Liquid medium annealing for fabricating durable perovskite solar cells with improved reproducibility
Nengxu Li(Beijing Institute of Technology), Xiuxiu Niu(Beijing Institute of Technology), Liang Li(Ministry of Education), Hao Wang(Beijing Institute of Technology), Zijian Huang(Ministry of Education), Yü Zhang(Ministry of Education), Yihua Chen(Ministry of Education), Xiao Zhang(Beijing Institute of Technology), Cheng Zhu(Beijing Institute of Technology), Huachao Zai(Ministry of Education), Yang Bai(Beijing Institute of Technology), Sai Ma(Beijing Institute of Technology), Huifen Liu(Ministry of Education), Xixia Liu(Ministry of Education), Zhenyu Guo(Ministry of Education), Guilin Liu(Jiangnan University), Rundong Fan(Ministry of Education), Hong Chen(Nanjing Tech University), Jianpu Wang(Nanjing Tech University), Yingzhuo Lun(Beijing Institute of Technology), Xueyun Wang(Beijing Institute of Technology), Jiawang Hong(Beijing Institute of Technology), Haipeng Xie(Central South University), Devon S. Jakob(Lehigh University), Xiaoji G. Xu(Lehigh University), Qi Chen(Beijing Institute of Technology), Huanping Zhou(Ministry of Education)
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Abstract
Evening out the heat The conversion of precursors into the active layer of perovskite solar cells normally occurs by heating the underlying substrate. Conversion tends to occur near the top of the film, where solvent is lost, and unwanted preheating of reactants occurs near the substrate before the reaction. Li et al . show that the use of a surrounding heat transfer oil (anisole) leads to more rapid and even heating, removes solvent, and avoids air and water contamination effects. The larger grains and more uniform films led a much greater retention of efficiency in moving from small-area to large-area devices. —PDS
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