钙钛矿(结构)
材料科学
纳米晶材料
钙钛矿太阳能电池
无定形固体
钨
图层(电子)
能量转换效率
溶解过程
太阳能电池
光电子学
化学工程
纳米技术
化学
结晶学
冶金
工程类
作者
Cong Chen,Yue Jiang,Yehui Wu,Jiali Guo,Xiangyu Kong,Xiaoyin Wu,Yuzhu Li,Dongfeng Zheng,Sujuan Wu,Xingsen Gao,Zhipeng Hou,Guofu Zhou,Yiwang Chen,Junming Liu,Krzysztof Kempa,Jinwei Gao
出处
期刊:Solar RRL
[Wiley]
日期:2020-01-31
卷期号:4 (4)
被引量:36
标识
DOI:10.1002/solr.201900499
摘要
Low‐temperature, solution‐processed metal oxides are of great interest as alternative materials for electron transport layers in perovskite solar cells. WO x is a promising candidate that could truly enable low‐temperature (<100 °C) processing. However, its amorphous‐state form typically obtained with the solution process suffers from high defect density. This causes large charge recombination, and consequently significant deterioration of the solar cell efficiency. Herein, an ultra‐low‐temperature processed (50 °C) nanocrystalline WO x as the electron transport layer, free of this problem, is demonstrated. This material is obtained by the reaction of tungsten chloride with hexanol, which induces transformation of the precursor solution into stable colloidal particles. The best solar cell, with the WO x electron transport layer, achieved an efficiency of 20.77%, which is a record performance for this class of perovskite solar cells.
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