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

Journal Article (Journal Article)

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-tailored CBTSSe films with TiO2/CdS protective overlayers to significantly improve photoelectrochemical (PEC) properties as well as device stability in aqueous solutions under AM 1.5G simulated sunlight. The Pt/TiO2/CdS/CBTSSe(x ≈ 3) photocathode exhibits relatively high photocurrent (∼12.08 mA/cm2 at 0 V/RHE, i.e., the highest value reported for CBTSSe-based PEC devices) and stable hydrogen evolution for more than 10 h. The applied TiO2/CdS layers protect the underlying CBTSSe and create desirable band alignment for efficient charge extraction at the heterointerfaces. The present results highlight the opportunities that CBTSSe materials provide as efficient and stable photocathodes for water electrolysis.

Full Text

Duke Authors

Cited Authors

  • Zhou, Y; Shin, D; Ngaboyamahina, E; Han, Q; Parker, CB; Mitzi, DB; Glass, JT

Published Date

  • January 12, 2018

Published In

Volume / Issue

  • 3 / 1

Start / End Page

  • 177 - 183

Electronic International Standard Serial Number (EISSN)

  • 2380-8195

Digital Object Identifier (DOI)

  • 10.1021/acsenergylett.7b01062

Citation Source

  • Scopus