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 ...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.展开更多
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)+2 种基金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)
文摘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.
