Fine Tuning of Donor-Acceptor Structures in Fused-Carbazole Containing Thermally Activated Delayed Fluorescence Materials towards High-Efficiency OLEDs  

作　　者：Wenbo Yuan Weiyang Hu Jian Wang Mengyuan Zhu Changsheng Shi Ning Sun Youtian Tao 

机构地区：[1]Key Lab for Flexible Electronics&Institute of Advanced Materials(IAM),Nanjing Tech University,30 South Puzhu Road,Nanjing,Jiangsu 211816,China [2]Department of Physics,Center for Optoelectronics Engineering Research,Yunnan University,Kunming,Yunnan 65091,China

出　　处：《Chinese Journal of Chemistry》2023年第15期1829-1835,共7页中国化学（英文版）

基　　金：the National Natural Science Foundation of China(Nos.91833304 and 61761136013).

摘　　要：Comprehensive Summary Conjugated fused-ring structures have attracted extensive attention due to their high molecular rigidity to restrain excited-state relaxation and non-radiative decay,and further to enhance the luminance efficiency for emissive materials.Herein,we develop a series of donor-acceptor type thermally activated delayed fluorescence(TADF)emitters by introducing fused-ring 5H-benzofuro[3,2-c]carbazole(32BFCz)as electron donating unit.Through optimizing the numbers and structure of donor and acceptor moieties,three compounds named 32BFCzA,mCF3BFCzOXD and dCF3BFCzOXD are designed,which are composed by mono-32BFCz/trifluoromethylpicolinonitrile,penta-BFCz/3-(trifluoromethyl)phenyl)-1,3,4-oxadiazol-2-yl)benzene and penta-32BFCz/3,5-bis(trifluoromethyl)phenyl)-1,3,4-oxadiazol-2-yl)benzene as donor/acceptor groups,respectively.

关 键 词：DONOR-ACCEPTOR Dipole moment Thermally activated delayed fluorescence Organic light-emitting diodes External quantum efficiency 

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]