cu2BaSn(S,Se)4 and Ag2BaSnSe4 for photovoltaic and thermoelectric applications, respectively, has shown the promise of exploring the broader family of defect-resistant I2-II-IV-X4 materials (where I, II, and IV refe ... Full text Open Access Cite

Is Cs2TiBr6 a promising Pb-free perovskite for solar energy applications?

Journal Article Journal of Materials Chemistry A · February 21, 2020 In a quest for Pb-free perovskites suitable for solar energy applications, Cs2TiBr6 has recently been reported as a promising compound, with appropriate optical and electrical properties as well as high stability under environmental stresses. In this study ... Full text Cite

Origin of Broad-Band Emission and Impact of Structural Dimensionality in Tin-Alloyed Ruddlesden−Popper Hybrid Lead Iodide Perovskites

Journal Article ACS Energy Letters · February 14, 2020 Hybrid organic−inorganic lead halide perovskites have shown promising results as active layers in light-emitting diodes, typically utilizing the near-monochromatic, free exciton emission. Some perovskite compounds, however, show broad-band emission that is ... Full text Cite

Solution-based synthesis of kesterite thin film semiconductors

Journal Article JPhys Energy · January 1, 2020 Large-scale deployment of photovoltaic modules is required to power our renewable energy future. Kesterite, Cu2ZnSn(S, Se)4, is a p-type semiconductor absorber layer with a tunable bandgap consisting of earth abundant elements, and is seen as a potential ' ... Full text Cite

Impact of PbI2 Passivation and Grain Size Engineering in CH3NH3PbI3 Solar Absorbers as Revealed by Carrier-Resolved Photo-Hall Technique

Journal Article Advanced Energy Materials · December 1, 2019 With power conversion efficiencies now exceeding 25%, hybrid perovskite solar cells require deeper understanding of defects and processing to further approach the Shockley-Queisser limit. One approach for processing enhancement and defect reduction involve ... Full text Cite

Carrier-resolved photo-Hall effect.

Journal Article Nature · November 2019 The fundamental parameters of majority and minority charge carriers-including their type, density and mobility-govern the performance of semiconductor devices yet can be difficult to measure. Although the Hall measurement technique is currently the standar ... Full text Cite

Resolving rotational stacking disorder and electronic level alignment in a 2d oligothiophene-based lead iodide perovskite

Journal Article Chemistry of Materials · October 22, 2019 Two-dimensional (2D) hybrid organic-inorganic perovskites (HOIPs) represent diverse quantum well heterostructures composed of alternating inorganic and organic layers. While 2D HOIPs are nominally periodic in three dimensions for X-ray scattering, the inor ... Full text Cite

Tunable internal quantum well alignment in rationally designed oligomer-based perovskite films deposited by resonant infrared matrix-assisted pulsed laser evaporation

Journal Article Materials Horizons · October 1, 2019 Hybrid perovskites incorporating conjugated organic cations enable unusual charge carrier interactions among organic and inorganic structural components, but are difficult to prepare as films due to disparate component chemical/physical characteristics (e. ... Full text Cite

Mg Doped CuCrO2 as Efficient Hole Transport Layers for Organic and Perovskite Solar Cells.

Journal Article Nanomaterials (Basel, Switzerland) · September 2019 The electrical and optical properties of the hole transport layer (HTL) are critical for organic and halide perovskite solar cell (OSC and PSC, respectively) performance. In this work, we studied the effect of Mg doping on CuCrO2 (CCO) nanoparti ... Full text Cite

Interfacial Effects during Rapid Lamination within MAPbI3 Thin Films and Solar Cells

Journal Article ACS Applied Energy Materials · July 22, 2019 Although hybrid halide perovskite solar cells (PSCs) have recently reached record efficiency among thin film photovoltaic technologies, the stability of these devices remains a pressing problem for commercialization. Lamination processes represent an attra ... Full text Cite

Phase-Pure Hybrid Layered Lead Iodide Perovskite Films Based on a Two-Step Melt-Processing Approach

Journal Article Chemistry of Materials · June 11, 2019 Layered lead halide perovskites have recently been heavily investigated due to their versatile structures, tunable electronic properties, and better stability compared with 3D perovskites and have also been effectively incorporated into photovoltaic and li ... Full text Cite

Phase and film formation pathway for vacuum-deposited C u2BaSn(S,Se)4 absorber layers

Journal Article Physical Review Materials · May 15, 2019 Earth-abundant copper barium thioselenostannate, Cu2BaSn(S,Se)4, absorbers have recently demonstrated promising optoelectronic and defect resistance properties for solar harvesting applications. The highest photovoltaic device efficiencies have been achiev ... Full text Cite

Direct-Bandgap 2D Silver-Bismuth Iodide Double Perovskite: The Structure-Directing Influence of an Oligothiophene Spacer Cation.

Journal Article Journal of the American Chemical Society · May 2019 Three-dimensional (3D) hybrid organic-inorganic lead halide perovskites (HOIPs) feature remarkable optoelectronic properties for solar energy conversion but suffer from long-standing issues of environmental stability and lead toxicity. Associated two-dimen ... Full text Cite

Synthetic Approaches for Halide Perovskite Thin Films.

Journal Article Chemical reviews · March 2019 Halide perovskites are an intriguing class of materials that have recently attracted considerable attention for use as the active layer in thin film optoelectronic devices, including thin-film transistors, light-emitting devices, and solar cells. The "soft ... Full text Cite

Introduction: Perovskites.

Journal Article Chemical reviews · March 2019 Full text Cite

Fully Air-Bladed High-Efficiency Perovskite Photovoltaics

Journal Article Joule · February 20, 2019 Perovskite photovoltaics has achieved rapid development largely due to the spin-coating technique with antisolvent steps at laboratory scale. However, the spin-coating/antisolvent technique limits the device dimension due to film uniformity issues. Up to n ... Full text Cite

Stereochemically active lead chloride enantiomers mediated by homochiral organic cation

Journal Article Polyhedron · January 15, 2019 Two-dimensional ((S)-1-(1-naphthyl)ethylamineH)2Pb4Cl10·2DMF (1) and ((R)-1-(1-naphthyl)ethylamineH)2Pb4Cl10·2DMF (2) have been synthesized using the corresponding homochiral organic cations. The lead atoms within the structure adopt a variety of coordinat ... Full text Cite

Melting temperature suppression of layered hybrid lead halide perovskites via organic ammonium cation branching.

Journal Article Chemical science · January 2019 Hybrid organic-inorganic lead halide perovskites have attracted broad interest because of their unique optical and electronic properties, as well as good processability. Thermal properties of these materials, often overlooked, can provide additional critic ... Full text Cite

Dual-source evaporation of silver bismuth iodide films for planar junction solar cells

Journal Article Journal of Materials Chemistry A · January 1, 2019 Non-toxic and air-stable silver bismuth iodide semiconductors are promising light absorber candidates for photovoltaic applications owing to a suitable band gap for multi- or single-junction solar cells. Recently, solution-based film fabrication approaches ... Full text Cite

Photovoltaic Effect in Indium(I) Iodide Thin Films

Journal Article Chemistry of Materials · November 27, 2018 Halide semiconductors are undergoing a period of intense interest, buoyed by the outstanding optoelectronic properties of hybrid perovskites. It is worthwhile to consider whether related materials sharing unique aspects of the perovskite chemistry, such as ... Full text Cite

Grain-Resolved Ultrafast Photophysics in Cu2BaSnS4- xSe x Semiconductors Using Pump-Probe Diffuse Reflectance Spectroscopy and Microscopy.

Journal Article ACS applied materials & interfaces · November 2018 In this paper, we analyze fundamental photoexcitation processes and charge carrier kinetics in Cu2BaSnS4- xSe x (CBTSSe), a recently introduced alternative to Cu(In,Ga)(S,Se)2 and Cu2ZnSnS4- x Full text Cite

Carrier Dynamics Engineering for High-Performance Electron-Transport-Layer-free Perovskite Photovoltaics

Journal Article Chem · October 11, 2018 Electron-transport-layer-free (ETL-free) device architectures are promising designs for perovskite photovoltaics because they offer simpler configurations, low cost, and convenience for versatile optoelectronics. However, the development of ETL-free photov ... Full text Open Access Cite

Tunable Semiconductors: Control over Carrier States and Excitations in Layered Hybrid Organic-Inorganic Perovskites.

Journal Article Physical review letters · October 2018 For a class of 2D hybrid organic-inorganic perovskite semiconductors based on π-conjugated organic cations, we predict quantitatively how varying the organic and inorganic component allows control over the nature, energy, and localization of carrier states ... Full text Cite

Band Gap Tailoring and Structure-Composition Relationship within the Alloyed Semiconductor Cu2BaGe1- xSnxSe4

Journal Article Chemistry of Materials · September 25, 2018 Recently, the I2-II-IV-VI4 (I = Cu, Ag; II = Ba, Sr; IV = Ge, Sn; VI = S, Se) materials family was identified as a promising source of potential new photovoltaic (PV) and photoelectrochemical (PEC) absorbers. These materials avoid the pitfalls of the succe ... Full text Cite

Solution-Processed Earth-Abundant Cu2BaSn(S,Se)4 Solar Absorber Using a Low-Toxicity Solvent

Journal Article Chemistry of Materials · September 11, 2018 Cu2BaSn(S,Se)4 (CBTSSe) has recently gained substantial attention as an alternative absorber material for photovoltaic (PV) and photoelectrochemical (PEC) applications due to the abundance of the constituent elements, a large absorption coefficient, tunabl ... Full text Cite

How to turn iron into ruthenium

Conference ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY · August 19, 2018 Link to item Cite

Phase Stability and Electronic Structure of Prospective Sb-Based Mixed Sulfide and Iodide 3D Perovskite (CH3NH3)SbSI2.

Journal Article The journal of physical chemistry letters · July 2018 Lead-free antimony-based mixed sulfide and iodide perovskite phases have recently been reported to be synthesized experimentally and to exhibit reasonable photovoltaic performance. Through a combination of experimental validation and computational analysis ... Full text Cite

A Versatile Thin-Film Deposition Method for Multidimensional Semiconducting Bismuth Halides

Journal Article Chemistry of Materials · May 22, 2018 Despite the significant progress in fabricating hybrid organic-inorganic lead halide perovskite solar cells, their toxicity and low stability remain as major drawbacks, thereby hindering large-scale commercialization. Given the isoelectronic nature of lead ... Full text Cite

Halide perovskites beyond CH3NH3PbI3: Structural diversity and opportunities for semiconductor design

Conference ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY · March 18, 2018 Link to item Cite

MAPbI3 Solar Cells with Absorber Deposited by Resonant Infrared Matrix-Assisted Pulsed Laser Evaporation

Journal Article ACS Energy Letters · February 9, 2018 Resonant infrared, matrix-assisted pulsed laser evaporation (RIR-MAPLE) is a gentle thin-film deposition technique that combines the facile chemical control of solution processing with the growth control of vapor-phase deposition, yet one that has not been ... Full text Cite

Deposition of Methylammonium Lead Triiodide by Resonant Infrared Matrix-Assisted Pulsed Laser Evaporation

Journal Article Journal of Electronic Materials · February 1, 2018 Resonant infrared matrix-assisted pulsed laser evaporation (RIR-MAPLE) was used to deposit the metal-halide perovskite (MHP) CH3NH3PbI3 (methylammonium lead triiodide, or MAPbI), creating phase-pure films. Given the moisture sensitivity of these crystallin ... Full text Cite

Efficient and Stable Pt/TiO2/CdS/Cu2BaSn(S,Se)4 Photocathode for Water Electrolysis Applications

Journal Article ACS Energy Letters · January 12, 2018 The Cu2BaSnS4-xSex (CBTSSe) system has attracted remarkable attention as an emerging chalcogenide semiconductor with desirable electronic and optical properties for solar energy conversion applications. The current study combines sputtered band gap-tailore ... Full text Cite

Room-temperature fabrication of a delafossite CuCrO2 hole transport layer for perovskite solar cells

Journal Article Journal of Materials Chemistry A · January 1, 2018 Delafossite oxides are promising hole transport layer (HTL) candidates for perovskite solar cells, due to their wide band gap, favorable energy band alignment relative to the perovskite absorber and simplicity of processing. In this paper, we investigate t ... Full text Cite

Resonant infrared matrix-assisted pulsed laser evaporation of hybrid perovskites

Conference Optics InfoBase Conference Papers · January 1, 2018 Resonant infrared matrix-assisted pulsed laser evaporation (RIR-MAPLE) was used to deposit the metal-halide perovskite (MHP), CH<inf>3</inf>NH<inf>3</inf>PbI<inf>3</inf>, and solar cell performance was demonstrated, thereby establis ... Full text Cite

Additive engineering for high-performance room-temperature-processed perovskite absorbers with micron-size grains and microsecond-range carrier lifetimes

Journal Article Energy and Environmental Science · November 1, 2017 Perovskite photovoltaics have attracted remarkable attention recently due to their exceptional power conversion efficiencies (PCE). State-of-the-art perovskite absorbers typically require thermal annealing steps for high film quality. However, the annealin ... Full text Cite

Heterovalent B-Site Co-Alloying Approach for Halide Perovskite Bandgap Engineering

Journal Article ACS Energy Letters · October 13, 2017 Compositional engineering, which can enrich the database of prospective materials and offer new or enhanced properties, represents one of the key focal points within halide perovskite research. Compositional engineering studies often focus on A+ and X- sit ... Full text Cite

I2-II-IV-VI4 (I = Cu, Ag; II = Sr, Ba; IV = Ge, Sn; VI = S, Se): Chalcogenides for Thin-Film Photovoltaics

Journal Article Chemistry of Materials · September 26, 2017 Recent work has identified a non-zinc-blende-type quaternary semiconductor, Cu2BaSnS4-xSex (CBTSSe), as a promising candidate for thin-film photovoltaics (PVs). CBTSSe circumvents difficulties of competing PV materials regarding (i) toxicity (e.g., CdTe), ... Full text Cite

Chemical Origin of the Stability Difference between Copper(I)‐ and Silver(I)‐Based Halide Double Perovskites

Journal Article Angewandte Chemie · September 25, 2017 AbstractRecently, CuI‐ and AgI‐based halide double perovskites have been proposed as promising candidates for overcoming the toxicity and instability issues inherent within the emer ... Full text Cite

Chemical Origin of the Stability Difference between Copper(I)- and Silver(I)-Based Halide Double Perovskites.

Journal Article Angewandte Chemie (International ed. in English) · September 2017 Recently, CuI - and AgI -based halide double perovskites have been proposed as promising candidates for overcoming the toxicity and instability issues inherent within the emerging Pb-based halide perovskite absorbers. However, up to d ... Full text Cite

Melt Processing of Hybrid Organic-Inorganic Lead Iodide Layered Perovskites

Journal Article Chemistry of Materials · August 8, 2017 An experiment was conducted to demonstrate that Pb-based hybrid organic−inorganic perovskite (HOIPs) have 25−45 °C higher melting points compared to analogous Sn-based compounds with the same organic cations, i.e., the melting temperatures vary from 200 to ... Full text Cite

Two-Dimensional Lead(II) Halide-Based Hybrid Perovskites Templated by Acene Alkylamines: Crystal Structures, Optical Properties, and Piezoelectricity.

Journal Article Inorganic chemistry · August 2017 A series of two-dimensional (2D) hybrid organic-inorganic perovskite (HOIP) crystals, based on acene alkylamine cations (i.e., phenylmethylammonium (PMA), 2-phenylethylammonium (PEA), 1-(2-naphthyl)methanammonium (NMA), and 2-(2-naphthyl)ethanammonium (NEA ... Full text Cite

Bandgap Engineering of Lead‐Free Double Perovskite Cs2AgBiBr6 through Trivalent Metal Alloying

Journal Article Angewandte Chemie · July 3, 2017 AbstractThe double perovskite family, A2MIMIIIX6, is a promising route to overcome the lead toxicity issue confronting the current photovol ... Full text Cite

Bandgap Engineering of Lead-Free Double Perovskite Cs2 AgBiBr6 through Trivalent Metal Alloying.

Journal Article Angewandte Chemie (International ed. in English) · July 2017 The double perovskite family, A2 MI MIII X6 , is a promising route to overcome the lead toxicity issue confronting the current photovoltaic (PV) standout, CH3 NH3 PbI3 . Given the ... Full text Cite

Parity-Forbidden Transitions and Their Impact on the Optical Absorption Properties of Lead-Free Metal Halide Perovskites and Double Perovskites.

Journal Article The journal of physical chemistry letters · July 2017 Using density functional theory calculations, we analyze the optical absorption properties of lead (Pb)-free metal halide perovskites (AB2+X3) and double perovskites (A2B+B3+X6) (A = Cs or m ... Full text Cite

Defect Engineering in Multinary Earth-Abundant Chalcogenide Photovoltaic Materials

Journal Article Advanced Energy Materials · June 7, 2017 Application of zinc-blende-related chalcogenide absorbers such as CdTe and Cu(In,Ga)Se2 (CIGSe) has enabled remarkable advancement in laboratory- and commercial-scale thin-film photovoltaic performance; however concerns remain regarding the toxicity (CdTe) ... Full text Cite

Earth-Abundant Chalcogenide Photovoltaic Devices with over 5% Efficiency Based on a Cu2 BaSn(S,Se)4 Absorber.

Journal Article Advanced materials (Deerfield Beach, Fla.) · June 2017 In recent years, Cu2 ZnSn(S,Se)4 (CZTSSe) materials have enabled important progress in associated thin-film photovoltaic (PV) technology, while avoiding scarce and/or toxic metals; however, cationic disorder and associated band tailin ... Full text Cite

Intrinsic Instability of Cs2In(I)M(III)X6 (M = Bi, Sb; X = Halogen) Double Perovskites: A Combined Density Functional Theory and Experimental Study.

Journal Article Journal of the American Chemical Society · May 2017 Recently, there has been substantial interest in developing double-B-cation halide perovskites, which hold the potential to overcome the toxicity and instability issues inherent within emerging lead halide-based solar absorber materials. Among all double p ... Full text Cite

The steady rise of kesterite solar cells

Journal Article ACS Energy Letters · April 14, 2017 Full text Cite

Diffusion of cations in 2D/3D perovskite films made by melt infiltration

Conference ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY · April 2, 2017 Link to item Cite

Efficient Generation of Long-Lived Triplet Excitons in 2D Hybrid Perovskite.

Journal Article Advanced materials (Deerfield Beach, Fla.) · March 2017 Triplet excitons form in quasi-2D hybrid inorganic-organic perovskites and diffuse over 100 nm before radiating with >11% photoluminescence quantum efficiency (PLQE) at low temperatures. ... Full text Cite

Searching for promising new perovskite-based photovoltaic absorbers: The importance of electronic dimensionality

Journal Article Materials Horizons · March 1, 2017 Searching for promising nontoxic and air-stable perovskite absorbers for solar cell applications has drawn extensive attention. Here, we show that a promising perovskite absorber should exhibit a high electronic dimensionality. Semiconductors that exhibit ... Full text Cite

Candidate photoferroic absorber materials for thin-film solar cells from naturally occurring minerals: enargite, stephanite, and bournonite

Journal Article Sustainable Energy & Fuels · 2017 A search for photoactive ferroelectric minerals reveals three candidates, which are investigated using first-principles materials modelling. ... Full text Cite

Synthesis and Characterization of an Earth-Abundant Cu2BaSn(S,Se)4 Chalcogenide for Photoelectrochemical Cell Application.

Journal Article The journal of physical chemistry letters · November 2016 Cu2BaSnS4-xSex films consisting of earth-abundant metals have been examined for photocathode application. Films with different Se contents (i.e., Cu2BaSnS4-xSex with x ≤ 2.4) were synthesize ... Full text Cite

Crystal Structure of AgBi2I7 Thin Films.

Journal Article The journal of physical chemistry letters · October 2016 Synthesis of cubic-phase AgBi2I7 iodobismuthate thin films and fabrication of air-stable Pb-free solar cells using the AgBi2I7 absorber have recently been reported. On the basis of X-ray diffraction (XRD) analysi ... Full text Cite

Density-functional theory computer simulations of CZTS0.25Se0.75 alloy phase diagrams

Journal Article Journal of Chemical Physics · August 14, 2016 Density-functional theory simulations of CZTS, CZTSe, and CZTS0.25Se0.75 photovoltaic compounds have been performed to investigate the stability of the CZTS0.25Se0.75 alloy vs. decomposition into CZTS, CZTSe, and other secondary compounds. The Gibbs energy ... Full text Cite

Effects of cd diffusion and doping in high-performance perovskite solar cells using CdS as electron transport layer

Journal Article Journal of Physical Chemistry C · August 4, 2016 Perovskite solar cells with stabilized power conversion efficiency exceeding 15% have been achieved, using a methylammonium lead iodide (MAPbI3) absorber and CdS as the electron transport layer. X-ray photoelectron spectroscopy reveals a small presence of ... Full text Cite

BaCu2Sn(S,Se)4: Earth-abundant chalcogenides for thin-film photovoltaics

Journal Article Chemistry of Materials · July 12, 2016 Chalcogenides such as CdTe, Cu(In,Ga)(S,Se)2 (CIGSSe), and Cu2ZnSn(S,Se)4 (CZTSSe) have enabled remarkable advances in thin-film photovoltaic performance, but concerns remain regarding (i) the toxicity (CdTe) and (ii) scarcity (CIGSSe/CdTe) of the constitu ... Full text Cite

Employing Lead Thiocyanate Additive to Reduce the Hysteresis and Boost the Fill Factor of Planar Perovskite Solar Cells.

Journal Article Advanced materials (Deerfield Beach, Fla.) · July 2016 Lead thiocyanate in the perovskite precursor can increase the grain size of a perovskite thin film and reduce the conductivity of the grain boundaries, leading to perovskite solar cells with reduced hysteresis and enhanced fill factor. A planar perovskite ... Full text Cite

The current status and future prospects of kesterite solar cells: A brief review

Journal Article Progress in Photovoltaics: Research and Applications · June 1, 2016 Kesterite-based solar cells are attracting considerable attention in recent years, owing to the reduced toxicity and greater abundance of their constituent elements. In this brief review, we discuss the current status of this important technology by focusi ... Full text Cite

Thin-Film Deposition and Characterization of a Sn-Deficient Perovskite Derivative Cs2SnI6

Journal Article Chemistry of Materials · April 26, 2016 In this work, we describe details of a two-step deposition approach that enables the preparation of continuous and well-structured thin films of Cs2SnI6, which is a one-half Sn-deficient 0-D perovskite derivative (i.e., the compound can also be written as ... Full text Cite

Photovoltaic Properties of Two-Dimensional (CH3NH3)2Pb(SCN)2I2 Perovskite: A Combined Experimental and Density Functional Theory Study.

Journal Article The journal of physical chemistry letters · April 2016 We explore the photovoltaic-relevant properties of the 2D MA2Pb(SCN)2I2 (where MA = CH3NH3(+)) perovskite using a combination of materials synthesis, characterization and density functional theory calculation, and determine electronic properties of MA2Pb(S ... Full text Cite

Organic-Inorganic Perovskites: Structural Versatility for Functional Materials Design.

Journal Article Chemical reviews · April 2016 Although known since the late 19th century, organic-inorganic perovskites have recently received extraordinary research community attention because of their unique physical properties, which make them promising candidates for application in photovoltaic (P ... Full text Cite

Viability of Lead-Free Perovskites with Mixed Chalcogen and Halogen Anions for Photovoltaic Applications

Journal Article Journal of Physical Chemistry C · March 31, 2016 We assess the viability for photovoltaic applications of proposed Pb-free perovskites with mixed chalcogen and halogen anions, AB(Ch,X)3 (A = Cs or Ba; B = Sb or Bi; Ch = chalcogen; X = halogen), by examining critical issues such as the structural, electro ... Full text Cite

Alloying and Defect Control within Chalcogenide Perovskites for Optimized Photovoltaic Application

Journal Article Chemistry of Materials · February 9, 2016 Through density functional theory calculations, we show that the alloy perovskite system BaZr1-xTixS3 (x < 0.25) is a promising candidate for producing high power conversion efficiency (PCE) solar cells with ultrathin absorber layers. To maximize the minor ... Full text Cite

Fill Factor Losses in Cu2ZnSn(SxSe1-x)4 Solar Cells: Insights from Physical and Electrical Characterization of Devices and Exfoliated Films

Journal Article Advanced Energy Materials · February 4, 2016 Besides the open circuit voltage (VOC) deficit, fill factor (FF) is the second most significant parameter deficit for earth-abundant kesterite solar cell technology. Here, various pathways for FF loss are discussed, with focus on the series resistance issu ... Full text Cite

High intensity and integrated Suns-Voc characterization of high performance kesterite solar cells

Conference 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015 · December 14, 2015 Kesterite or Cu2ZnSn(Se,S)4 (CZTSSe) is an emerging earth-abundant thin-film solar cell technology with current world record of 12.6% which is still far behind its cousin, the CuInGaSe technology. We investigated Suns-Voc characteristics of our high perfor ... Full text Cite

Hybrid Organic-Inorganic Perovskites (HOIPs): Opportunities and Challenges.

Journal Article Advanced materials (Deerfield Beach, Fla.) · September 2015 The conclusions reached by a diverse group of scientists who attended an intense 2-day workshop on hybrid organic-inorganic perovskites are presented, including their thoughts on the most burning fundamental and practical questions regarding this unique cl ... Full text Cite

Thin-Film Preparation and Characterization of Cs3Sb2I9: A Lead-Free Layered Perovskite Semiconductor

Journal Article Chemistry of Materials · August 25, 2015 Computational, thin-film deposition, and characterization approaches have been used to examine the ternary halide semiconductor Cs3Sb2I9. Cs3Sb2I9 has two known structural modifications, the 0-D dimer form (space group P63/mmc, no. 194) and the 2-D layered ... Full text Cite

Impact of nanoscale elemental distribution in high-performance kesterite solar cells

Journal Article Advanced Energy Materials · May 1, 2015 The effort to develop earth-abundant kesterite solar cells has led to an approximate doubling of the power conversion efficiency over the past five years to 12.6%, primarily due to increases in short-circuit current and fill factor; open-circuit voltage ha ... Full text Cite

Preface

Journal Article Thin Solid Films · May 1, 2015 Full text Cite

Device Characteristics of Hydrazine-Processed CZTSSe

Chapter · January 30, 2015 The kesterite Cu2ZnSn(Se1-ySy)4 system, generally referred to as CZTSSe, is an emerging thin-film solar cell technology with many properties necessary for high photovoltaic performance, such as direct band gap, high absorption coefficient and the ability t ... Full text Cite

Fabrication and electronic properties of CZTSe single crystals

Journal Article IEEE Journal of Photovoltaics · January 1, 2015 CZTSe single crystals of different compositions were fabricated by solid-state reaction of elements in a sealed ampoule below the melt temperature. About 2-5-mm crystals were achieved without a flux agent, which, when present, can potentially affect defect ... Full text Cite

The role of sodium as a surfactant and suppressor of non-radiative recombination at internal surfaces in Cu2ZnSnS4

Journal Article Advanced Energy Materials · January 1, 2015 It is well-known that sodium improves the performance of Cu2ZnSnS4 (CZTS) devices, yet the mechanism of the enhancement is still not fully understood. This work aims to present a unified account of the relationships between grain boundaries in CZTS, sodium ... Full text Cite

Atomic layer deposition of Al-incorporated Zn(O,S) thin films with tunable electrical properties

Journal Article Applied Physics Letters · November 17, 2014 Zinc oxysulfide, Zn(O,S), films grown by atomic layer deposition were incorporated with aluminum to adjust the carrier concentration. The electron carrier concentration increased up to one order of magnitude from 1019 to 1020 cm-3 with aluminum incorporati ... Full text Cite

High efficiency Cu2ZnSn(S,Se)4 solar cells by applying a double In2S3/CdS emitter.

Journal Article Advanced materials (Deerfield Beach, Fla.) · November 2014 High-efficiency Cu2ZnSn(S,Se)4 solar cells are reported by applying In2S3/CdS double emitters. This new structure offers a high doping concentration within the Cu2ZnSn(S,Se)4 solar cells, resulting in a substantial enhancement in open-circuit voltage. The ... Full text Cite

Solar Cells: High Efficiency Cu2 ZnSn(S,Se)4 Solar Cells by Applying a Double In2 S3 /CdS Emitter (Adv. Mater. 44/2014).

Journal Article Advanced materials (Deerfield Beach, Fla.) · November 2014 On page 7427, J. Kim, H. Hiroi, T. K. Todorov, D. B. Mitzi, and co-workers report high-efficiency Cu2 ZnSn(S,Se)4 solar cells by applying In2 S3 /CdS double emitters. This new structure offers a high doping concentration within the Cu2 ZnSn(S,Se)4 solar ce ... Full text Cite

Over 12% efficiency Cu2ZnSn(SeS)4 solar cell via hybrid buffer layer

Journal Article 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014 · October 15, 2014 Efficiency of 12.3% on solution-based Cu2ZnSn(SeS)4 (CZTSeS) solar cells was achieved by applying hybrid buffer layer with combination of In-based buffer and Cd-based buffer layers. Previously, the Voc boost by the hybrid buffer layer on Cu2ZnSnS4 (CZTS) a ... Full text Cite

Perovskites in the spotlight

Journal Article MRS Bulletin · September 10, 2014 Full text Cite

Semi-empirical device model for Cu2ZnSn(S,Se)4 solar cells

Journal Article Applied Physics Letters · July 21, 2014 We present a device model for the hydrazine processed kesterite Cu2ZnSn(S,Se)4 (CZTSSe) solar cell with a world record efficiency of ∼12.6%. Detailed comparison of the simulation results, performed using wxAMPS software, to the measured device parameters s ... Full text Cite

Device characteristics of CZTSSe thin-film solar cells with 12.6% efficiency

Journal Article Advanced Energy Materials · May 13, 2014 A 12.6% Cu2ZnSnSxSe4-x (CZTSSe) solar cell is presented with detailed device characteristics. Both short-circuit current density (Jsc) and open circuit voltage (Voc) increase in the 12.6% champion, relative to previous devices, due to better bulk CZTSSe qu ... Full text Cite

Optical designs that improve the efficiency of Cu2ZnSn(S,Se) 4 solar cells

Journal Article Energy and Environmental Science · March 1, 2014 We present an optical-design approach that improves the short-circuit current and efficiency of Cu2ZnSn(S,Se)4 (CZTSSe) solar cells by tuning the thickness of the upper-device layers in order to maximize transmission into the CZTSSe absorber. The design ap ... Full text Cite

Electronic and elemental properties of the Cu2ZnSn(S,Se) 4 surface and grain boundaries

Journal Article Applied Physics Letters · January 20, 2014 X-ray and femtosecond UV photoelectron spectroscopy, secondary ion mass spectrometry and photoluminescence imaging were used to investigate the electronic and elemental properties of the CZTS,Se surface and its oxides. Oxide removal reveals a very Cu poor ... Full text Cite

Suns- VOC characteristics of high performance kesterite solar cells

Journal Article Journal of Applied Physics · January 1, 2014 Low open circuit voltage (VOC) has been recognized as the number one problem in the current generation of Cu2ZnSn(Se,S)4 (CZTSSe) solar cells. We report high light intensity and low temperature Suns-VOC measurement in high performance CZTSSe devices. The S ... Full text Open Access Cite

High-efficiency devices with pure solution-processed Cu2 ZnSn(S,Se)4 Absorbers

Journal Article IEEE Journal of Photovoltaics · January 1, 2014 Thin-film kesterite-type Cu2ZnSn(S,Se) 4 (CZTSSe) materials comprise readily available and environmentally benign elements. After reaching efficiencies in the 10% range in recent years, they have become some of the most actively studied new contenders for ... Full text Cite

CdS and Cd-free buffer layers on solution phase grown Cu 2ZnSn(SxSe1- x)4 :Band alignments and electronic structure determined with femtosecond ultraviolet photoelectron spectroscopy

Journal Article Materials Research Society Symposium Proceedings · January 1, 2014 The heterojunctions formed between solution phase grown Cu2ZnSn(SxSe1- x)4 (CZTS,Se) and a number of important buffer materials including CdS, ZnS, ZnO, and In2S3, were studied using femtosecond ultraviolet photoemission spectroscopy (fs-UPS) and photovolt ... Full text Cite

The state and future prospects of kesterite photovoltaics

Journal Article Energy and Environmental Science · November 1, 2013 A recent meeting of experts in kesterite, chalcopyrite, and related thin-film solar cell devices; characterization; and modeling from industry, academia, and national labs identified high-impact pathways forward in kesterite photovoltaics research, towards ... Full text Cite

Minority carrier diffusion length extraction in Cu2ZnSn(Se,S) 4 solar cells

Journal Article Journal of Applied Physics · September 21, 2013 We report measurement of minority carrier diffusion length (Ld) for high performance Cu2ZnSn(S,Se)4 (CZTSSe) solar cells in comparison with analogous Cu(In,Ga)(S,Se)2 (CIGSSe) devices. Our Ld extraction method involves performing systematic measurements of ... Full text Cite

Band tailing and efficiency limitation in kesterite solar cells

Journal Article Applied Physics Letters · September 2, 2013 We demonstrate that a fundamental performance bottleneck for hydrazine processed kesterite Cu2ZnSn(S,Se)4 (CZTSSe) solar cells with efficiencies reaching above 11% can be the formation of band-edge tail states, which quantum efficiency and photoluminescenc ... Full text Cite

Prospects and performance limitations for Cu-Zn-Sn-S-Se photovoltaic technology.

Journal Article Philosophical transactions. Series A, Mathematical, physical, and engineering sciences · August 2013 While cadmium telluride and copper-indium-gallium-sulfide-selenide (CIGSSe) solar cells have either already surpassed (for CdTe) or reached (for CIGSSe) the 1 GW yr⁻¹ production level, highlighting the promise of these rapidly growing thin-film technologie ... Full text Cite

Solution-processing of high-performance CZTS devices for photovoltaic application

Conference ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY · April 7, 2013 Link to item Cite

Solution-processed Cu(In,Ga)(S,Se)2 absorber yielding a 15.2% efficient solar cell

Journal Article Progress in Photovoltaics: Research and Applications · January 1, 2013 The remarkable potential for inexpensive upscale of solution processing technologies is expected to enable chalcogenide-based photovoltaic systems to become more widely adopted to meet worldwide energy needs. Here, we report a thin-film solar cell with sol ... Full text Cite

Beyond 11% effi ciency: Characteristics of state-of-the-art Cu 2ZnSn(S,Se)4Solar Cells

Journal Article Advanced Energy Materials · January 1, 2013 The authors thank S. Thiruvengadam and A. Bhagat for help with substrate preparation, S. Jay Chey and R. Drake for deposition of ZnO and ITO, R. Ferlita for Ni/Al and MgF2evaporation, S. Mahajan for area measurement, Jemima Gonsalves for TEM sample prepara ... Full text Cite

Hydrazine-processed Ge-substituted CZTSe solar cells

Journal Article Chemistry of Materials · December 11, 2012 The p-type Cu2ZnSn(SxSe1-x)4 (with x ≈ 0; CZTSe) thin-film solar cell absorber, made from earth-abundant elements, was substituted with Ge using a hydrazine-based mixed particle-solution approach for the film deposition. The crystallographic unit cell para ... Full text Cite

Electronically active defects in the Cu 2ZnSn(Se,S) 4 alloys as revealed by transient photocapacitance spectroscopy

Journal Article Applied Physics Letters · October 1, 2012 Transient photocapacitance (TPC) spectra were obtained on a series of Cu 2ZnSn(Se,S) 4 absorber devices with varying Se:S ratios, providing bandgaps (E g) between 1 eV and 1.5 eV. Efficiencies varied between 8.3% and 9.3% for devices with E g ≤ 1.2 eV and ... Full text Cite

Materials interface engineering for solution-processed photovoltaics.

Journal Article Nature · August 2012 Advances in solar photovoltaics are urgently needed to increase the performance and reduce the cost of harvesting solar power. Solution-processed photovoltaics are cost-effective to manufacture and offer the potential for physical flexibility. Rapid progre ... Full text Cite

Electronic properties of the Cu 2ZnSn(Se,S) 4 absorber layer in solar cells as revealed by admittance spectroscopy and related methods

Journal Article Applied Physics Letters · June 18, 2012 Admittance spectra and drive-level-capacitance profiles of several high performance Cu 2ZnSn(Se,S) 4 (CZTSSe) solar cells with bandgap ∼1.0-1.5 eV are reported. In contrast to the case for Cu(In,Ga)(S,Se) 2, the CZTSSe capacitance spectra exhibit a dielect ... Full text Cite

Cd-free buffer layer materials on Cu 2ZnSn(S xSe 1-x) 4: Band alignments with ZnO, ZnS, and In 2S 3

Journal Article Applied Physics Letters · May 7, 2012 The heterojunctions formed between Cu 2ZnSn(S xSe 1-x) 4 (CZTSSe) and three Cd-free n-type buffers, ZnS, ZnO, and In 2S 3, were studied using femtosecond ultraviolet photoemission and photovoltage spectroscopy. The electronic properties including the Fermi ... Full text Cite

Low band gap liquid-processed CZTSe solar cell with 10.1% efficiency

Journal Article Energy and Environmental Science · May 1, 2012 A low band gap liquid-processed Cu2ZnSn(Se1-xS x)4 (CZTSSe) kesterite solar cell with x ≈ 0.03 is prepared from earth abundant metals, yielding 10.1% power conversion efficiency. This champion cell shows a band gap of 1.04 eV, higher minority-carrier lifet ... Full text Cite

Device characteristics of a 10.1% hydrazine-processed Cu 2ZnSn(Se,S) 4 solar cell

Journal Article Progress in Photovoltaics: Research and Applications · January 1, 2012 A power conversion efficiency record of 10.1% was achieved for kesterite absorbers, using a Cu 2ZnSn(Se,S) 4 thin-film solar cell made by hydrazine-based solution processing. Key device characteristics were compiled, including light/dark J-V, quantum effic ... Full text Cite

Preface

Chapter · 2012 Cite

High efficiency Cu 2ZnSn(S xSe 1-x) 4 thin film solar cells by thermal co-evaporation

Journal Article Conference Record of the IEEE Photovoltaic Specialists Conference · December 1, 2011 We report on the device results of thermally evaporated high efficiency Cu 2ZnSn(S xSe 1-x) 4 (CZTSSe) thin film solar cells with power conversion efficiencies of 7.1% (x=1.0) and 7.5% (x=0.34). We have carried out extensive electrical and structural chara ... Full text Cite

Structure and electronic properties of grain boundaries in earth-abundant photovoltaic absorber Cu2ZnSnSe4.

Journal Article ACS nano · November 2011 We have studied the atomic and electronic structure of Cu(2)ZnSnSe(4) and CuInSe(2) grain boundaries using first-principles calculations. We find that the constituent atoms at the grain boundary in Cu(2)ZnSnSe(4) create localized defect states that promote ... Full text Cite

Defects in Cu(In,Ga)Se 2 chalcopyrite semiconductors: A comparative study of material properties, defect states, and photovoltaic performance

Journal Article Advanced Energy Materials · October 1, 2011 Understanding defects in Cu(In,Ga)(Se,S) 2 (CIGS), especially correlating changes in the film formation process with differences in material properties, photovoltaic (PV) device performance, and defect levels extracted from admittance spectroscopy, is a cr ... Full text Cite

Progress towards marketable earth-abundant chalcogenide solar cells

Journal Article Thin Solid Films · August 31, 2011 Kesterite-related photovoltaic materials are considered a promising alternative to CdTe and Cu(In,Ga)(S,Se)2 absorbers, primarily because they are not reliant on scarce elements such as indium and tellurium or the heavy metal cadmium. Recently, we reported ... Full text Cite

Slurry-based processing of high-performance CZTSSe photovoltaic absorber layers

Conference ACS National Meeting Book of Abstracts · August 25, 2011 Kesterite Cu2ZnSnS4-ySey (CZTSSe) materials are considered promising for application as thin-film photovoltaic (PV) absorber layers because of appropriate band gap (ranging from 1.0-1.5 eV, as a function of y) and low-cost, readily-available constituents. ... Cite

Band alignment at the Cu2 ZnSn (SxSe1-x) 4 /CdS interface

Journal Article Applied Physics Letters · June 20, 2011 Energy band alignments between CdS and Cu2 ZnSn (S xSe1-x) 4 (CZTSSe) grown via solution-based and vacuum-based deposition routes were studied as a function of the [S] / [S+Se] ratio with femtosecond laser ultraviolet photoelectron spectroscopy, photolumin ... Full text Cite

The path towards a high-performance solution-processed kesterite solar cell

Journal Article Solar Energy Materials and Solar Cells · June 1, 2011 Despite the promise of thin-film Cu(In,Ga)(S,Se)2 (CIGSSe) chalcopyrite and CdTe photovoltaic technologies with respect to reducing cost per watt of solar energy conversion, these approaches rely on elements that are either costly and/or rare in the earths ... Full text Cite

Structural and elemental characterization of high efficiency Cu2 ZnSnS4 solar cells

Journal Article Applied Physics Letters · January 31, 2011 We have carried out detailed microstructural studies of phase separation and grain boundary composition in Cu2 ZnSnS4 based solar cells. The absorber layer was fabricated by thermal evaporation followed by post high temperature annealing on hot plate. We s ... Full text Cite

Torwards marketable efficiency solution-processed kesterite and chalcopyrite photovoltaic devices

Conference Conference Record of the IEEE Photovoltaic Specialists Conference · December 20, 2010 Although CuIn1-xGaxSe2-yS2 (CIGS) chalcopyrite and Cu2ZnSn(S,Se)4 (CZTSSe) kesterite-related films offer significant potential for low-cost high-efficiency photovoltaic (PV) devices, the complicated multi-element nature of these materials generally leads t ... Full text Cite

Loss mechanisms in hydrazine-processed Cu2 ZnSn (Se,S) 4 solar cells

Journal Article Applied Physics Letters · December 6, 2010 We present a device characterization study for hydrazine-processed kesterite Cu2 ZnSn (Se,S)4 (CZTSSe) solar cells with a focus on pinpointing the main loss mechanisms limiting device efficiency. Temperature-dependent study and time-resolved photoluminesce ... Full text Cite

Antimony assisted low-temperature processing of CuIn1 - XGa xSe2 - ySy solar cells

Journal Article Thin Solid Films · November 1, 2010 Application of the Sb-doping method to low-temperature (≤ 400 °C) processing of CuIn1 - xGaxSe2 - ySy (CIGS) solar cells is explored, using a hydrazine-based approach to deposit the absorber films. Power conversion efficiencies of 10.5% and 8.4% have been ... Full text Cite

Thermally evaporated Cu2 ZnSnS4 solar cells

Journal Article Applied Physics Letters · October 4, 2010 High efficiency Cu2 ZnSnS4 solar cells have been fabricated on glass substrates by thermal evaporation of Cu, Zn, Sn, and S. Solar cells with up to 6.8% efficiency were obtained with absorber layer thicknesses less than 1 μm and annealing times in the minu ... Full text Cite

Non-vacuum methods for formation of Cu(In, Ga)(Se, S)2 thin film photovoltaic absorbers

Journal Article Progress in Photovoltaics: Research and Applications · September 1, 2010 Polycrystalline thin films of copper indium diselenide and its alloys with gallium and sulphur (CIGS) have proven to be suitable for use as absorbers in high-efficiency solar cells. Record efficiency devices of 20% power conversion efficiency have been pro ... Full text Cite

Plain-as-dirt solar cell may lower material costs

Journal Article LASER FOCUS WORLD · May 1, 2010 Link to item Cite

High-efficiency solar cell with Earth-abundant liquid-processed absorber.

Journal Article Advanced materials (Deerfield Beach, Fla.) · May 2010 Full text Cite

12% Efficiency CuIn(Se,S)2 photovoltaic device prepared using a hydrazine solution process

Journal Article Chemistry of Materials · February 9, 2010 Thin-film CuIn(Se,S)2 (i.e., CIS) absorbers have been solution-deposited using a hydrazine-based approach that offers the potential to significantly lower the fabrication cost for CIS solar cells. In this method, metal chalcogenides are completely dissolve ... Full text Cite

Optimization of CIGS-based PV device through antimony doping

Journal Article Chemistry of Materials · January 26, 2010 A study was conducted to demonstrate significant grain size and device performance improvement of the Cu(In,Ga)Se2 (CIGS)-based PV device through the intentional introduction of controlled Sb impurity doping into the CIGS layer film processing. A solution- ... Full text Cite

Direct liquid coating of chalcopyrite light-absorbing layers for photovoltaic devices

Journal Article European Journal of Inorganic Chemistry · January 1, 2010 Liquid deposition approaches for chalcopyrite films used in thin-film, photovoltaic: devices are reviewed. Most of the targeted materials are based, on Cu-In or Cu-In-Ga sulfides and selenides (i.e., CIS or CIGS, respectively), although recently related al ... Full text Cite

CuIn(Se,S)2 absorbers processed using a hydrazine-based solution approach

Conference Materials Research Society Symposium Proceedings · December 1, 2009 With tunable bandgap and demonstrated high efficiency, the chalcopyrite CuInSe2 and its alloys have shown great potential as absorbers for single and multi-junction solar cells. However, the current deposition techniques mostly rely on expensive vacuum-bas ... Cite

Characterization of indium tin oxide and al-doped zinc oxide thin films deposited by confocal RF magnetron sputter deposition

Journal Article Conference Record of the IEEE Photovoltaic Specialists Conference · December 1, 2009 Thin film properties (resistivity, sheet resistance, optical transmissivity, stability testing under RH85/85C conditions and film stress) were measured for indium tin oxide (ITO) and Al-doped Zinc Oxide (ZnO) (2 wt.% Al doped target) films deposited using ... Full text Cite

Solution processing of chalcogenide semiconductors via dimensional reduction

Journal Article Advanced Materials · August 21, 2009 The quest to develop thin-film solution processing approaches that offer low-cost and preferably low-temperature deposition, while simultaneously providing quality semiconductor characteristics, has become an important thrust within the materials community ... Full text Cite

Solvent properties of hydrazine in the preparation of metal chalcogenide bulk materials and films.

Journal Article Dalton transactions (Cambridge, England : 2003) · August 2009 A combination of unique solvent properties of hydrazine enables the direct dissolution of a range of metal chalcogenides at ambient temperature, rendering this an extraordinarily simple and soft synthetic approach to prepare new metal chalcogenide-based ma ... Full text Cite

PHYS 485-Solution processing of CIGS absorber layers using a hydrazine-based approach

Journal Article ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY · March 22, 2009 Link to item Cite

Hydrazine-based deposition route for device-quality CIGS films

Conference Thin Solid Films · February 2, 2009 A simple solution-based approach for depositing CIGS (Cu-In-Ga-Se/S) absorber layers is discussed, with an emphasis on film characterization, interfacial properties and integration into photovoltaic devices. The process involves incorporating all metal and ... Full text Cite

Solution processing of CIGS absorber layers using a hydrazine-based approach

Conference Conference Record of the IEEE Photovoltaic Specialists Conference · December 1, 2008 A simple solution-based approach has been developed for CIGS absorber layer deposition, employing hydrazine as the solvent for all metal chalcogenide components. Advantages of the technique include the molecular (rather than nano or microparticle) nature o ... Full text Cite

A high-efficiency solution-deposited thin-film photovoltaic device

Journal Article Advanced Materials · October 2, 2008 The simple solution-based deposition approach that employs a non-carbon-containing and weakly coordinating solvent was investigated. The solution of spin-coating were prepared by mixing the appropriate quantities of each component solution to yield a targe ... Full text Cite

Solution Processing of Inorganic Materials

Journal Article Solution Processing of Inorganic Materials · May 14, 2008 Discover the materials set to revolutionize the electronics industry. The search for electronic materials that can be cheaply solution-processed into films, while simultaneously providing quality device characteristics, represents a major challenge for mat ... Full text Cite

Novel strategy for diameter-selective separation and functionalization of single-wall carbon nanotubes.

Journal Article Nano letters · February 2008 The problem of separating single-wall carbon nanotubes (CNTs) by diameter and/or chirality is one of the greatest impediments toward the widespread application of these promising materials in nanoelectronics. In this paper, we describe a novel physical-che ... Full text Cite

Report from the third workshop on future directions of solid-state chemistry: The status of solid-state chemistry and its impact in the physical sciences

Journal Article Progress in Solid State Chemistry · January 1, 2008 Foreword: Public awareness of solid-state chemistry, or more broadly solid-state science and technology rapidly grew along with the transistor revolution and the development of the integrated circuit. We are now at the half-way point in the solid state cen ... Full text Cite

Diels-alder adduct of pentacene and maleimide: Crystal growth and the influence of solvent molecules on structure and hydrogen bonding

Journal Article Crystal Growth and Design · April 1, 2007 Crystals of the soluble Diels-Alder adduct of pentacene and maleimide, C26H17NO2, as well as of the corresponding 1:1 inclusion compounds with 1,2-dichlorobenzene and toluene and the 2:3 compound with pyridine, have been grown by either solution growth tec ... Full text Cite

N4H9Cu7S4: a hydrazinium-based salt with a layered Cu7S4- framework.

Journal Article Inorganic chemistry · February 2007 Crystals of a hydrazinium-based copper(I) sulfide salt, N4H9Cu7S4 (1), have been isolated by an ambient temperature solution-based process. In contrast to previously reported hydrazinium salts of main-group metal chalcogenides, which consist of isolated me ... Full text Cite

Solution-based processing of the phase-change material KSb 5S8

Journal Article Chemistry of Materials · December 26, 2006 A hydrazine-based process for solution-depositing phase-change materials (PCMs) is demonstrated, using KSb5S8 (KSS) as an example. The process involves dissolving the elemental metals and chalcogen in hydrazine at room temperature and spin-coating the solu ... Full text Cite

High-mobility p-type transistor based on a spin-coated metal telluride semiconductor

Journal Article Advanced Materials · September 18, 2006 The deposition of p-type CuInTe2 as the telluride-based semiconductor, was investigated. Structurally, the CuInTe2 chalcopyrite can be integrated as a II-VI zinc-blende analog, with the Zn atoms of the archetypal ZnS structure. The structure is alternative ... Full text Cite

Solution processed metal chalcogenide thin films for flexible and large scale electronics

Conference ACS National Meeting Book of Abstracts · June 28, 2006 The use of soluble hydrazinium-based metal sulfide and selenide salts for thin-film deposition to include a wider range of metal selenide systems, including one system (CuInSe2) that contains two metals was presented. The CuInSe2 system is particularly int ... Cite

Solution-processed metal chalcogenide films for p-type transistors

Journal Article Chemistry of Materials · February 7, 2006 An experiment of solution processing of organic thin film transistors (TFT) to a p-type material, is presented. A soluble precursor was prepared by combining a copper(I) sulfide (Cu 2S) and sulfur (1:2 molar ratio) solution with an indium(III) selenide (In ... Full text Cite

Novel inorganic materials for solution-processed electronics

Conference Device Research Conference - Conference Digest, DRC · January 1, 2006 Cite

Thin-film transistors based on spin-coated chalcogenide semiconductor channels

Journal Article Proceedings - Electrochemical Society · December 19, 2005 The production of high-performance solution-processed semiconductor films represents an important materials challenge, with achievement of field-effect mobilities >10 cm 2/V-sec being particularly desirable for high-speed low-cost microelectronic applicati ... Cite

High mobility solution-deposited chalcogenide films for flexible applications

Conference 2005 IEEE VLSI-TSA - International Symposium on VLSI Technology - VLSI-TSA-TECH, Proceedings of Technical Papers · October 31, 2005 The fabrication of solution-processed thin-film transistors (TFTs), which yield field-effect mobilities >10 cm2/V-sec, is a key challenge for the production of high-performance flexible electronics. This talk addresses a hydrazinium precursor approach for ... Full text Cite

Polymorphic one-dimensional (N2H4)2ZnTe: soluble precursors for the formation of hexagonal or cubic zinc telluride.

Journal Article Inorganic chemistry · October 2005 Two hydrazine zinc(II) telluride polymorphs, (N2H4)2ZnTe, have been isolated, using ambient-temperature solution-based techniques, and the crystal structures determined: alpha-(N2H4)2ZnTe (1) [P21, a = 7.2157(4) Angstroms, b = 11.5439(6) Angstroms, c = 7.3 ... Full text Cite

Tuning the band gap in hybrid tin iodide perovskite semiconductors using structural templating.

Journal Article Inorganic chemistry · June 2005 Structural distortions within the extensive family of organic/inorganic hybrid tin iodide perovskite semiconductors are correlated with their experimental exciton energies and calculated band gaps. The extent of the in- and out-of-plane angular distortion ... Full text Cite

Low-voltage transistor employing a high-mobility spin-coated chalcogenide semiconductor

Journal Article Advanced Materials · May 13, 2005 The use of In2Se3 as a semiconductor for the low-voltage transistor employing a high-mobility spin-coated chalcogenide semiconductor was discussed. The hydrazinium precursor was isolated in bulk form to avoid hydrazine use during film deposition. Thin-film ... Full text Cite

Synthesis, structure, and thermal properties of soluble hydrazinium germanium(IV) and tin(IV) selenide salts.

Journal Article Inorganic chemistry · May 2005 The crystal structures of two hydrazinium-based germanium(IV) and tin(IV) selenide salts are determined. (N(2)H(5))(4)Ge(2)Se(6) (1) [I4(1)cd, a = 12.708(1) Angstroms, c = 21.955(2) Angstroms, Z = 8] and (N(2)H(4))(3)(N(2)H(5))(4)Sn(2)Se(6) (2) [P, a = 6.6 ... Full text Cite

Standing up to be counted

Journal Article III-Vs Review · January 1, 2005 A solution processing technique for the deposition of ultrathin high mobility SnS2-xSex films was demonstrated. The precursor process employed excess chalcogen to directly improve the solubility and film formation properties of main group metal chalogenide ... Full text Cite

Solution-processed inorganic semiconductors

Journal Article Journal of Materials Chemistry · August 7, 2004 The search for semiconductors that can be solution-processed into thin-film form at low temperature, while simultaneously providing quality device characteristics, represents a significant challenge for materials chemists. Continuous thin films with field- ... Full text Cite

High-mobility ultrathin semiconducting films prepared by spin coating.

Journal Article Nature · March 2004 The ability to deposit and tailor reliable semiconducting films (with a particular recent emphasis on ultrathin systems) is indispensable for contemporary solid-state electronics. The search for thin-film semiconductors that provide simultaneously high car ... Full text Cite

[CH(3)(CH(2))(11)NH(3)]SnI(3): a hybrid semiconductor with MoO(3)-type tin(II) iodide layers.

Journal Article Inorganic chemistry · October 2003 The organic-inorganic hybrid [CH(3)(CH(2))(11)NH(3)]SnI(3) presents a lamellar structure with a Sn-I framework isotypic to that of MoO(3). The SnI(3)(-) layer consists of edge and corner-sharing SnI(6) octahedra in which one of the six Sn-I bonds is distin ... Full text Cite

Tetrakis[(9-oxo-10-thiaxanthen-2-yl-oxyethyl)ammonium] decaiodotri- plumbate(II)

Journal Article Acta Crystallographica Section E: Structure Reports Online · June 1, 2003 The structure of the title compound, (AETO)4[Pb 3I10] or (C15H14NO 2S)4[Pb3I10], contains chains of octahedrally coordinated PbI6 species along with two crystallographically independent AETO cations that hydrogen bond to these chains. Individual (Pb3I10)n4 ... Full text Cite

New structural motifs in semiconducting organic-inorganic perovskites.

Conference ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY · March 1, 2003 Link to item Cite

Crystal and electronic structure correlation in organic-inorganic perovskites.

Conference ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY · March 1, 2003 Link to item Cite

[(CH3)3NCH2CH2NH3]SnI4: a layered perovskite with quaternary/primary ammonium dications and short interlayer iodine-iodine contacts.

Journal Article Inorganic chemistry · March 2003 The organic-inorganic hybrid [(CH(3))(3)NCH(2)CH(2)NH(3)]SnI(4) presents a layered perovskite structure, templated by an organic dication containing both a primary and a quaternary ammonium group. Due to the high charge density and small size of the organi ... Full text Cite

Semiconducting perovskites (2-XC6H4C2H4NH3)2SnI4 (X = F, Cl, Br): steric interaction between the organic and inorganic layers.

Journal Article Inorganic chemistry · March 2003 Two new semiconducting hybrid perovskites based on 2-substituted phenethylammonium cations, (2-XC(6)H(4)C(2)H(4)NH(3))(2)SnI(4) (X = Br, Cl), are characterized and compared with the previously reported X = F compound, with a focus on the steric interaction ... Full text Cite

Structures, properties and devices based on hybrid perovskites and related materials.

Conference ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY · March 1, 2003 Link to item Cite

Pressure-induced phase transitions and templating effect in three-dimensional organic-inorganic hybrid perovskites

Journal Article Physical Review B - Condensed Matter and Materials Physics · January 1, 2003 Pressure-induced structural changes of conducting halide perovskites (CH3NH3)SnI3, (CH3NH3)0.5(NH2CH=NH2)0.5SnI3, and (NH2CH=NH2)SnI3, have been investigated using synchrotron x-ray powder diffraction. In contrast to low-temperature structural changes, no ... Full text Cite

Hybrid field-effect transistor based on a low-temperature melt-processed channel layer

Journal Article Advanced Materials · December 3, 2002 Hybrid field-effect…. Low-melting point hybrid perovskits have enabled the first demonstration of melt-processed field-effect transistors (FET) channel layers with both large saturation- and linear-regime mobilities. The ability to tailor the melting prope ... Full text Cite

Low-temperature melt processing of organic-inorganic hybrid films

Journal Article Chemistry of Materials · July 27, 2002 The thermal properties of semiconducting tin(II) iodide based hybrid perovskites have been modified by tailoring the organic component of the structure, thereby reducing the melting temperature (b) well below the decomposition point (c) for these systems. ... Full text Cite

Organic-inorganic perovskite semiconductors: Chemistry, properties, and device applications.

Journal Article ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY · April 7, 2002 Link to item Cite

Benzylammonium tin(II) iodide based perovskites.

Journal Article ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY · April 7, 2002 Link to item Cite

Solution deposition and patterning of organic and organic-inorganic thin film transistors.

Journal Article ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY · April 7, 2002 Link to item Cite

Benzylammonium TiN(II) iodide based perovskites.

Journal Article ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY · April 7, 2002 Link to item Cite

Intercalated organic-inorganic perovskites stabilized by fluoroaryl-aryl interactions.

Journal Article Inorganic chemistry · April 2002 Crystals of several new hybrid tin(II) iodide-based perovskites, involving 2,3,4,5,6- pentafluorophenethylammonium or phenethylammonium cation bilayers and intercalated aryl or perfluoroaryl molecules, were grown by slow evaporation of a methanol solution ... Full text Cite

Templating and structural engineering in organic-inorganic perovskites

Journal Article Journal of the Chemical Society, Dalton Transactions · December 1, 2001 Hybrid perovskites provide the possibility of integrating useful organic and inorganic characteristics within a single crystalline molecular-scale composite, enabling unique electronic, magnetic and optical properties. The ability to understand and control ... Full text Cite

Structurally tailored organic-inorganic perovskites: Optical properties and solution-processed channel materials for thin-film transistors

Journal Article Chemistry of Materials · November 9, 2001 The structures, optical properties, and field-effect mobilities of three semiconducting m-fluorophenethylammonium-based (C6H4FC2H4 NH3)2SnI4 perovskites (m = 2, 3, or 4) are reported and compared with the analogous measurements for the nonfluorosubstituted ... Full text Cite

Thin-film deposition of organic-inorganic hybrid materials

Journal Article Chemistry of Materials · November 7, 2001 Organic-inorganic hybrid films present special challenges and opportunities with respect to potential applications, as well as for the observation of interesting physical phenomena. Although the often disparate characteristics (e.g., solubility and thermal ... Full text Cite

Structure and optical properties of several organic-inorganic hybrids containing corner-sharing chains of bismuth iodide octahedra.

Journal Article Inorganic chemistry · April 2001 Two organic-inorganic bismuth iodides of the form (H3N-R-NH3)BiI5 are reported, each containing long and relatively flexible organic groups, R. The norganic framework in each case consists of distorted BiI6 octahedra sharing cis vertexes to form zigzag cha ... Full text Cite

Organic-inorganic thin-film field effect transistors.

Journal Article ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY · April 1, 2001 Link to item Cite

Thioxanthene lead perovskite structure and optical properties.

Journal Article ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY · April 1, 2001 Link to item Cite

Organic-inorganic perovskites as semiconducting channels in thin film transistors.

Journal Article ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY · April 1, 2001 Link to item Cite

Organic-inorganic electronics.

Journal Article IBM J. Res. Dev. · 2001 Full text Cite

Crystal structure and properties of dye-containing organic- inorganic perovskites

Conference Molecular Crystals and Liquid Crystals Science and Technology, Section A: Molecular Crystals and Liquid Crystals · January 1, 2001 The oligothiophene derivative, 5,5‴-bis(aminoethyl) 2,2′:5′,2″:5″, 2‴-quaterthiophene (AEQT), has been incorporated within a lead(II) halide-based perovskite framework. Single crystal X-ray analysis has been used to verify the perovskite framework and exam ... Full text Cite

Organic-inorganic electronic devices based on hybrid perovskites

Journal Article Annual Device Research Conference Digest · January 1, 2001 Organic-inorganic perovskites were used for the fabrication of organic-inorganic light emitting devices (OILED) and organic-inorganic thin film transistors (OITFT). The combination of organic and inorganic materials allowed the advantages of better lumines ... Cite

Organic-inorganic perovskites containing trivalent metal halide layers: the templating influence of the organic cation layer.

Journal Article Inorganic chemistry · December 2000 Thin sheetlike crystals of the metal-deficient perovskites (H2AEQT)M2/3I4 [M = Bi or Sb; AEQT = 5,5"'-bis-(aminoethyl)-2,2':5',2'':5'',2'''-quaterthiophene] were formed from slowly cooled ethylene glycol/2-butanol solutions containing the bismuth(III) or a ... Full text Cite

Crystal growth of perovskites and chain compounds with complex organic cations.

Journal Article ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY · March 26, 2000 Link to item Cite

The use of ionic salt dyes as amorphous, thermally stable emitting layers in organic light-emitting diodes

Journal Article Applied Physics Letters · January 3, 2000 The conversion of two neutral dye molecules (D) to ionic salts (H2N-D-NH2·2HX) and their utilization as emitting layers in organic light-emitting diodes (OLEDs) is described. The dye salts, AEQT·2HCl and APT-2HCl, can be deposited as amorphous films using ... Full text Cite

Effect of thermal annealing on the optical and morphological properties of (AETH)PbX4 (X = Br, I) perovskite films prepared using single source thermal ablation

Journal Article Chemistry of Materials · January 1, 2000 Films of the neworganic-inorganic hybrid materials AETHPbX4 (AETH = 1,6-bis[5'-(2-aminoethyl)-2'-thienyl]hexane; X = Br, I) were fabricated using single source thermal ablation (SSTA). The as-deposited films were optically smooth and nominally amorphous. T ... Full text Cite

Design, Structure, and Optical Properties of Organic-Inorganic Perovskites Containing an Oligothiophene Chromophore.

Journal Article Inorganic chemistry · December 1999 A quaterthiophene derivative, 5,5' "-bis(aminoethyl)-2,2':5',2' ':5' ',2' "-quaterthiophene (AEQT), has been selected for incorporation within the layered organic-inorganic perovskite structure. In addition to having an appropriate molecular shape and two ... Full text Cite

Organic-inorganic hybrid materials as semiconducting channels in thin-film field-effect transistors

Journal Article Science (New York, N.Y.) · October 1999 Organic-inorganic hybrid materials promise both the superior carrier mobility of inorganic semiconductors and the processability of organic materials. A thin-film field-effect transistor having an organic-inorganic hybrid material as the semiconducting cha ... Full text Cite

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Journal Article Prog. Inorg. Chem. · 1999 Cite

A layered solution crystal growth technique and the crystal structure of (C6H5C2H4NH3) 2PbCl4

Journal Article Journal of Solid State Chemistry · 1999 Single crystals of the organic-inorganic perovskite (C6H5C2H4NH3) 2PbCl4 have been grown at room temperature using a layered solution approach. The bottom solution layer, contained within a long straight tube, consists of PbCl2 dissolved in concentrated aq ... Cite

A layered solution crystal growth technique and the crystal structure of (C6H5C2H4NH3) 2PbCl4

Journal Article Journal of Solid State Chemistry · January 1, 1999 Single crystals of the organic-inorganic perovskite (C6H5C2H4NH3) 2PbCl4 have been grown at room temperature using a layered solution approach. The bottom solution layer, contained within a long straight tube, consists of PbCl2 dissolved in concentrated aq ... Full text Cite

Synthesis and Characterization of Organic-Inorganic Perovskite Thin Films Prepared Using a Versatile Two-Step Dipping Technique

Journal Article Chemistry of Materials · January 1, 1998 A convenient two-step technique for preparing thin films of the organic-inorganic perovskites (RNH3)2(CH3NH3)n-1M nI3n+1 (R = butyl, phenethyl; M = Pb, Sn; n = 1, 2, ∞) has been achieved. Films of the metal halide, MI2, were first deposited onto ash glass ... Full text Cite

Transparency of the ab planes of Bi2Sr2CaCu2O8+δ to magnetic fields

Journal Article Physical Review Letters · 1998 A sample composed of many Bi2Sr2CaCu2O8+δ single crystals was cooled to 2 K in a magnetic field of 100 G at 45° from the c axis. Muon-spin-rotation measurements were made for which the polarization was initially approximately in the ab plane. The time depe ... Cite

Transparency of the ab Planes of Bi2Sr2CaCu2O8+δto magnetic fields

Journal Article Physical Review Letters · January 1, 1998 A sample composed of many Bi2Sr2CaCu2O8+δ single crystals was cooled to 2 K in a magnetic field of 100 G at 45° from the c axis. Muon-spin-rotation measurements were made for which the polarization was initially approximately in the ab plane. The time depe ... Full text Cite

Synthesis, Resistivity, and Thermal Properties of the Cubic Perovskite NH2CH=NH2SnI3and Related Systems

Journal Article Journal of Solid State Chemistry · December 1, 1997 Combining concentrated hydriodic acid solutions of tin(II) iodide and formamidine acetate in an inert atmosphere results in the precipitation of a new conducting organic-inorganic compound, NH2CH=NH2SnI3, which at room temperature adopts a cubic perovskite ... Full text Cite

Preparation and Properties of (C4H9NH3)2EuI4: A Luminescent Organic-Inorganic Perovskite with a Divalent Rare-Earth Metal Halide Framework

Journal Article Chemistry of Materials · 1997 (C4H9NH3)2EuI4 has been prepared through the low-temperature solid-state reaction between C4H9NH2·HI and EuI2, providing the first example of a layered organic-inorganic perovskite with a divalent rare-earth metal in the perovskite sheets. The orthorhombic ... Cite

Optical and related properties and natural one-dimensional semiconductors based on PbI and SnI units

Journal Article Synthetic Metals · January 1, 1997 Optical absorption, reflectance, photoluminescence, photoluminescence excitation and photoconductivity spectra of [NH2C(I)=NH2]3MI5 (M=Pb, Sn), (Bu4N)PbI3 and similar 1D semiconductors at room temperature are reported and compared with those of the corresp ... Full text Cite

Layered group IVB metal halide organic-inorganic perovskites

Journal Article ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY · March 24, 1996 Link to item Cite

Synthesis and structure of a new perovskite, SrCuO 2.5

Journal Article Journal of Solid State Chemistry · February 1, 1996 A new oxygen-deficient perovskite, SrCuO 2.5 , was prepared at 950°C and 100 kbar pressure in a multianvil apparatus. Rietveld profile analysis, using X-ray powder diffraction data, was employed for the structural determination. SrCuO 2.5 is orthorhombic, ... Full text Cite

Synthesis and Crystal Structure of the Alkylbismuth Diiodides: A Family of Extended One-Dimensional Organometallic Compounds

Journal Article Inorganic Chemistry · January 1, 1996 Crystals of the organometallic compounds CnH2n+1+BiI2 (n = 2,4) have been grown under solvothermal conditions, using a reaction between R3Bi (R = C2H5, C4H9) and BiI3, in a diethyl ether solution. Both compounds crystallize in the orthorhombic space group ... Full text Cite

Conducting Layered Organic-inorganic Halides Containing <110>-Oriented Perovskite Sheets.

Journal Article Science (New York, N.Y.) · March 1995 Single crystals of the layered organic-inorganic perovskites, [NH(2)C(I=NH(2)](2)(CH(3)NH(3))m SnmI3m+2, were prepared by an aqueous solution growth technique. In contrast to the recently discovered family, (C(4)H(9)NH(3))(2)(CH(3)NH(3))n-1SnnI3n+1, which ... Full text Cite

Transport, optical, and magnetic properties of the conducting halide perovskite ch3nh3sni3

Journal Article Journal of Solid State Chemistry · January 1, 1995 A low-temperature (T ≤ 100°C) solution technique is described for the preparation of polycrystalline and single crystal samples of the conducting halide perovskite, CH3NH3SnI3. Transport, Hall effect, magnetic, and optical properties are examined over the ... Full text Cite

Synthesis and Characterization of [NH2C(I)=NH2]3MI5 (M = Sn, Pb): Stereochemical Activity in Divalent Tin and Lead Halides Containing Single (110) Perovskite Sheets

Journal Article Journal of the American Chemical Society · January 1, 1995 Isotypic crystals with the composition [NH2C(I)=NH2]3MI5(M = Sn, Pb) were grown from an aqueous solution. The compounds crystallize in the monoclinic space group P21/c with an unusual layered organic—inorganic structural type. The structure is configured i ... Full text Cite

Layer dependence of the superconducting transition temperature of HgBa2Can-1CunO2n+2+δ

Journal Article Physica C: Superconductivity and its applications · September 10, 1994 High-pressure methods have been used to synthesize multiphase compositions in the Hg12{n-1}n homologous series. The phase assemblages were examined by optical, electron diffraction and X-ray diffraction techniques, and their stoichiometries verified by ele ... Full text Cite

NMR studies of spin dynamics in cuprates

Conference Journal of Low Temperature Physics · April 1, 1994 We report recent NMR results in cuprates. The oxygen Knight shift and the Cu nuclear spin-lattice relaxation rate in Bi2.1Sr1.94Ca0.88Cu2.07O8+δ single crystals revealed a gapless superconducting state, which can be most naturally explained by a d-wave pai ... Full text Cite

Superconducting mercury-based cuprate films with a zero-resistance transition temperature of 124 Kelvin.

Journal Article Science (New York, N.Y.) · March 1994 The synthesis of high-quality films of the recently discovered mercury-based cuprate films with high transition temperatures has been plagued by problems such as the air sensitivity of the cuprate precursor and the volatility of Hg and HgO. These processin ... Full text Cite

Spatially resolved vacuum tunneling spectroscopy on Bi2Sr2CaCu2O8 by STM at 4.8K

Conference Physica B: Physics of Condensed Matter · February 2, 1994 We report scanning tunneling spectroscopy investigations on in-situ cleaved superconducting Bi2Sr2CaCu2O8 single crystals. Although many investigators report reproducible tunneling studies on high temperature superconductors, there nevertheless remains unc ... Full text Cite

Evidence for the quasi-two dimensional behavior of the vortex structure in Bi2Sr2CaCu2O8 single crystals

Conference Physica B: Physics of Condensed Matter · February 2, 1994 AC susceptibility and dc magnetization measurements on Bi2Sr2CaCu2O8 (BSCCO) single crystals in a wide range of temperatures clearly show that below the dc irreversibility line the vortex system loss the long range order in the c direction. The susceptibil ... Full text Cite

Conducting tin halides with a layered organic-based perovskite structure

Journal Article Nature · January 1, 1994 THE discovery1 of high-temperature superconductivity in layered copper oxide perovskites has generated considerable fundamental and technological interest in this class of materials. Only a few other examples of conducting layered perovskites are known; th ... Full text Cite

Thermal diffusivity of Bi2Sr2CaCu2O8 single crystals

Journal Article Physica C: Superconductivity and its applications · December 15, 1993 We have made direct measurements of the temperature dependence of the thermal diffusivity along all three axes of a single- crystal Bi2Ca2SrCu2O8 superconductor. We find that the thermal diffusivity is enhanced dramatically along the Cu-O planes below Tc. ... Full text Cite

Surface phonons on Bi2Sr2CaCu2O8+ delta.

Journal Article Physical review. B, Condensed matter · November 1993 Full text Cite

Loss of interplane correlation in Bi2Sr2CaCu2O8 single crystals.

Journal Article Physical review. B, Condensed matter · September 1993 Full text Cite

High-resolution scanning hall probe microscopy

Conference Proceedings of SPIE - The International Society for Optical Engineering · June 4, 1993 A high resolution scanning Hall probe microscope is used to spatially resolve vortices in high temperature superconducting Bi2Sr2CaCu2O8+δ crystals. We observe a partially ordered vortex lattice at several different applied magnetic fields and temperatures ... Full text Cite

Longitudinal disordering of vortex lattices in anisotropic superconductors.

Journal Article Physical review. B, Condensed matter · February 1993 Full text Cite

Superconducting interlayer decoupling and softening of the flux line structure in BSCCO single crystals

Conference Superconductor Science and Technology · December 1, 1992 The authors have made mechanical oscillator and AC susceptibility measurements in BSCCO single crystals over a wide range of intensities and orientations of the magnetic field. The mechanical measurements show, in addition to the large softening and dissip ... Full text Cite

Two-step transition towards the reversibility region in Bi2Sr2CaCu2O8- delta single crystals.

Journal Article Physical review. B, Condensed matter · October 1992 Full text Cite

Defect dependence of the irreversibility line in Bi2Sr2CaCu2O8 single crystals.

Journal Article Physical review. B, Condensed matter · September 1992 Full text Cite

A jelly-roll process for high temperature superconducting tapes and wires

Journal Article Materials Chemistry and Physics · January 1, 1992 As an alternative to the powder-in-tube method, a new technique called the jelly-roll process is proposed for making high-Tc superconducting tapes and wires. A normal-metal sheet coated with high-Tc cuprate is configured in a jelly-roll fashion and cold wo ... Full text Cite

Inter- and intraplane softening of the vortex structure in Bi2.1Sr1.9Ca0.9Cu2O8+δ: a two-step transition

Journal Article Physica C: Superconductivity and its applications · December 15, 1991 High Q mechanical oscillator and AC susceptibility techniques have been used to study vortex dynamics in high quality single crystals of Bi2.1Sr1.9Ca0.9Cu2O8+δ over a wide range of magnetic fields and different relative orientations between the magnetic fi ... Full text Cite

Evidence of chemical-potential shift with hole doping in Bi2Sr2CaCu2O8+ delta.

Journal Article Physical review. B, Condensed matter · December 1991 Full text Cite

Search for a proximity effect induced gap in gold/high Tc junctions

Journal Article Applied Physics Letters · December 1, 1991 We have used high-resolution photoemission spectroscopy to search for a proximity effect induced superconducting gap in gold overlayers on c-axis single crystals of Bi2Sr2CaCu2O8 and a-axis thin films of YBa2Cu3O7. These two junction types give us a repres ... Full text Cite

Nuclear relaxation behavior of the superconducting cuprates: Bi2Sr2CaCu2O8.

Journal Article Physical review. B, Condensed matter · October 1991 Full text Cite

Observation of an hexatic vortex glass in flux lattices of the high-Tc superconductor Bi2.1Sr1.9Ca0.9Cu2O8+δ

Conference Physica B: Physics of Condensed Matter · February 2, 1991 We report observation of hexatic order in Abrikosov flux lattices in very clean crystals of the high-Tc superconductor Bi2.1Sr1.9Ca0.9Cu2O8+δ (BSCCO). Our experiments consist of in situ magnetic decoration of the flux lattice at 4.2 K. Analysis of the deco ... Full text Cite

O 1s core levels in Bi2Sr2CaCu2O8+ delta single crystals.

Journal Article Physical review. B, Condensed matter · February 1991 Full text Cite

Evidence for a fermi surface in Bi2Sr2CaCu2O8+δ measured by positron 2D-ACAR

Conference Journal of Physics and Chemistry of Solids · January 1, 1991 We report positron 2D-ACAR measurements of superconducting single crystal Bi2Sr2CaCu2O8+δ (unannealed, Te ≈ 90K). The observed anisotropy exhibits a two-fold (rather than four-fold) symmetry, which is attributed to the superlattice modulation along the b-a ... Full text Cite

The gold/high temperature superconductor interface; metallicity of the near surface region and a search for the proximity effect

Conference Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films · January 1, 1991 Full text Cite

Interaction of overlayers of Al and Rb with single-crystalline surfaces of Bi2Sr2CaCu2O8

Journal Article Journal of Applied Physics · December 1, 1990 Photoemission results from Al and Rb interfaces with single crystals of Bi2Sr2CaCu2O8 high-temperature superconductors are reported. The Al and Rb adsorbates are found to react quite differently with the Bi2Sr2CaCu2O8 substrate. While adatoms of Rb signifi ... Full text Cite

Electronic structure of the gold/Bi2Sr2CaCu 2O8 and gold/EuBa2Cu3O 7-δ interfaces as studied by photoemission spectroscopy

Journal Article Applied Physics Letters · December 1, 1990 High-resolution photoemission has been used to probe the electronic structure of the gold/Bi2Sr2CaCu2O8 and gold/EuBa2Cu3O7-δ interface formed by a low-temperature (20 K) gold evaporation on cleaved high quality single crystals. We find that the metallicit ... Full text Cite

Ferrari et al. reply.

Journal Article Physical review letters · July 1990 Full text Cite

Optical anisotropy of Bi2Sr2CaCu2O8.

Journal Article Physical review. B, Condensed matter · April 1990 Full text Cite

Growth and properties of oxygen- and ion-doped Bi2Sr2CaCu2O8+ delta single crystals.

Journal Article Physical review. B, Condensed matter · April 1990 Full text Cite

Magnetic penetration depth in the organic superconductor kappa -

Journal Article Physical review letters · March 1990 Full text Cite

PHOTOTHERMAL MEASUREMENTS OF HIGH-TC SUPERCONDUCTORS

Conference PHOTOACOUSTIC AND PHOTOTHERMAL PHENOMENA II · January 1, 1990 Link to item Cite

GROWTH AND PROPERTIES OF OXYGEN DOPED BI2SR2CACU2O8+DELTA SINGLE-CRYSTALS

Conference PROCEEDINGS OF THE ICTPS 90 INTERNATIONAL CONFERENCE ON TRANSPORT PROPERTIES OF SUPERCONDUCTORS · January 1, 1990 Link to item Cite

NATURE OF THE VALENCE BAND STATES IN BI2(CA,SR,LA)3CU2O8

Conference HIGH TC SUPERCONDUCTING THIN FILMS : PROCESSING, CHARACTERIZATION, AND APPLICATIONS · January 1, 1990 Link to item Cite

Spectroscopic evidence of two-dimensional character of the 90 K Bi 2(Sr,La,Ca)3Cu2O8 superconductors

Journal Article Applied Physics Letters · December 1, 1989 Polarization-dependent angle-resolved photoemission experiments in the constant final state mode (absorption measurements) were performed on single crystals of the Bi-based 2212 material using synchrotron radiation in the photon energy range 10-40 eV. Evid ... Full text Cite

Photothermal measurements of high Tc superconductors

Journal Article Applied Physics Letters · December 1, 1989 We demonstrate a photothermal method for making point measurements of the thermal conductivities of high Tc superconductors. Images made at room temperature on polycrystalline materials show the thermal inhomogeneities. Measurements on single-crystal Bi2Sr ... Full text Cite

Electronic structure of clean and Ag-covered single-crystalline Bi2Sr2CuO6.

Journal Article Physical review. B, Condensed matter · November 1989 Full text Cite

Valence-band states in Bi2(Ca,Sr,La)3Cu2O8.

Journal Article Physical review. B, Condensed matter · September 1989 Full text Cite

The electronic structure of Bi2.0Sr1.8La0.3Ca0.8Cu2.1O8+δ superconductors studied using ultraviolet and X-ray photoelectron spectroscopy

Journal Article Physica C: Superconductivity and its applications · July 15, 1989 Photoemission measurements on single crystals of La-doped 2212 (Bi2.0Sr1.8La0.3Ca0.8Cu2.1O8+δ) superconductors were carried out utilizing both synchrotron and Al Kα (1486.6 eV) radiation. A quantitative analysis of the photoemission data in comparison with ... Full text Cite

Low-temperature specific heat of single-crystal Bi2CaSr2Cu2O8 and Tl2Ca2Ba2Cu3O10.

Journal Article Physical review. B, Condensed matter · June 1989 Full text Cite

Photoelectron energy-loss study of the Bi2CaSr2Cu2O8 superconductor.

Journal Article Physical review. B, Condensed matter · March 1989 Full text Cite

Symmetry of the oxygen hole states in Bi2Sr2CaCu2O8 investigated by XAS

Journal Article Physica C: Superconductivity and its applications · February 1, 1989 We have observed strong polarization dependence in the X-ray absorption near the oxygen K edge in a single crystal of Bi2Sr2CaCu2O8 (Tc=85 K). The results show that O-derived holes near the Fermi-level have px, y (perpendicular to the c-axis) symmetry. Som ... Full text Cite

Electron tunneling and the energy gap in Bi2Sr2CaCu2Ox.

Journal Article Physical review. B, Condensed matter · January 1989 Full text Cite

Orthorhombic and tetragonal structures in the La(Ba2-yLay)Cu3O7-x system

Journal Article Solid State Ionics · January 1, 1989 The crystal structures present in a series of La(Ba2-yLay)Cu3O7-x samples with y=0.5, 0.375, 0.25, and 0.125 have been investigated by Rietveld refinements of X-ray and neutron powder diffraction data. For y=0.5 and x=-0.20, the structure is tetragonal, P4 ... Full text Cite

Photoemission study of the electronic structure (Pr0.2La0.8)(Ba1.875La0.125)Cu3O7-gd

Journal Article Solid State Communications · January 1, 1989 Photoemission results from the Pr and La doped 1 2 3 system (Pr0.2La0.8) (Ba1.875La0.125)Cu3O7-gd are reported. The core level spectra show strong resemblance to those of other compounds of the 1 2 3 and 2 1 4 systems. The Cu 2p satellite intensity is foun ... Full text Cite

Electronic structure of single crystalline Bi2(Sr,Ca,La)3Cu2O8

Conference Physica C: Superconductivity and its applications · January 1, 1989 Angle-resolved photoemission experiments on single crystals of Bi2(Sr,Ca,La)3Cu2O8 are reported. The data show a dispersionless behaviour of the valence band states as a function of the perpendicular component of the wave vector (along the c-axis), while a ... Full text Cite

Electronic structure of the La1 + xBa2 - xCu3O7 + δ system studied by photoelectron spectroscopy

Journal Article Solid State Communications · January 1, 1989 Photoemission experiments utilizing synchrotron radiation have been carried out on the high temperature superconductor La1.075Ba1.925Cu3O7.0. The valence band spectra show similar spectral features as those of YBa2Cu3O6.9, even though large differences in ... Full text Cite

The Origin of the Superstructure in Bi2Sr2CaCu2O8+dgr as Revealed by Scanning Tunneling Microscopy.

Journal Article Science (New York, N.Y.) · December 1988 Real-space images with atomic resolution of the BiO plane of Bi(2)Sr(2)CaCu(2)O(8+delta) were obtained with a scanning tunneling microscope. Single-crystal samples were cleaved and imaged under ultrahigh vacuum conditions at room temperature. The images cl ... Full text Cite

Raman scattering spectra of superconducting Bi2Sr2CaCu2O8 single crystals.

Journal Article Physical review. B, Condensed matter · December 1988 Full text Cite

Surface structure of Bi2Sr2CaCu2O 8+δ high-temperature superconductors studied using low-energy electron diffraction

Journal Article Applied Physics Letters · December 1, 1988 The surface structure of Bi2Sr2CaCu2O 8+δ has been studied using low-energy electron diffraction (LEED). Sharp diffraction spots indicative of a well-ordered surface are observed. The LEED patterns unequivocally show that this type of material preferential ... Full text Cite

Site-selective doping and superconductivity in (La1-yPry)(Ba2-xLax)Cu3O7+ delta.

Journal Article Physical review. B, Condensed matter · October 1988 Full text Cite

The origin of the superstructure in Bi2Sr2CaCu 2O8+δ as revealed by scanning tunneling microscopy

Journal Article Science · 1988 Real-space images with atomic resolution of the BiO plane of Bi 2Sr2CaCu2O8+δ were obtained with a scanning tunneling microscope. Single-crystal samples were cleaved and imaged under ultrahigh vacuum conditions at room temperature. The images clearly show ... Cite

Point-contact electron tunneling into the high-Tc superconductor Y-Ba-Cu-O.

Journal Article Physical review. B, Condensed matter · June 1987 Full text Cite

Electron-tunneling studies of thin films of high-Tc superconducting La-Sr-Cu-O.

Journal Article Physical review. B, Condensed matter · May 1987 Full text Cite

Superconductivity and magnetism in the high-Tc superconductor YBaCuO.

Journal Article Physical review letters · April 1987 Full text Cite

CHANNEL SQUID.

Journal Article IBM technical disclosure bulletin · January 1, 1984 This article relates generally to Superconducting Quantum Interference Devices (SQUIDs). Particular attention is on a SQUID in which the junctions involved are in a plane perpendicular to the plane of the substrate. ... Cite