Spatial donor/acceptor architecture for intramolecular charge-transfer emitter  

作　　者：Hong-Cheng Li Xun Tang Sheng-Yi Yang Yang-Kun Qu Zuo-Quan Jiang Liang-Sheng Liao 

机构地区：[1]Institute of Functional Nano&Soft Materials(FUNSOM),Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices,Soochow University,Suzhou 215123,China [2]Institute of Organic Optoelectronics,Jiangsu Industrial Technology Research Institute(JITRI),Suzhou 215211,China

出　　处：《Chinese Chemical Letters》2021年第3期1245-1248,共4页中国化学快报（英文版）

基　　金：supported by the National Key R&D Program of China(No.2016YFB0400700);the National Natural Science Foundation of China(Nos.51773141,61961160731 and 51873139);funded by the Natural Science Foundation of Jiangsu Province of China(No.BK20181442);Collaborative Innovation Center of Suzhou Nano Science&Technology;the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD);the"111"Project。

摘　　要：Charge transfer via electron hopping from an electron donor(D)to an acceptor(A)in nanoscale,plays a crucial role in optoelectronic materials,such as organic light-emitting diodes(OLEDs)and organic photovoltaic cells(OPVs).Here,we propose a strategy for binding D/A units in space,where intramolecular charge-transfer can take place.The resulted material DM-Me-B is able to give bright emission in this molecular architecture because of the good control of D/A interaction and conformational rigidity.Moreover,DM-Me-B presents small singlet-triplet splitting energy,enabling thermally activated delayed fluorescence.Therefore,the DM-Me-B exhibits~20%maximum external quantum efficiency and low efficiency roll-off at 1000 cd/m^(2),certifying an effective strategy in controlling D/A blocks through space.

关 键 词：Thermally activated delayed fluorescence Donor/acceptor Organic light-emitting Efficiency roll-off TRIAZINE 

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]