Composition design of fullerene-based hybrid electron transport layer for efficient and stable wide-bandgap perovskite solar cells  

作　　者：Shuai Zeng Hui Wang Xiangyang Li Hailin Guo Linfeng Dong Chuanhang Guo Zhenghong Chen Jinpeng Zhou Yuandong Sun Wei Sun Liyan Yang Wei Li Dan Liu Tao Wang 

机构地区：[1]School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,Hubei,China [2]School of Materials and Microelectronics,Wuhan University of Technology,Wuhan 430070,Hubei,China [3]Key Laboratory of Textile Fiber and Products(Wuhan Textile University),Ministry of Education,Wuhan 430200,Hubei,China

出　　处：《Journal of Energy Chemistry》2025年第3期172-178,共7页能源化学(英文版)

基　　金：supported by the National Natural Science Foundation of China(22279098,52102295)。

摘　　要：Fullerene derivatives[6,6]-phenyl-C61-butyric acid methyl ester(PC_(61)BM)has been routinely used as the electron transport layer(ETL)in perovskite solar cells due to its suitable energy levels and good solution processability.However,its electron mobility and conductivity still need to be further enhanced for constructing high performance perovskite solar cells(PSCs).Herein,by doping the PC_(61)BM with a p-type polymer PM6 and n-type molecule ITIC,efficient wide-bandgap perovskite solar cells with improved efficiency and operational/storage stability are obtained.Further spectroscopy and electric measurements indicate PM6 and ITIC can both passivate defects at the perovskite/ETL interface,meanwhile ITIC can elevate the Fermi level of PC_(61)BM to enhance conductivity and PM6 can improve the photo-induced electron mobility of the ETL,facilitating charge extraction and reducing charge recombination.As the results,Cs_(0.17)FA_(0.83)Pb(I_(0.83)Br_(0.17))_(3)wide-bandgap PSCs with PM6:PC_(61)BM:ITIC as the ETL demonstrates a superior efficiency of 22.95%,compared to 20.89%of the PC_(61)BM assisted device.

关 键 词：Perovskite solar cells FULLERENE Electron transport layer Composition 

分 类 号：TM914.4[电气工程—电力电子与电力传动]