Water photolysis at 12.3% efficiency via perovskite photovoltaics and Earth-abundant catalysts

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.


Published in:
Science, 345, 6204, 1593-1596
Year:
2014
Publisher:
Washington, American Association for the Advancement of Science
ISSN:
0036-8075
Laboratories:




 Record created 2014-10-23, last modified 2018-09-13


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