Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5398721 | Journal of Luminescence | 2015 | 21 Pages |
Abstract
In this study, a highly efficient fluorescent/phosphorescent white organic light-emitting device (WOLED) was fabricated using exciplex light emission. The hole-transport material 4,4ʹ,4ʺ-tris(N-carbazolyl)triphenylamine (TCTA), and electron-transport material, 4,7-diphenyl-1,10-phenanthroline (Bphen), were mixed to afford a blue-emitting exciplex. The WOLED was fabricated with a yellow phosphorescent dye, Ir(III) bis(4-phenylthieno [3,2-c] pyridinato-N,C2ʹ) acetylacetonate (PO-01), combined with the exciplex. In this structure, the energy can be efficiently transferred from the blend layer to the yellow phosphorescent dye, thus improving the efficiency of the utilization of the triplet exciton. The maximum power efficiency of the WOLED reached a value 9.03 lm/W with an external quantum efficiency of 4.3%. The Commission Internationale de I'Eclairage (CIE) color coordinates (x,y) of the device were from (0.39, 0.45) to (0.27, 0.31), with a voltage range of 4-9 V.
Related Topics
Physical Sciences and Engineering
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Physical and Theoretical Chemistry
Authors
Dan Yang, Yahui Duan, Yongqiang Yang, Nan Hu, Xiao Wang, Fengbo Sun, Yu Duan,