A-DA’D-A Type Pentacyclic Small Molecule Acceptors to Exceed 16.5%Efficiency by Heteroatom Effect at the Outer Side Chain
作者机构：State Key Laboratory of Powder MetallurgyCollege of Chemistry and Chemical EngineeringCentral South UniversityChangshaHunan 410083China Beiing National Laboratory for Molecular SciencesCAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China. MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationInternational Research Center for X PolymersDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhouZhejiang 310027China
出 版 物：《Chinese Journal of Chemistry》 (中国化学（英文版）)
年 卷 期：2023年第41卷第15期
页 面：1815-1822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）]
基 金：the National Natural Science Foundation of China(Nos.52125306,22005347,21875286) the Natural Science Foundation of Hunan Province(2021JJ20068) the Central South University Innovation-Driven Research Program(No.2023CXQD052)
主 题：Organic solar cells Small molecule acceptors A-DA'D-A type structure Heteroatom side chains Substituent effects
摘 要：Comprehensive Summary In this work,we adopt a“heteroatom side-chainsmodification strategy to modify the thiophene units in A-DA D-A(acceptor-donor-acceptor’-donor-acceptor)type pentacyclic SMAs(small molecule acceptors),that is,introducing branched alkyl chain at theβ-position of thiophene instead of straight alkyl chain,and then introducing oxygen atom at the third-position on the basis of branched *** new pentacyclic SMAs(BZ4F-EH and BZ4F-OEH)were synthesized,and the influence of the heteroatom side-chains on photoelectric properties of A-DA D-A type pentacyclic SMAs was systematically *** with our previously reported BZ4F(Y26),BZ4F-EH shows slightly blue-shifted absorption,while BZ4F-OEH has obvious red-shifted *** a result,BZ4F-OEH-based binary device achieved a high power conversion efficiency(PCE)of 16.56%with a fill factor(FF)of 79.3%,which is the highest efficiency of pentacyclic SMAs to date.
维普期刊数据库