Defect passivation strategy for inorganic CsPbI2Br perovskite solar cell with a high-efficiency of 16.77%

作     者：Hua Zhang Jia Zhuang Xingchong Liu Zhu Ma Heng Guo Ronghong Zheng Shuangshuang Zhao Fu Zhang Zheng Xiao Hanyu Wang Haimin Li Hua Zhang;Jia Zhuang;Xingchong Liu;Zhu Ma;Heng Guo;Ronghong Zheng;Shuangshuang Zhao;Fu Zhang;Zheng Xiao;Hanyu Wang;Haimin Li

作者机构：School of New Energy and MaterialsSouthwest Petroleum UniversityChengdu610500China Institute of PhotovoltaicSouthwest Petroleum UniversityChengdu610500China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2021年第82卷第23期

页      面：40-46页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：supported by the National Key R&D Program of China(2016YFB0303602) Sichuan and Technology Program(Grant No.2018JY0015) Yong Science and Technology Innovation Team Project of SWPU(No.2019CXTD04) 

主　　题：All-inorganic perovskite CsPbI2Br Defect passivation Pb-O bond High PCE 

摘      要：All-inorganic halide perovskite solar cells(PSCs)have acquired great progress,especially ***,their photoelectric conversion efficiency(PCE)remains far below the theoretical ***-radiative recombination is one of the important issues affecting the photoelectric performance of the PSCs,and the defective lead ions derived from the evaporation of halide ions in the inorganic perovskite are the principal non-radiative recombination ***,the non-radiative recombination is effectively suppressed by introducing the N-methyl-2-pyrrolidone(NMP)as a Lewis base molecule to passivate the defective lead ***,by adjusting the dosage of NMP,the smooth and pinhole-free CsPbI_(2)Br perovskite film is obtained and the optimized device exhibits a champion PCE of 16.77%with an excellent fill factor(FF)of *** work proves the effectiveness of passivation using Lewis base molecules to prevent non-radiative recombination defects in inorganic perovskite.