Journal
ADVANCED MATERIALS
Volume 32, Issue 30, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202002893
Keywords
atomic layer deposition; bulk heterojunctions; photoelectrochemical cells; water splitting
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Funding
- National Natural Science Foundation of China [51772197, 51422206, 51372159]
- 333 High-level Talents Cultivation Project of Jiangsu Province
- 1000 Youth Talents Plan
- Key University Science Research Project of Jiangsu Province [17KJA430013]
- Six Talents Peak Project of Jiangsu Province
- Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions
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The integration of photoelectrochemical photoanodes and solar cells to build an unbiased solar-to-hydrogen (STH) conversion system provides a promising way to solve the energy crisis. The key point is to develop highly transparent photoanodes, while its bulk separation efficiency (eta(sep.)) and surface injection efficiency are as high as possible. To resolve this contradiction, first a novel CdIn2S4/In(2)S(3)bulk heterojunctions in the interior of nanosheets is designed as a photoanode with high transparency and an ultrahigh eta(sep.)up to 90%. Furthermore, decorating the ultrathin amorphous SnO(2)layer by atomic layer deposition, the surface oxygen-evolution kinetics of the photoanode are increased significantly. As a result, the onset potential of the photoanode shifts negatively to 0.02 V vs RHE, and the photocurrent density boosts to 2.98 mA cm(-2)at 1.23 V vs RHE, which is ten times higher than that of pristine CdIn2S4. Such a high-performance photoanode enables the integrated metal sulfide photoanode-perovskite solar cell system to deliver a STH conversion efficiency of 3.3%.
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