Full-scale chemical and field-effect passivation:21.52% efficiency of stable MAPbI_(3) solar cells via benzenamine modification  

作　　者：Fengyou Wang Meifang Yang Yuhong Zhang Jinyue Du Shuo Yang Lili Yang Lin Fan Yingrui Sui Yunfei Sun Jinghai Yang 

机构地区：[1]Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education,Jilin Normal University,Changchun 130103,China [2]National Demonstration Center for Experimental Physics Education,Jilin Normal University,Siping 136000,China [3]Key Laboratory of Preparation and Application of Environmental Friendly Materials,Ministry of Education,Jilin Normal University,Changchun 130103,China [4]College of Science,Changchun University,Changchun 130022,China

出　　处：《Nano Research》2021年第8期2783-2789,共7页纳米研究（英文版）

基　　金：support from the National Natural Science Foundation of China(Nos.61775081,11904127,22075101,61904066,61705020);Program for the Development of Science and Technology of Jilin Province(Nos.20200801032GH and 20190103002JH);the Thirteenth Five-Year Program for Science and Technology of Education Department of Jilin Province(Nos.JJKH20200417KJ);Special Project of Industrial Technology Research and Development in Jilin Province(No.2019C042-2);Construction Program for Innovation Research Team of Jilin Normal University(No.201703).

摘　　要：Organic-inorganic metal halide perovskite solar cells have achieved high efficiency of 25.5%.Finding an effective means to suppress the formation of traps and correlate stability losses are thought to be a promising route for further increasing the photovoltaic performance and commercialization potential of perovskite photovoltaic devices.Herein,we report a facile passivation model,which uses a multi-functional organic molecule to simultaneously realize the chemical passivation and field-effect passivation for the perovskite film by an upgraded anti-solvent coating method,which reduces the trap states density of the perovskite,improves interface charge transfer,and thus promotes device performance.In addition,the hydrophobic groups of the molecules can form a moisture-repelling barrier on the perovskite grains,which apparently promotes the humidity stability of the solar cells.Therefore,the optimal power conversion efficiency(PCE)of perovskite solar cells after synergistic passivation reaches 21.52%,and it can still retain 95%of the original PCE when stored in-40%humidity for 30 days.Our findings extend the scope for traps passivation to further promote both the photovoltaic performance and the stability of the perovskite solar cells.

关 键 词：chemical passivation ANTI-SOLVENT MAPbI_(3)solar cells recombination charge transfer 

分 类 号：O61[理学—无机化学]