高等学校化学学报2023，Vol.44Issue(12)：10-17,8.DOI:10.7503/cjcu20230274
基于四氰基受体单元的高效近红外热激活延迟荧光
High-efficiency Near-infrared Thermally Activated Delayed Fluorescence Based on Tetracyano Acceptor
摘要
Abstract
The near-infrared thermally activated delayed fluorescence(TADF)material 11,12-bis[4-(diphenyla-min)phenyl]dipyrido[3,2-a:2',3'-c]phenazine-3,6,10,13-tetracarbonitrile(FCNPZ-TPA)was designed and syn-thesized with dipyridinophenazine as the acceptor unit and triphenylamine(TPA)as the donor unit.The introduction of four cyano groups into the acceptor unit increased its electron-withdrawing strength.Considering that tripheny-lamine is a strong electron-donating group,we successfully pushed the emission of FCNPZ-TPA into Near Infra(NIR)region via the incorporation of strong donor and strong acceptor.The steric hindrance between donor(D)and acceptor(A)led to a twisted D-A molecular configuration of FCNPZ-TPA,and thus achieving a small singlet-triplet energy gap(ΔEST).Due to the rigid molecular skeleton and small ΔEST,FCNPZ-TPA based organic light-emitting diode(OLED)exhibited a state-of-the-art maximum external quantum efficiency(EQE)of 8.01 % at 742 nm when doped in the 4,4'-bis(N-carbazolyl)-1,1'-biphenyl.关键词
热激活延迟荧光/近红外/单线态-三线态能级差/外量子效率Key words
Thermally activated delayed fluorescence/Near-infrared/Singlet-triplet energy gap/External quantum efficiency分类
化学化工引用本文复制引用
王霄靖,刘艺霞,李阳,杨陈宗,冯敏强,樊健..基于四氰基受体单元的高效近红外热激活延迟荧光[J].高等学校化学学报,2023,44(12):10-17,8.基金项目
国家自然科学基金(批准号:21871199,22005184,21933002)资助.Supported by the National Natural Science Foundation of China(Nos.21871199,22005184,21933002). （批准号:21871199,22005184,21933002）
