Miscibility screening promotes the efficiency and stability of P3HT-based organic solar cells Special Issue:Emerging Investigators  

作　　者：Kaihu Xian Ruijie Ma Kangkang Zhou Junwei Liu Mengyuan Gao Wenchao Zhao Miaomiao Li Yanhou Geng Long Ye 

机构地区：[1]School of Materials Science and Engineering,Tianjin Key Laboratory of Molecular Optoelectronic Sciences,Collaborative Innovation Center of Chemical Science and Engineering,Tianjin University,Tianjin,China [2]Department of Electronic and Information Engineering,Research Institute for Smart Energy(RISE),Guangdong-Hong Kong-Macao(GHM)Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices,The Hong Kong Polytechnic University,Kowloon,China [3]Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,College of Materials Science and Engineering,Nanjing Forestry University,Nanjing,China [4]Joint School of National University of Singapore and Tianjin University,International Campus of Tianjin University,Fuzhou,China [5]Hubei Longzhong Laboratory,Xiangyang,China

出　　处：《Aggregate》2024年第2期414-422,共9页聚集体（英文）

基　　金：National Natural Science Foundation of China,Grant/Award Numbers:52073207,52121002;Open Fund of the Hubei Longzhong Laboratory,Grant/Award Number:2022KF-01;Peiyang Scholar Program of Tianjin University;PolyU Distinguished Postdoctoral Fellowship,Grant/Award Number:1-YW4C;Shanghai Synchrotron Radiation Facility;Fundamental Research Funds for the Central Universities;Beijing Synchrotron Radiation Facility。

摘　　要：The power conversion efficiency of organic photovoltaics(OPVs)has witnessed continuous breakthroughs in the past few years,mostly benefiting from the extensive use of a facile ternary blending strategy by blending the host polymer donor:small molecule acceptor mixture with a second small molecule acceptor.Nevertheless,this rather general strategy used in the well-known PM6 systems fails in constructing high-performance P3HT-based ternary OPVs.As a result,the efficiencies of all resulting ternary blends based on a benchmark host P3HT:ZY-4Cl and a second acceptor are no more than 8%.Employing the mutual miscibility of the binary blends as a guide to screen the second acceptor,here we were able to break the longstanding 10%-efficiency barrier of ternary OPVs based on P3HT and dual nonfullerene acceptors.With this rational approach,we identified a multifunctional small molecule acceptor BTP-2Br to simultaneously improve the photovoltaic performance in both P3HT and PM6-based ternary OPVs.Attractively,the P3HT:ZY-4Cl:BTP-2Br ternary blend exhibited a record-breaking efficiency of 11.41%for P3HT-based OPVs.This is the first-ever report that over 11%efficiency is achieved for P3HTbased ternary OPVs.Importantly,the study helps the community to rely less on trial-and-error methods for constructing ternary solar cells.

关 键 词：CRYSTALLIZATION MISCIBILITY organic photovoltaics phase separation POLYTHIOPHENE 

分 类 号：O63[理学—高分子化学]