使用基于 ZnTe 的光电极和串联的钙钛矿太阳能电池实现 CO2 到 CO 的无偏置太阳光驱动人工光合作用。
Unbiased Sunlight-Driven Artificial Photosynthesis of Carbon Monoxide from CO2 Using a ZnTe-Based Photocathode and a Perovskite Solar Cell in Tandem.
机构信息
Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH) , Pohang, 37673 South Korea.
Photo-electronic Hybrids Research Center, Korea Institute of Science and Technology (KIST) , Seoul, 02792 South Korea.
出版信息
ACS Nano. 2016 Jul 26;10(7):6980-7. doi: 10.1021/acsnano.6b02965. Epub 2016 Jul 7.
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 H2 as a minor product.
太阳能燃料的生产，模仿了将二氧化碳转化为有用燃料并将太阳能储存为化学能的自然光合作用，近年来受到了极大的关注。实际的大规模燃料生产需要一种独特的装置，该装置仅使用太阳能和水作为电子源就能实现二氧化碳还原。在这里，我们报告了这样一个系统，它由一个金修饰的三层 ZnO@ZnTe@CdTe 核壳纳米棒阵列光电阴极和一个 CH3NH3PbI3 钙钛矿太阳能电池串联组成。该组件允许在单光子激发下，从前侧光电阴极有效收集更高能量的光子（>2.14 eV）和后侧位置的钙钛矿太阳能电池中的更低能量的光子（>1.5 eV）。该系统代表了在没有外部偏压的情况下，在阳光照射下运行的光电阴极-光伏串联装置的一个例子，可用于选择性地将二氧化碳转化。它表现出超过 0.35%的稳定太阳能到 CO 的转化率，以及包括氢气作为次要产物的超过 0.43%的太阳能到燃料的转化率。
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