Band-aligned C3N4−xS3x/2 stabilizes CdS/CuInGaS2 photocathodes for efficient water reduction

Danping Wang, Chongwu Wang, F. Pelayo García de Arquer, Juhua Zhong*, Ling Qian, Lijun Fang, Pengfei Liu, Yuanjie Pang, Min Liu, Mengxia Liu, Gengfeng Zheng, David Sinton, Edward H. Sargent, Huagui Yang, Bo Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Compared with bare CIGS films and CdS-modified CIGS films (CdS/CIGS), C3N4−xS3x/2/CdS/CIGS electrodes exhibit a reduction of 200 mV in the onset potential. They also show a doubled photocurrent at 0 V versus the RHE, and a broadband 20% enhancement of incident photon to current efficiency (IPCE) in noble-metal-free systems. Remarkably, the C3N4−xS3x/2/CdS/CIGS electrode shows ≤5% loss over 20 hours of continuous operation, whereas bare CdS/CIGS shows a rapid degradation within the first 4 hours.

Original languageEnglish (US)
Pages (from-to)3167-3171
Number of pages5
JournalJournal of Materials Chemistry A
Volume5
Issue number7
DOIs
StatePublished - 2017

Funding

This work was supported by the National Natural Science Foundation of China (21503079, 21573068 and 21373083) and Shanghai Municipal Natural Science Foundation (14ZR1410200).

ASJC Scopus subject areas

  • General Chemistry
  • Renewable Energy, Sustainability and the Environment
  • General Materials Science

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