Journal
SCIENCE
Volume 345, Issue 6204, Pages 1593-1596Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1258307
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Funding
- Swiss Federal Office for Energy (PECHouse Competence Center) [SI/500090-02]
- Europe's Fuel Cell and Hydrogen Joint Undertaking [621252]
- European Union [308997, 577490]
- Swiss National Science Foundation
- Swiss National Center of Competence in Research Molecular Ultrafast Science and Technology
- European Research Council [ARG 247404]
- Singapore-Berkeley Research Initiative for Sustainable Energy (SinBeRISE) program
- National Research Foundation of Korea - Ministry of Science, ICT & Future Planning (MSIP) of Korea [NRF-2012M1A2A2671721, NRF-2012M3A6A7054861]
- National Research Foundation of Korea [2012M3A6A7054861, 2009-0092951] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Although sunlight-driven water splitting is a promising route to sustainable hydrogen fuel production, widespread implementation is hampered by the expense of the necessary photovoltaic and photoelectrochemical apparatus. Here, we describe a highly efficient and low-cost water-splitting cell combining a state-of-the-art solution-processed perovskite tandem solar cell and a bifunctional Earth-abundant catalyst. The catalyst electrode, a NiFe layered double hydroxide, exhibits high activity toward both the oxygen and hydrogen evolution reactions in alkaline electrolyte. The combination of the two yields a water-splitting photocurrent density of around 10 milliamperes per square centimeter, corresponding to a solar-to-hydrogen efficiency of 12.3%. Currently, the perovskite instability limits the cell lifetime.
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