Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 3, Issue 8, Pages 4155-4162Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta05523c
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Funding
- VIDI by NWO-STW
- BioSolar Cells open innovation consortium - Dutch Ministry of Economic Affairs, Agriculture and Innovation
- Joint Center for Artificial Photosynthesis, a DOE Energy Innovation Hub through Office of Science of the U.S. Department of Energy [DE-SC0004993]
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A cost-effective and earth-abundant photocathode based on hydrogenated amorphous silicon carbide (a-SiC:H) is demonstrated to split water into hydrogen and oxygen using solar energy. A monolithic a-SiC:H photoelectrochemical (PEC) cathode integrated with a hydrogenated amorphous silicon (a-SiC:H)/nano-crystalline silicon (nc-Si:H) double photovoltaic (PV) junction achieved a current density of -5.1 mA cm(-2) at 0 V versus the reversible hydrogen electrode. The a-SiC:H photocathode used no hydrogen-evolution catalyst and the high current density was obtained using gradient boron doping. The growth of high quality nc-Si:H PV junctions in combination with optimized spectral utilization was achieved using glass substrates with integrated micro-textured photonic structures. The performance of the PEC/PV cathode was analyzed by simulations using Advanced Semiconductor Analysis (ASA) software.
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