Improved interfacial property by small molecule ethanediamine for high performance inverted planar perovskite solar cells

查看全文 作　　者：Guodong [1,2]Zhang;Yunxin [2]Zhang;Siqi [2]Chen;Hao [2]Chen;Le [2]Liu;Wenming [1]Ding;Jinhui [1]Wang;Anyu [1]Zhang;Shuping [2]Pang;Xin [3]Guo;Lianqing [1]Yu;Tonggang [2]Jiu 机构地区：[1]School of Materials Science and Engineering,China University of Petroleum,Qingdao 266580,Shandong,China;[2]Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences,Qingdao 266101,Shandong,China;[3]Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,Liaoning,China 出　　处：《Journal of Energy Chemistry》索引2021年第30卷第3期,共8页 基　　金：supported by the National Natural Science Foundation of China(51672288,21975273);Taishan Scholars Program of Shandong Province,Dalian National Laboratory for Clean Energy(DICP&QIBEBT No.UN201705);Scientific Research Cooperation Foundation of Qingdao Institute of Bioenergy and Bioprocess Technology;Qingdao Postdoctoral Application Research Project(Project 2018183,2018186)。 摘　　要：We report a simple and effective method to realize desirable interfacial property for inverted planar perovskite solar cells(PSCs)by using small molecule ethanediamine for the construction of a novel polyelectrolyte hole transport material(P3CT-ED HTM).It is found that P3CT-ED can not only improve the hole transport property of P3CT-K but also improve the crystallinity of adjacent perovskite film.In addition,the introduction of ethanediamine into P3CT realigns the conduction and valence bands upwards,passivates surface defects and reduces nonradiative recombination.As a consequence,compared to P3CT-K hole transport layer(HTL)based devices,the average power conversion efficiency(PCE)is boosted from17.2% to 19.6% for the counterparts with P3CT-ED,with simultaneous enhancement in open circuit voltage and fill factor.The resultant device displays a champion PCE of 20.5% with negligible hysteresis. 关 键 词：Improved interfacial property Inverted planar perovskite solar cells Passivated trap states Crystallinity Ethanediamine