Journal
CHEMPHYSCHEM
Volume 15, Issue 18, Pages 4026-4031Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.201402552
Keywords
electrolysis; photoelectrochemistry; photovoltaics; solar cells; water splitting
Funding
- DFG [SPP 1613]
- DFG Excellence Initiative, Darmstadt Graduate School of Energy Science and Engineering [GSC 1070]
- German Federal Ministry of Education and Research [FKZ: 03X3581A]
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In this study amorphous silicon tandem solar cells are successfully utilized as photoelectrodes in a photoelectrochemical cell for water electrolysis. The tandem cells are modified with various amounts of platinum and are combined with a ruthenium oxide counter electrode. In a two-electrode arrangement this system is capable of splitting water without external bias with a short-circuit current of 4.50 mA cm(-2). On the assumption that no faradaic losses occur, a solar-to-hydrogen efficiency of 5.54% is achieved. In order to identify the relevant loss processes, additional three-electrode measurements were performed for each involved half-cell.
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