Improving operation lifetime of OLED by using thermally activated delayed fluorescence as host  

作　　者：HU Jun-tao HU Sheng YE Kang-li WEI Qing-qing XU Kai WANG Xiang-hua 胡俊涛;胡晟;叶康利;卫庆庆;许凯;王向华(Key Lab of Special Display Technology, Ministry of Education, National Engineering Lab of Special Display Technology, State Key Lab of Advanced Display Technology, Academy of Opto-Electronic Technology, Hefei University of Technology;School of Instrument Science and Opto-Electronics Engineering, Hefei University of Technology)

机构地区：[1]Key Lab of Special Display Technology, Ministry of Education, National Engineering Lab of Special Display Tech- nology, 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》2017年第4期271-274,共4页光电子快报（英文版）

基　　金：supported by the National High Technology Research and Development Program of China(No.2012AA011901);the National Basic Research Program of China(No.2012CB723406);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 organic light-emitting diodes （OLEDs） with the thermally activated delayed fluorescence （TADF） mate- rial of 4CzlPN, Which show better stability compared with the 4,4＇-Bis（carbazol-9-yl）biphenyl （CBP） based devices. The half lifetime of the device using 4CzlPN as host material has doubled, and a slower voltage rise compared with that of CBP-based devices has been achieved, which indicates the improvement of stability. We attribute the better sta- bility to the good film morphology and difficult crystallization property of 4CzlPN. Our results suggest that employing the 4CzlPN as host material can be a promising way of fabricating OLEDs with longer operation lifetime.

关 键 词：FLUORESCENCE Light emitting diodes Sound insulating materials 

分 类 号：TN383.1[电子电信—物理电子学] O625.21[理学—有机化学]