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A highly efficient nano-graphite electron transport layer for high performance ZnO/Si solar cells†
Sustainable Energy & Fuels ( IF 5.6 ) Pub Date : 2018-01-15 00:00:00 , DOI: 10.1039/c8se00007g
Ming Chen 1, 2, 3, 4, 5 , Gang Wu 1, 2, 3, 4, 5 , Minmin Zhang 1, 2, 3, 4, 5 , Jie Liu 1, 2, 3, 4, 5 , Jiantao Zai 6, 7, 8, 9, 10 , Xuefeng Qian 6, 7, 8, 9, 10 , Xibin Yu 1, 2, 3, 4, 5
Affiliation  

Photovoltaic modules are considered as the most efficient way to utilize solar energy, while the power conversion efficiencies of commercial crystalline silicon (c-Si) solar cells still need to be improved. Herein, nano-graphite was designed as a highly efficient electron transport layer in high performance ZnO/Si solar cells and prepared via a simple solution phase deposition and rapid annealing process. The ZnO QDs can broaden the range of spectral response by generating more electron–hole pairs via multiple exciton effects. The built-in-field formed between the n-type ZnO QD layer and n-type Si and highly conductive nano-graphite can accelerate the electron collection and transportation from n-type Si to the front electrode. Thus, the designed Si solar cell with nano-graphite and ZnO QD layers shows a significantly improved power conversion efficiency of 14.99% compared to the ZnO/Si solar cell (13.62%) and unmodified commercial c-Si solar cells (12.73%). This cost effective and environmentally friendly technology can be easily applied for the industrial scale production of Si solar cells.

中文翻译:

用于高性能ZnO / Si太阳能电池的高效纳米石墨电子传输层

光伏模块被认为是利用太阳能的最有效方法,而商用晶体硅(c-Si)太阳能电池的功率转换效率仍然有待提高。本文中,纳米石墨被设计为高性能ZnO / Si太阳能电池中的高效电子传输层,并通过简单的固溶相沉积和快速退火工艺制备。ZnO量子点可以通过产生更多的电子-空穴对扩大光谱响应的范围。多重激子效应。在n型ZnO QD层与n型Si和高导电性纳米石墨之间形成的内置场可以加速电子的收集和从n型Si到前电极的传输。因此,与ZnO / Si太阳能电池(13.62%)和未改性的商用c-Si太阳能电池(12.73%)相比,设计的具有纳米石墨层和ZnO QD层的Si太阳能电池的功率转换效率显着提高了14.99%。这种具有成本效益和环境友好的技术可以轻松地应用于硅太阳能电池的工业规模生产。
更新日期:2018-01-15
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