Quinoline-based aggregation-induced delayed fluorescence materials for highly efficient non-doped organic light-emitting diodes  

作　　者：Liang Zhang Yin-Feng Wang Meng Li Qing Yu Gao Chuan-Feng Chen 

机构地区：[1]Beijing National Laboratory for Molecular Sciences,CAS Key Laboratory of Molecular Recognition and Function,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China [2]College of Chemical Engineering,China University of Mining and Technology,Xuzhou 221116,China [3]University of Chinese Academy of Sciences,Beijing W0049,China

出　　处：《Chinese Chemical Letters》2021年第2期740-744,共5页中国化学快报（英文版）

基　　金：the National Natural Science Foundation of China (Nos.91956119,21871272,21521002) for financial supports。

摘　　要：Three new emitters,namely 10,10’-(quinoline-2,8-diyl)bis(10 H-phenoxazine)(Fene),10,10’-(quinoline-2,8-diyl)bis(10 H-phenothiazine)(Fens) and 10,10’-(quinoline-2,8-diyl)bis(9,9-dimethyl-9,10-dihydroacridine)(Yad),featuring quinoline as a new electron acceptor have been designed and conveniently synthesized.These emitters possessed small singlet-triplet splitting energy(ΔEst) and twisted structures,which not only endowed them show thermally activated delayed fluorescence(TADF)properties but also afforded a remarkable aggregation-induced emission(AIE) feature.Moreover,they also showed aggregation-induced delayed fluorescence(AIDF) property and good photoluminescence(PL) property,which are the ideal emitters for non-doped organic light-emitting diodes(OLEDs).Furthermore,high-performance non-doped OLEDs based on Fene,Fens and Yad were achieved,and excelle nt maximum external quantum efficiencies(EQEmax) of 14,9%,13.1% and 17,4%,respectively,were obtained.It was also found that all devices exhibited relatively low turn-on voltages ranging from 3.0 V to3.2 V probably due to their twisted conformation and the AIDF properties.These results demonstrated the quinoline-based emitters could have a promising application in non-doped OLEDs.

关 键 词：QUINOLINE Aggregation-induced emission Thermally activated delayed fluorescence Non-doped organic light-emitting diode 

分 类 号：TN383.1[电子电信—物理电子学] TB34[一般工业技术—材料科学与工程]