A carbon-oxygen-bridged ladder-type building block for efficient donor and acceptor materials used in organic solar cells  

作　　者：Zuo Xiao Fan Liu Xinjian Geng Jianqi Zhang Shizhe Wang Yujun Xie Zhen Li Huai Yang Yongbo Yuan Liming Ding 

机构地区：[1]Center for Excellence in Nanoscience (CAS),Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS),National Center for Nanoscience and Technology [2]Department of Chemistry,Wuhan University [3]College of Engineering,Peking University [4]School of Physics & Electronics,Central South University

出　　处：《Science Bulletin》2017年第19期1331-1336,共6页科学通报（英文版）

基　　金：supported by the National Natural Science Foundation of China (U1401244, 21374025, 21372053, 21572041, and 51503050);the National Natural Science Foundation of China (51673218) for financial support;the National Key Research and Development Program of China (2017YFA0206600);the State Key Laboratory of Luminescent Materials and Devices (2016-skllmd-05);the Youth Association for Promoting Innovation (CAS)

摘　　要：A carbon-oxygen-bridged ladder-type donor unit （CO5） was invented and prepared via an ＂intramolecu- lar demethanolization cyclization＂ approach. Its single crystal structure indicates enhanced planarity compared with the carbon-bridged analogue indacenodithiophene （IDT）. Owing to the stronger electron-donating capability of CO5 than IDT, CO5-based donor and acceptor materials show narrower bandgaps. A donor-acceptor （D-A） copolymer donor （PCO5TPD） and an A-D-A nonfullerene acceptor （COSIC） demonstrated higher performance than IDT-based counterparts, PIDTTPD and IDTIC, respec-tively. The better performance of CO5-based materials results from their stronger light-harvesting capability and higher charge-carrier mobilities.A carbon-oxygen-bridged ladder-type donor unit(CO5) was invented and prepared via an ‘‘intramolecular demethanolization cyclization" approach. Its single crystal structure indicates enhanced planarity compared with the carbon-bridged analogue indacenodithiophene(IDT). Owing to the stronger electron-donating capability of CO5 than IDT, CO5-based donor and acceptor materials show narrower bandgaps. A donor-acceptor(D-A) copolymer donor(PCO5TPD) and an A-D-A nonfullerene acceptor(CO5IC) demonstrated higher performance than IDT-based counterparts, PIDTTPD and IDTIC, respectively. The better performance of CO5-based materials results from their stronger light-harvesting capability and higher charge-carrier mobilities.

关 键 词：Ladder-type unitsCyclization reactionPlanarityCharge-carrier mobilityOrganic solar cells 

分 类 号：TM914.4[电气工程—电力电子与电力传动]