期刊
ACS NANO
卷 10, 期 7, 页码 6980-6987出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.6b02965
关键词
artificial photosynthesis; unbiased photoelectrochemical cell; ZnTe photocathode; perovskite solar cell; CO2 reduction
类别
资金
- Brain Korea Plus Program of Ministry of Education, Climate Change Response Project [2015M1A2A2074663, 2015M1A2A2056824]
- Korean Centre for Artificial Photosynthesis [NRF-2011-C1AAA0001-2011-0030278]
- Basic Science Grant - MISIP [NRF-2015R1A2A1A10054346]
- MOTIE of Republic of Korea [10050509]
- KIST institutional programs
- Ministry of Science, ICT & Future Planning, Republic of Korea [2E26520] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2015M1A2A2074663, 2015M1A2A2056824, 2009-0093880] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Solar fuel production, mimicking natural photosynthesis of converting CO2 into useful fuels and storing solar energy as chemical energy, has received great attention in recent years. Practical large-scale fuel production needs a unique device capable of CO2 reduction using only solar energy and water as an electron source. Here we report such a system composed of a gold-decorated triple-layered ZnO@ZnTe@CdTe core-shell nanorod array photocathode and a CH3NH3PbI3 perovskite solar cell in tandem. The assembly allows effective light harvesting of higher energy photons (>2.14 eV) from the front-side photocathode and lower energy photons (>1.5 eV) from the back-side-positioned perovskite solar cell in a single-photon excitation. This system represents an example of a photocathode-photovoltaic tandem device operating under sunlight without external bias for selective CO2 conversion. It exhibited a steady solar-to-CO conversion efficiency over 0.35% and a solar-to-fuel conversion efficiency exceeding 0.43% including H-2 as a minor product.
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