A Non-Fullerene Acceptor with Chlorinated Thienyl Conjugated Side Chains for High-Performance Polymer Solar Cells via Toluene Processing  

作　　者：Cuangwei Li Jingnan Wu Jin Fang Xia Guo Lei Zhu Feng Liu Maojie Zhang Yongfang Li 

机构地区：[1]Laboratory of Advanced Optoelectronic Materials,College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou,Jiangsu 215123,China [2]Department of Physics and Astronomy and Collaborative Innovation Center of IFSA(CICIFSA),Shanghai Jiao Tong University,Shanghai 200240,China [3]Beijing National Laboratory for Molecular Sciences,CAS Key Laboratory of Organic Solids,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Chinese Journal of Chemistry》2020年第7期697-702,共6页中国化学（英文版）

基　　金：the National Natural Science Foundation of China(NSFC)(Nos.51503135,51573120,21734009 and 91633301);Jiangsu Provincial Natural Science Foundation(Grant No.BK20150332);Collaborative Innovation Center of Suzhou Nano Science&Technology;The GIWAXS and RSoXS of this research were carried out at beamline 7.3.3 and 11.0.1.2 at the Advanced Light Source,Molecular Foundry;National Center for Electron Microscopy,Lawrence Berkeley National Laboratory,which was supported by the DOE,Office of Science,and Office of Basic Energy Sciences.

摘　　要：Small molecular acceptors(SMAs)BTC-2F and BTH-2F,based on heptacyclic benzodi(cyclopentadithiophene)electron-donating core(CBT)with chlorinated-thienyl conjugated and thienyl conjugated side chains,respectively,are designed and synthesized.Compared with non-chlorine acceptor BTH-2F,BTC-2F exhibits slightly blue-shifted absorption spectra,similar the lowest unoccupied molecular orbital(LUMO)(-3.91 eV);deeper highest occupied molecular orbital(HOMO)energy level and higher electron mobility than that of BTH-2F.PM6,a wide bandgap polymer,is selected as the donor material to construct bulk heterojunction polymer solar cells processed with nonhalogenated solvent toluene.The optimized PM6:BTC-2F-based device presents a 12.9%power conversion efficiency(PCE),while the PCE of PM6:BTH-2F-based device is only 11.3%.The results suggest that it is an effective strategy to optimize the photoelectric properties of SMAs by incorporating chlorine atom into the conjugated side chains.

关 键 词：CONJUGATED CHLORINE chains 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TQ317[化学工程—高聚物工业]