Synthesis and Characterization of an Earth-Abundant Cu2 BaSn(S,Se)4 Chalcogenide for Photoelectrochemical Cell Application.

Journal Article (Journal Article)

Cu2 BaSnS4-x Sex films consisting of earth-abundant metals have been examined for photocathode application. Films with different Se contents (i.e., Cu2 BaSnS4-x Sex with x ≤ 2.4) were synthesized using a cosputter system with post-deposition sulfurization/selenization annealing treatments. Each film adopts a trigonal P31 crystal structure, with progressively larger lattice constants and with band gaps shifting from 2.0 to 1.6 eV, as more Se substitutes for S in the parent compound Cu2 BaSnS4 . Given the suitable bandgap and earth-abundant elements, the Cu2 BaSnS4-x Sex films were studied as prospective photocathodes for water splitting. Greater than 6 mA/cm2 was obtained under illumination at -0.4 V versus reversible hydrogen electrode for Pt/Cu2 BaSnS4-x Sex films with ∼60% Se content (i.e., x = 2.4), whereas a bare Cu2 BaSnS4-x Sex (x = 2.4) film yielded ∼3 mA/cm2 at -0.4 V/RHE.

Full Text

Duke Authors

Cited Authors

  • Shin, D; Ngaboyamahina, E; Zhou, Y; Glass, JT; Mitzi, DB

Published Date

  • November 2016

Published In

Volume / Issue

  • 7 / 22

Start / End Page

  • 4554 - 4561

PubMed ID

  • 27790903

Electronic International Standard Serial Number (EISSN)

  • 1948-7185

International Standard Serial Number (ISSN)

  • 1948-7185

Digital Object Identifier (DOI)

  • 10.1021/acs.jpclett.6b02010

Language

  • eng