Fullerenes and derivatives as electron transport materials in perovskite solar cells  

作　　者：Kaicheng Zhang Hao Yu Xiaodong Liu Qingqing Dong Zhaowei Wang Yaofeng Wang Ning Chen Yi Zhou Bo Song 

机构地区：[1]Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China

出　　处：《Science China Chemistry》2017年第1期144-150,共7页中国科学（化学英文版）

基　　金：the National Natural Science Foundation of China(51303118,91333204);the Natural Science Foundation of Jiangsu Province(BK20130289);the Ph.D.Programs Foundation of Ministry of Education of China(20133201120008);the Priority Academic Program Development of Jiangsu Higher Education Institutions;the Scientific Research Foundation for Returned Scholars,Ministry of Education of China;Beijing National Laboratory for Molecular Sciences,State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials

摘　　要：In this study,two fullerenes(C60,C70)and their methano-substitutions(PC61BM,PC71BM),as electron transport materials(ETMs)in perovskite solar cells(Pero-SCs),were systematically studied.As being used as ETMs,methanofullerenes,though with lower electron mobility compared to the counterpart pristine fullerenes,lead to higher power conversion efficiencies(PCEs)of Pero-SCs.The difference is likely caused by the fill-out vacancies and smoother morphology of the interfaces between ETM and perovskite layers,as they were prepared by different methods.In addition,compared to C60 and PC61BM,C70 and PC71BM showed priority in terms of short-circuit current density,which should be attributed to fast free charge extraction abilities.In this study,two fullerenes（C60,C70）and their methano-substitutions（PC61BM,PC71BM）,as electron transport materials（ETMs）in perovskite solar cells（Pero-SCs）,were systematically studied.As being used as ETMs,methanofullerenes,though with lower electron mobility compared to the counterpart pristine fullerenes,lead to higher power conversion efficiencies（PCEs）of Pero-SCs.The difference is likely caused by the fill-out vacancies and smoother morphology of the interfaces between ETM and perovskite layers,as they were prepared by different methods.In addition,compared to C60 and PC61BM,C70 and PC71BM showed priority in terms of short-circuit current density,which should be attributed to fast free charge extraction abilities.

关 键 词：perovskite solar cells pristine fullerenes methanofullerenes vacuum-evaporation solution-processed 

分 类 号：O613.71[理学—无机化学] TM914.4[理学—化学]