Enhancing photovoltaic performance via aggregation dynamics control in fused-ring electron acceptor

作     者：Jiayu Wang Runyu Zhu Shijie Wang Yawen Li Boyu Jia Jiadong Zhou Peiyao Xue Susanne Seibt Yuze Lin Zengqi Xie Wei Ma Xiaowei Zhan 

作者机构：Department of Materials Science and EngineeringCollege of EngineeringKey Laboratory of Polymer Chemistry and Physics of Ministry of EducationPeking UniversityBeijingChina State Key Laboratory for Mechanical Behavior of MaterialsXi’an Jiaotong UniversityXi’anChina Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijingChina Institute of Polymer Optoelectronic Materials and DevicesState Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhouChina Australian SynchrotronClaytonVictoriaAustralia 

出 版 物：《Aggregate》 (聚集体(英文))

年 卷 期：2021年第2卷第3期

页      面：1-8页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0807[工学-动力工程及工程热物理] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0814[工学-土木工程] 

基　　金：National Science Foundation of China Grant/Award Numbers:51761165023 21734001 

主　　题：aggregation dynamics fused-ring electron acceptor nonfullerene acceptor organic solar cell 

摘      要：A new fused-ring electron acceptor FNIC3 with dynamics controlled aggregation behavior was ***3 shows strong absorption in 600–900 nm,HOMO/LUMO energy levels of−5.59/−4.04 eV,and electron mobility of 1.2×10^(−3) cm^(2) V^(−1) s^(−1).The aggregation of FNIC3 shows strong dependency on film formation *** of film formation time promotes the crystallization of FNIC3,leading to improved crystallinity and enlarged aggregate *** of FNIC3 significantly influences the photovoltaic device *** aggregation red-shifts the absorption and improves the mobilities of the blend,which contributes to high photocurrent and fill factor thus high power conversion efficiency(PCE).Overaggregation leads to increased nonradiative energy loss and insufficient charge generation,resulting in decreased open-circuit voltage and short-circuit current *** blends based on PM6:FNIC3 fabricated under proper film formation time exhibit a PCE of 12.3%,higher than those fabricated under short and long film formation time(10.0–10.5%).