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首页> 美国卫生研究院文献>Scientific Reports >Exceptionally omnidirectional broadband light harvesting scheme for multi-junction concentrator solar cells achieved via ZnO nanoneedles
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Exceptionally omnidirectional broadband light harvesting scheme for multi-junction concentrator solar cells achieved via ZnO nanoneedles

机译：通过ZnO纳米针实现的多结聚光太阳能电池的全向宽带光收集方案

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摘要

GaInP/GaAs/Ge triple-junction concentrator solar cells with significant efficiency enhancement were demonstrated with antireflective ZnO nanoneedles. The novel nanostructure was attained with a Zn(NO3)2-based solution containing vitamin C. Under one sun AM 1.5G solar spectrum, conversion efficiency of the triple-junction device was improved by 23.7% via broadband improvement in short-circuit currents of 3 sub-cells after the coverage by the nanoneedles with a graded refractive index profile. The efficiency enhancement further went up to 45.8% at 100 suns. The performance boost through the nanoneedles also became increasingly pronounced in the conditions of high incident angles and the cloudy weather, e.g. 220.0% of efficiency enhancement was observed at the incident angle of 60°. These results were attributed to the exceptional broadband omnidirectionality of the antireflective nanoneedles.
机译：GaInP / GaAs / Ge三结聚光太阳能电池具有显着的效率提高，已通过抗反射ZnO纳米针进行了证明。用含有维生素C的Zn（NO3）2基溶液可以得到新颖的纳米结构。在一个AM 1.5G太阳光谱下，通过宽带短路电流的宽带改善，三结器件的转换效率提高了23.7％。纳米针覆盖后具有渐变折射率分布的3个子单元。在100个阳光下，效率进一步提高到45.8％。在高入射角和多云天气（例如高温）条件下，通过纳米针的性能提升也变得越来越明显。在60°的入射角观察到220.0％的效率提高。这些结果归因于抗反射纳米针出色的宽带全向性。

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