Alleviating hysteresis and improving device stability of perovskite solar cells via alternate voltage sweeps

The anomalous hysteresis in a perovskite solar cell induced by an asymmetric field is confirmed by a capacitance–voltage measurement. By applying several cycles of alternating reverse and forward scans, this hysteresis phenomenon is obviously alleviated, resulting in a hysteresis-less state in the p...

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Published inChinese physics B Vol. 26; no. 1; pp. 537 - 541
Main Author 夏超 宋伟东 张崇臻 袁松洋 胡文晓 秦萍 王汝鹏 赵亮亮 王幸福 何苗 李述体
Format Journal Article
LanguageEnglish
Published 2017
Subjects
器件
太阳电池
太阳能电池
扫描
滞后现象
电压测量
稳定性
钙钛矿型
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Summary:The anomalous hysteresis in a perovskite solar cell induced by an asymmetric field is confirmed by a capacitance–voltage measurement. By applying several cycles of alternating reverse and forward scans, this hysteresis phenomenon is obviously alleviated, resulting in a hysteresis-less state in the perovskite solar cell. Meanwhile, the open-circuit voltage and power conversion efficiency of the perovskite solar cell are enhanced by 55.74% and 61.30%, respectively, while the current density and fill factor keep almost invariable. The operation of alleviating hysteresis is essential for further research and is likely to bring in performance gains.
Bibliography:Chao Xia1,Wei-Dong Song1,Chong-Zhen Zhang1,Song-Yang Yuan1,Wen-Xiao Hu1,Ping Qin1,Ru-Peng Wang1,Liang-Liang Zhao1,Xing-Fu Wang1,Miao He1,Shu-Ti Li1,2（1. Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, Institute of Opto-electronic Materials and Technology, South China Normal University, Guangzhou 510631, China; 2. Guangdong Engineering Research Center of Optoelectronic Functional Materials and Devices, Institute of Opto-electronic Materials and Technology, Guangzhou 510631, China）
11-5639/O4
perovskite solar cells; hysteresis behavior; alternate voltage sweeps; built-in electric field
The anomalous hysteresis in a perovskite solar cell induced by an asymmetric field is confirmed by a capacitance–voltage measurement. By applying several cycles of alternating reverse and forward scans, this hysteresis phenomenon is obviously alleviated, resulting in a hysteresis-less state in the perovskite solar cell. Meanwhile, the open-circuit voltage and power conversion efficiency of the perovskite solar cell are enhanced by 55.74% and 61.30%, respectively, while the current density and fill factor keep almost invariable. The operation of alleviating hysteresis is essential for further research and is likely to bring in performance gains.
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/26/1/018401