Enhancement of the efficiency and stability of planar p-i-n perovskite solar cells via incorporation of an amine-modified fullerene derivative as a cathode buffer layer  

作　　者：Xiaodong Liu Peng Huang Qingqing Dong Zhaowei Wang Kaicheng Zhang Hao Yu Ming Lei Yi Zhou Bo Song Yongfang Li 

机构地区：[1]Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China [2]Department of Chemistry, Zhejiang University, Hangzhou 310027, China [3]Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China

出　　处：《Science China Chemistry》2017年第1期136-143,共8页中国科学（化学英文版）

基　　金：the National Natural Science Foundation of China(21204054,51303118,91333204);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：A methanol-soluble diamine-modified fullerene derivative(denoted as PCBDANI)was applied as an efficient cathode buffer layer(CBL)in planar p-i-n perovskite solar cells(pero-SCs)based on the CH_3NH_3PbI_(3-x)Cl_x absorber.The device with PCBDANI single CBL exhibited significantly improved performance with a power conversion efficiency(PCE)of 15.45%,which is approximately17%higher than that of the control device without the CBL.The dramatic improvement in PCE can be attributed to the formation of an interfacial dipole at the PCBM/Al interface originating from the amine functional group and the suppression of interfacial recombinationby the PCBDANI interlayer.To further improve the PCE of pero-SCs,PCBDANI/LiF double CBLs were introduced between PCBM and the top Al electrode.An impressive PCE of 15.71%was achieved,which is somewhat higher than that of the devices with LiF or PCBDANI single CBL.Besides the PCE,the long-term stability of the device with PCBDANI/LiF double CBLs is also superior to that of the device with LiF single CBL.A methanol-soluble diamine-modified fullerene derivative（denoted as PCBDANI）was applied as an efficient cathode buffer layer（CBL）in planar p-i-n perovskite solar cells（pero-SCs）based on the CH3NH3PbI3-xClx absorber.The device with PCBDANI single CBL exhibited significantly improved performance with a power conversion efficiency（PCE）of 15.45%,which is approximately17%higher than that of the control device without the CBL.The dramatic improvement in PCE can be attributed to the formation of an interfacial dipole at the PCBM/Al interface originating from the amine functional group and the suppression of interfacial recombinationby the PCBDANI interlayer.To further improve the PCE of pero-SCs,PCBDANI/LiF double CBLs were introduced between PCBM and the top Al electrode.An impressive PCE of 15.71%was achieved,which is somewhat higher than that of the devices with LiF or PCBDANI single CBL.Besides the PCE,the long-term stability of the device with PCBDANI/LiF double CBLs is also superior to that of the device with LiF single CBL.

关 键 词：planar p-i-n perovskite solar cells cathode buffer layers amine-modified fullerene derivative PCBDANI/LiF double CBLs stability 

分 类 号：TM914.4[电气工程—电力电子与电力传动]