Journal
RSC ADVANCES
Volume 5, Issue 4, Pages 2543-2549Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra13721c
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Funding
- National Basic Research Program of China [2014CB931703]
- Natural Science Foundation of China [21203099, 51171127, 51102176, 51271129]
- Natural Science Foundation of Tianjin City [12JCZDJC29600, 13JCYBJC36800]
- State Key Laboratory of Luminescent Materials and Devices [2014-skllmd-05]
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Cu2ZnSnS4 (CZTS) is promising for application in photoelectrochemical (PEC) water splitting systems, owing to its high absorption coefficient, abundance, non-toxicity and direct band gap suitable for solar conversion. Here we present a scalable route for the preparation of single crystalline CZTS nanosheet arrays (NSAs) on a conductive glass substrate by using CuS nanosheets (NSs) as a sacrificial template. When employed as a photocathode for PEC solar hydrogen production, the CZTS NSAs yield a photocurrent density of -1.32 mA cm(-2) at 0 V versus the reversible hydrogen electrode under illumination of AM 1.5. This is the highest value ever reported for a CZTS-based electrode without a co-catalyst and protective layer. The CZTS NSAs photocathode remains active after 3.5 h of testing and maintains 60% of its initial photocurrent. This work demonstrates the reality of using earth-abundant CZTS for efficient hydrogen production.
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