Unraveling Passivation Mechanism of Imidazolium-Based Ionic Liquids on Inorganic Perovskite to Achieve Near-Record-Efficiency CsPbI2Br Solar Cells

Nano-Micro Letters

Baomin Xu¹  Wanli Ma²  Jian Cui³  Dongfang Xu³  Shaomin Yang³  Yuhang Che³  Wenjing Zhao³  Chenyang Duan³  Zhike Liu³  Yu Han³  Jie Xu³  Xi Guo³  Shengzhong Liu⁴  Kunpeng Guo⁵  Jianxi Yao⁶ 

[1] Department of Materials Science and Engineering and Shenzhen Engineering Research and Development Center for Flexible Solar Cells, Southern University of Science and Technology, 518055, Shenzhen, People’s Republic of China;Institute of Functional Nano & Soft Materials, Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, 215123, Suzhou, People’s Republic of China;Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices; Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, 710119, Xi’an, People’s Republic of China;Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices; Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, 710119, Xi’an, People’s Republic of China;Dalian Institute of Chemical Physics, iChEM, University of Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, 116023, Dalian, People’s Republic of China;Ministry of Education Key Laboratory of Interface Science and Engineering in Advanced Materials, Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, 030024, Taiyuan, People’s Republic of China;State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources, North China Electric Power University, 102206, Beijing, People’s Republic of China;

关键词: Ionic liquids;    Inorganic perovskite;    Imidazolium;    Passivation;    High efficiency;   

DOI  :  10.1007/s40820-021-00763-8

来源: Springer

【 摘 要 】

tsA series of 10 imidazolium-based ionic liquids (IILs) with different cations and anions have applied to unravel the passivation mechanism of the IILs on CsPbI2Br inorganic perovskites.It is found that anions of IILs play a more important role in passivation of lead- and cesium-related defects in inorganic perovskite compared with imidazole cations because they can form strong ionic interactions (Pb-F, Cs-F).A high-power conversion efficiency of 17.02% is obtained, which is among the highest values of CsPbI2Br-based perovskite solar cells.

【 授权许可】

CC BY