Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5402582 | Journal of Luminescence | 2010 | 4 Pages |
Abstract
We demonstrate a non-doped white organic light-emitting diode (WOLED) in which the blue-, green- and red-emissions are generated from 4,4â²-bis(2,2â²-diphenylvinyl)-1,1â²-biphenyl, tris(8-hydroxyquinoline)aluminum (Alq) and 4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyl-julolidyl 9-enyl)-4H-pyran (DCJTB), which is used as an ultrathin layer. The DCJTB ultrathin layer plays the chromaticity tuning role in optimizing the white spectral band by modulating the location of the DCJTB ultrathin layer in the green emissive Alq layer. The optimized WOLED gives the Commission Internationale de l'Eclairage-1931 xy coordinates of (0.319, 0.335), a color rendering index of 91.2 at 10Â V, a maximum brightness of 21010Â cd/m2 at 12Â V and a maximum current efficiency of 5.17Â cd/A at 6.6Â V. The electroluminescence mechanism of the white device is also discussed.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Jianzhuo Zhu, Wenlian Li, Bei Chu, Fei Yan, Dongfang Yang, Huihui Liu, Junbo Wang,