Achieving high-performance phosphorescent organic light-emitting diodes using thermally activated delayed fluorescence with low concentration  

作　　者：HU Jun-tao LU Chao-chao WANG Peng LI Jie XU Kai WANG Xiang-hua 胡俊涛;陆超超;王鹏;李杰;许凯;王向华(National Engineering Lab of Special Display Technology, State Key Lab of Advanced Display Technology, Academy of Opto-Electronic Technology, Hefei University of Technology, Hefei 230009, China;School of Instrument Science and Opto-electronics Engineering, Hefei University of Technology, Hefei 230009, China)

机构地区：[1]National Engineering Lab of Special Display Technology, State Key Lab of Advanced Display Technology, Academy of Opto-Electronic Technology, Hefei University of Technology, Hefei 230009, China [2]School of Instrument Science and Opto-electronics Engineering, Hefei University of Technology, Hefei 230009, China

出　　处：《Optoelectronics Letters》2019年第5期347-351,共5页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.51573036);the Fundamental Research Funds for the Central Universities of China(No.JD2016JGPY0007);the Industry-University-Research Cooperation Project of Aviation Industry Corporation of China(No.CXY2013HFGD20)

摘　　要：We fabricated phosphorescent organic light-emitting diodes(Ph OLEDs) using thermally activated delayed fluorescence(TADF) material 10,10’-(4,4’-sulfonylbis(4,1-phenylene)) bis(9,9-dimethyl-9,10-dihydroacridine)(DMAC-DPS) with low concentration, which showed better performance compared with 1,3-bis(carbazole-9-yl) benzene(m CP) based devices. When the concentration of DMAC-DPS was 1 wt%, the driving voltage of the device was only 3.3 V at 1 000 cd/m2, and the efficiency and lifetime of the device were effectively improved compared with those of m CP based devices. The result indicated that DMAC-DPS could effectively improve the performance of phosphorescent devices. We believe that the better device performance can be attributed to the optimization of the energy transfer process in the emitter layer and lifetime of triplet excitons by DMAC-DPS. The study may provide a simple and effective strategy to achieve high-performance OLEDs.

关 键 词：PHOSPHORESCENT organic LIGHT-EMITTING diodes(Ph OLEDs) thermally ACTIVATED delayed fluorescence(TADF) DMAC-DPS 

分 类 号：TN[电子电信]