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

Jun-tao Hu; Sheng Hu; Kang-li Ye; Qing-qing Wei; Kai Xu; Xiang-hua Wang

doi:10.1007/s11801-017-7055-0

Optoelectronics Letters ›› , Vol. 13 ›› Issue (4) : 271-274. DOI: 10.1007/s11801-017-7055-0

Article

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

Jun-tao Hu¹^,^a ,
Sheng Hu¹^,² ,
Kang-li Ye¹^,² ,
Qing-qing Wei¹^,² ,
Kai Xu¹ ,
Xiang-hua Wang¹

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Abstract

We fabricated organic light-emitting diodes (OLEDs) with the thermally activated delayed fluorescence (TADF) material of 4CzIPN, which show better stability compared with the 4,4’-Bis(carbazol-9-yl)biphenyl (CBP) based devices. The half lifetime of the device using 4CzIPN 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 stability to the good film morphology and difficult crystallization property of 4CzIPN. Our results suggest that employing the 4CzIPN as host material can be a promising way of fabricating OLEDs with longer operation lifetime.

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Jun-tao Hu, Sheng Hu, Kang-li Ye, Qing-qing Wei, Kai Xu, Xiang-hua Wang. Improving operation lifetime of OLED by using thermally activated delayed fluorescence as host. Optoelectronics Letters, , 13(4): 271‒274 https://doi.org/10.1007/s11801-017-7055-0

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This work has been 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), and the Industry-University-Research Cooperation Project of Aviation Industry Corporation of China (No.CXY2013HFGD20).