高等学校化学学报2026，Vol.47Issue(4)：111-121,11.DOI:10.7503/cjcu20250324
基于给/受体双重相似性"桥联"聚合物受体的侧链工程构筑高性能三元有机太阳能电池
Side-chain Engineering of"Bridging"Polymer Acceptors with Donor/Acceptor Dual Similarity for High-performance Ternary Organic Solar Cells
摘要
Abstract
The morphology of active layer plays a critical role in determining the photovoltaic performance of organic solar cells(OSCs).However,binary blends often suffer from suboptimal phase separation,which limits the efficiency of OSCs.Herein,two bridging polymer acceptors(PAs)——benzodithiophene-(2-ethylhexyl)oxy(BDT-C2C4)and benzodithiophene-octyloxy(BDT-C8)——are designed and synthesized by combining a benzodithiophene(BDT)unit as the donor moiety[poly({4,8-bis[5-(2-ethylhexyl)-4-fluorothiophen-2-yl]benzo[1,2-b:4,5-b']dithiophene-2,6-diyl}){5,8-bis[4-(2-butyloctyl)thiophen-2-yl]dithieno[3',2':3,4]},D18],and a 2,2′-((2Z,2′Z)-{[12,13-Bis(2-butyloctyl)-12,13-dihydro-3,9-dinonylthieno[2,3]thieno[3,2-b]pyrrolo[4,5-g]thieno[2,3-b]indole-2,10-diyl]bis(methanylylidene)}bis(3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile(Y6)derivative as the acceptor moiety.BDT-C2C4 and BDT-C8 are functionalized with(2-ethylhexyl)oxy and octyloxy side chains on the BDT unit,respectively.Both PAs show complementary absorption and cascaded energy levels with the donor D18 and the acceptor 2,2′-((2Z,2′Z){-[12,13-bis(3-ethylheptyl)-3,9-diundecyl-12,13-dihydro-[1,2,5]thiadiazolo[3,4-e]thieno[2″,3″∶4′,5′]thieno[2′,3′∶4,5]pyrrolo[3,2-g]thieno[2′,3′∶4,5]thieno[3,2-b]indole-2,10-diyl]bis(meth-aneylylidene)}bis(5,6-difluoro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile(N3),but BDT-C8 exhibits better compatibility with D18 and N3 compared to BDT-C2C4.When incorporated as a third component into the D18∶N3 blend,both PAs improve the active layer morphology.In particular,the D18∶N3∶BDT-C8 blend shows significantly optimized morphology,featuring reduced phase separation and a fibrous network structure.As a result,the device based on D18∶N3∶BDT-C8 achieves a power conversion efficiency of 18.18%,significantly higher than that of the device based on D18∶N3(ca.17.37%).This work presents a compatibilizer strategy for optimizing blend morphology towards high-performance ternary OSCs.关键词
有机太阳能电池/三元策略/聚合物受体/活性层形貌Key words
Organic solar cell/Ternary strategy/Polymer acceptor/Active layer morphology分类
化学化工引用本文复制引用
刘苗苗,丁自成,韩艳春,傅梦然,高蝶,张万鹏,梁莹,何媛媛,赵巧巧,赵廷兴,李鸿波..基于给/受体双重相似性"桥联"聚合物受体的侧链工程构筑高性能三元有机太阳能电池[J].高等学校化学学报,2026,47(4):111-121,11.基金项目
山东省自然科学基金(批准号:ZR2022QE135)、国家自然科学基金(批准号:52203024)、山东省高等学校"青创团队计划"(批准号:2023KJ330)、全国重点实验室建设重大科研专项(批准号:2025ZDGZ02)、西南科技大学博士基金(批准号:22zx7129)及四川省自然科学基金(批准号:2024NSFSC2006)资助. Supported by the Shandong Provincial Natural Science Foundation,China(No.ZR2022QE135),the National Natural Science Foundation of China(No.52203024),the Youth Innovation Team Project of Shandong Provincial University,China(No.2023KJ330),the Major Scientific Research Project for the Construction of State Key Lab,China(No.2025ZDGZ02),the Doctoral Research Foundation of SWUST,China(No.22zx7129)and the Natural Science Foundation of Sichuan Province of China(No.2024NSFSC2006). （批准号:ZR2022QE135）
