Band-aligned C3N4-xS3x/2 stabilizes CdS/CuInGaS2 photocathodes for efficient water reduction
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Wang, Chongwu
de Arquer, F Pelayo Garcia
Zhong, Juhua
Qian, Ling
Fang, Lijun
Liu, Pengfei
Pang, Yuanjie
Liu, Min
Liu, Mengxia
Zheng, Gengfeng
Sinton, David
Sargent, Edward H
Yang, Huagui
Zhang, Bo
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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.
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Journal of Materials Chemistry A
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5
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7
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© 2017 Royal Society of Chemistry. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal website for access to the definitive, published version.
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Macromolecular and materials chemistry
Materials engineering
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Physical Sciences
Chemistry, Physical
Energy & Fuels
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Wang, D; Wang, C; de Arquer, FPG; Zhong, J; Qian, L; Fang, L; Liu, P; Pang, Y; Liu, M; Liu, M; Zheng, G; Sinton, D; Sargent, EH; Yang, H; Zhang, B, Band-aligned C3N4-xS3x/2 stabilizes CdS/CuInGaS2 photocathodes for efficient water reduction, Journal of Materials Chemistry A, 2017, 5 (7), pp. 3167-3171