Skip to main content
construction release_alert
Scholars@Duke will be undergoing maintenance April 11-15. Some features may be unavailable during this time.
cancel
Journal cover image

Probing the Spatial Heterogeneity of Carrier Relaxation Dynamics in CH3NH3PbI3 Perovskite Thin Films with Femtosecond Time‐Resolved Nonlinear Optical Microscopy

Publication ,  Journal Article
Yu, J; Li, Z; Liao, Y; Kolodziej, C; Kuyuldar, S; Warren, WS; Burda, C; Fischer, MC
Published in: Advanced Optical Materials
November 2019

The spatial heterogeneity of carrier dynamics in polycrystalline metal halide perovskite (MHP) thin films has a strong influence on photovoltaic device performance; however, the underlying cause is not yet clearly understood. Here, the sub‐micrometer scale mapping of charge carrier dynamics in CHNHPbI thin films using time‐resolved nonlinear optical microscopy, specifically transient absorption microscopy (TAM) with sub‐picosecond (ps) and time‐resolved photoluminescence (PL) microscopy with nanosecond temporal resolution is reported. To study the influence of physical morphology on charge carrier dynamics, MHP thin films having granular‐ and fibrous structures are investigated. On both types of films, spatial regions with short‐lived transient gain signals (fast nonradiative relaxation within ≈1 ps) typically show slower charge recombination via radiative relaxation, which is attributed to the presence of additional energy states near the band edge. In addition, fibrous films show longer PL lifetimes. Interestingly, the functional contrast shown in TAM images exhibits fundamental differences from the structural contrast shown in scanning electron microscopy images, implying that the variation of trap density in the bulk contributes to the observed spatial heterogeneity in carrier dynamics.

Duke Scholars

Published In

Advanced Optical Materials

DOI

EISSN

2195-1071

ISSN

2195-1071

Publication Date

November 2019

Volume

7

Issue

22

Publisher

Wiley

Related Subject Headings

  • 5104 Condensed matter physics
  • 4016 Materials engineering
  • 3403 Macromolecular and materials chemistry
  • 0912 Materials Engineering
  • 0906 Electrical and Electronic Engineering
  • 0205 Optical Physics
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Yu, J., Li, Z., Liao, Y., Kolodziej, C., Kuyuldar, S., Warren, W. S., … Fischer, M. C. (2019). Probing the Spatial Heterogeneity of Carrier Relaxation Dynamics in CH3NH3PbI3 Perovskite Thin Films with Femtosecond Time‐Resolved Nonlinear Optical Microscopy. Advanced Optical Materials, 7(22). https://doi.org/10.1002/adom.201901185
Yu, Jin, Zhongguo Li, Yuheng Liao, Charles Kolodziej, Seher Kuyuldar, Warren S. Warren, Clemens Burda, and Martin C. Fischer. “Probing the Spatial Heterogeneity of Carrier Relaxation Dynamics in CH3NH3PbI3 Perovskite Thin Films with Femtosecond Time‐Resolved Nonlinear Optical Microscopy.” Advanced Optical Materials 7, no. 22 (November 2019). https://doi.org/10.1002/adom.201901185.
Yu J, Li Z, Liao Y, Kolodziej C, Kuyuldar S, Warren WS, et al. Probing the Spatial Heterogeneity of Carrier Relaxation Dynamics in CH3NH3PbI3 Perovskite Thin Films with Femtosecond Time‐Resolved Nonlinear Optical Microscopy. Advanced Optical Materials. 2019 Nov;7(22).
Yu, Jin, et al. “Probing the Spatial Heterogeneity of Carrier Relaxation Dynamics in CH3NH3PbI3 Perovskite Thin Films with Femtosecond Time‐Resolved Nonlinear Optical Microscopy.” Advanced Optical Materials, vol. 7, no. 22, Wiley, Nov. 2019. Crossref, doi:10.1002/adom.201901185.
Yu J, Li Z, Liao Y, Kolodziej C, Kuyuldar S, Warren WS, Burda C, Fischer MC. Probing the Spatial Heterogeneity of Carrier Relaxation Dynamics in CH3NH3PbI3 Perovskite Thin Films with Femtosecond Time‐Resolved Nonlinear Optical Microscopy. Advanced Optical Materials. Wiley; 2019 Nov;7(22).
Journal cover image

Published In

Advanced Optical Materials

DOI

EISSN

2195-1071

ISSN

2195-1071

Publication Date

November 2019

Volume

7

Issue

22

Publisher

Wiley

Related Subject Headings

  • 5104 Condensed matter physics
  • 4016 Materials engineering
  • 3403 Macromolecular and materials chemistry
  • 0912 Materials Engineering
  • 0906 Electrical and Electronic Engineering
  • 0205 Optical Physics