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

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【Author】 HU Jun-tao;LU Chao-chao;WANG Peng;LI Jie;XU Kai;WANG Xiang-hua;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;

【通讯作者】胡俊涛;

【机构】 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；

【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.更多还原

【Abstract】 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.更多还原

【关键词】 DMAC； thermally； lifetime； phenylene； attributed； carbazole； emitter； guest； benzene； doping；

【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)

【文献出处】 Optoelectronics Letters ,光电子快报(英文版) , 编辑部邮箱 ,2019年05期

【分类号】TN312.8
【下载频次】27

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