Improving current and mitigating energy loss in ternary organic photovoltaics enabled by two well-compatible small molecule acceptors

作     者：Yanna Sun Huan-Huan Gao Simin Wu Lingxian Meng Xiangjian Wan Mengyang Li Zaifei Ma Ziqi Guo Shitong Li Hongtao Zhang Chenxi Li Yongsheng Chen Yanna Sun;Huan-Huan Gao;Simin Wu;Lingxian Meng;Xiangjian Wan;Mengyang Li;Zaifei Ma;Ziqi Guo;Shitong Li;Hongtao Zhang;Chenxi Li;Yongsheng Chen

作者机构：State Key Laboratory and Institute of Elemento-Organic ChemistryThe Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer MaterialsInstitute of Polymer ChemistryRenewable Energy Conversion and Storage CenterCollege of ChemistryNankai UniversityTianjin 300071China Center for Advanced Low-dimension MaterialsStage Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2021年第64卷第4期

页      面：608-615页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：supported by the National Key Research and Development Program of China(2019YFA0705900,2016YFA0200200) the National Natural Science Foundation of China(21935007,51873089,51773095) Tianjin city(20JCZDJC00740,17JCJQJC44500) 111 Project(B12015) 

主　　题：organic photovoltaics ternary devices small molecule acceptors film morphology energy loss 

摘      要：Ternary organic photovoltaic(OPV)strategy is an effective but facile approach to enhance the photovoltaic performance for single-junction ***,a series of ternary OPVs were fabricated by employing a wide bandgap donor(PBDB-TF)and two acceptor-donor-acceptor(A-D-A)-type nonfullerene small molecule acceptors(NF-SMAs,called F-2 Cl and 3 TT-OCIC).As the third component,the near-infrared SMA,3 TT-OCIC,has complementary absorption spectrum,narrow bandgap and wellcompatible crystallization property to the host acceptor(F-2 Cl)for efficient ternary *** these,the optimal ternary devices yield significantly enhanced power conversion efficiency of 15.23%,one of the very few examples with PCE higher than15%other than Y6 *** is mainly attributed to the increased short-circuit current density of 24.92 m A cm^(-2) and dramatically decreased energy loss of 0.53 e *** work presents a successful example for simultaneously improving current,minimizing energy loss and together with modifying the morphology of active layers in OPVs,which will contribute to the further construction of high performance ternary OPVs.