Delayed Fluorescence and Amplified Chirality via Modified Substitution Position for Deep-red Circularly Polarized Organic Light Emitting-diodes  

作　　者：ZHU Lixun LIU Dan WU Kaiwen XIE Guohua ZHAO Zheng TANG Ben Zhong 

机构地区：[1]School of Science and Engineering,Shenzhen Institute of Aggregate Science and Technology,The Chinese University of Hong Kong,Shenzhen(CUHK-Shenzhen),Shenzhen,518172,P.R.China [2]Department of Chemistry,Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction,The Hong Kong University of Science and Technology,Hongkong,999077,P.R.China [3]The Institute of Flexible Electronics(Future Technologies),Xiamen University,Xiamen,361005,P.R.China

出　　处：《Chemical Research in Chinese Universities》2024年第4期657-663,共7页高等学校化学研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.52273197 and 52333007);the Project of the Shenzhen Key Laboratory of Functional Aggregate Materials,China(No.ZDSYS20211021111400001);the Project of the Science Technology Innovation Commission of Shenzhen Municipality,China(Nos.JCYJ2021324134613038,KQTD20210811090142053,JCYJ20220818103007014,GJHZ20210705141810031);the Project of the Innovation and Technology Commission,China(No.ITCCNERC14SC01).

摘　　要：Developing easily accessible deep-red/near-infrared circularly polarized emitters for practical organic light-emitting diodes remains a significant challenge.Here,a practical strategy has been proposed for developing deep-red circularly polarized delayed fluorescent emitters based on a novel chiral acceptor platform.By changing triphenylamine(TPA)substitution position from para to meta,R/S-M-TBBTCN demonstrated thermally activated delayed fluorescence(TADF)properties with a delayed lifetime of 6.6µs that R/S-P-TBBTCN doesn’t have.Furthermore,R/S-M-TBBTCN showed a 65 nm red-shift in emission and a 10-fold enhancement in asymmetry factor(glum),compared with R/S-P-TBBTCN.The solution-processed nondoped circularly polarized organic light-emitting diodes(CP-OLEDs)based on R-M-TBBTCN display deep-red emission and 2.2%external quantum efficiency.

关 键 词：Amplified chirality Deep-red circularly polarized organic light emitting-diode Binaphthol based chiral acceptor 

分 类 号：O62[理学—有机化学]