高等学校化学学报2023，Vol.44Issue(7)：32-42,11.DOI:10.7503/cjcu20230068
烷基链支化位点对全稠环小分子受体聚集的影响
Effect of Alkyl-chain Branching Position on Molecular Aggregation of All-fused-ring Molecules
摘要
Abstract
All-fused-ring molecules are a novel type of electron acceptor materials with excellent intrinsic stability for organic solar cell(OSC)applications.In this work,we developed two all-fused-ring small molecular acceptors,FM5 and FM6,with different branching positions of alkyl chains on the pyrrole motif.The effects of branching points of the alkyl chains on optical and electronic properties,molecular stacking of the molecules were investigated.Compared with FM5 with 2nd-position branched alkyl chains,FM6 with 3rd-position branched alkyl chains exhibits the blue-shifted absorption and higher crystallinity.Due to the large steric hindrance caused by alkyl chains at 2nd branching sites,FM5 exhibits appropriate molecular aggregation and thus favorable film morphology in the blend film.Due to the suitable blend film morphology,the OSC device using FM5 as electron acceptor exhibits a power conversion efficiency(PCE)of 9.03%,which is higher than that of FM6(6.67%).These results demonstrate that the side chain engineering is an effective strategy for tuning the molecular aggregation,crystalline and blend film morphology for all-fused-ring molecules.关键词
全稠环分子/有机太阳能电池/电子受体/薄膜形貌/烷基链支化位点Key words
All-fused-ring molecule/Organic solar cell/Electron acceptor/Film morphology/Branching positions of alkyl chain分类
化学化工引用本文复制引用
张永倩,朱小玉,苗俊辉,刘俊,王利祥..烷基链支化位点对全稠环小分子受体聚集的影响[J].高等学校化学学报,2023,44(7):32-42,11.基金项目
吉林省自然科学基金(批准号:20230101122JC)、国家自然科学基金(批准号:22135007,52073281),国家重点研发计划项目(批准号:2019YFA0705900)资助.Supported by the Natural Science Foundation of Jilin Province,China(No.20230101122JC),the National Natural Science Foundation of China(Nos.22135007,52073281)and the National Key Research and Development Program of China(No.2019YFA0705900). （批准号:20230101122JC）
