Through-space charge transfer blue polymers containing acridan donor and oxygen-bridged triphenylboron acceptor for highly efficient solution-processed organic light-emitting diodes  

作　　者：Fan Chen Jun Hu Xingdong Wang Shiyang Shao Lixiang Wang Xiabin Jing Fosong Wang 

机构地区：[1]State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China [2]School of Applied Chemistry and Engineering,University of Science and Technology of China,Hefei 230026,China

出　　处：《Science China Chemistry》2020年第8期1112-1120,共9页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China(51833009,21975247,51573182);the National Program on Key Basic Research Project of China(2015CB655000);the Youth Innovation Promotion Association of Chinese Academy of Sciences(2015180)。

摘　　要：Three kinds of through-space charge transfer(TSCT)blue polymers containing non-conjugated polystyrene backbone together with spatially-separated acridan donor and oxygen-bridged triphenylboron acceptors having different substituents of tert-butyl,hydrogen and fluorine are designed and synthesized.The designed TSCT blue polymers possess photoluminescence quantum yields up to 70%in solid-state film,single-triplet energy splitting below 0.1 eV,and typical thermally activated delayed fluorescence(TADF)effect.Meanwhile,the resulting polymers exhibit aggregation-induced emission(AIE)effect with emission intensity increased by up to^27 folds from solution to aggregation state.By changing the substituent of acceptors to tune the charge transfer strength,blue emission with peaks from 444 to 480 nm can be realized for the resulting polymers.Solution-processed organic light-emitting diodes based on the polymers exhibit excellent device performance with Commission Internationale de L’Eclairage(CIE)coordinates of(0.16,0.27),together with the maximum luminous efficiency of 30.7 cd A-1 and maximum external quantum efficiency of 15.0%,which is the best device efficiency for blue TADF polymers.

关 键 词：through-space charge transfer thermally activated delayed fluorescence oxygen-bridged triphenylboron electroluminescent polymer organic light-emitting diodes 

分 类 号：TN312.8[电子电信—物理电子学] TQ317[化学工程—高聚物工业]