【摘 要】
：
Three new emitters,namely 10,10'-(quinoline-2,8-diyl)bis(10H-phenoxazine) (Fene),10,10'-(quinoline2,8-diyl)bis(10H-phenothiazine) (Fens) and 10,10'-(quinoline-2
【机 构】
：
Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and
论文部分内容阅读
Three new emitters,namely 10,10'-(quinoline-2,8-diyl)bis(10H-phenoxazine) (Fene),10,10'-(quinoline2,8-diyl)bis(10H-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 (△Est) 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 excellent 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 to 3.2 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.
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