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Ì«ÑôÄÜȼÁÏµç³ØÖ®¸¸Michael Grätzel×î½ü±¨µÀÁËÒ»ÖÖ¹â½âË®Ìåϵ£¬Ê¹ÓøÆîÑ¿ó²ÄÁÏ×÷Ϊµç¼«£¬¿ÉÒÔ·Ö½âˮЧÂÊ´ïµ½12.3%¡£
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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.ScienceÉÏÖØ´óÍ»ÆÆ¡ª¡ª¸ÆîÑ¿ó»ùµç¼«¹â½âˮЧÂÊ´ïµ½12.3%£¨Michael Grätzel³öÆ·£©
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