Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10706542 | Current Applied Physics | 2005 | 4 Pages |
Abstract
We describe an improvement of a white organic EL devices using fine mesh as an evaporation mask. The bright white emission was obtained by controlling the ratio of emission area 4,4â²-bis(2,2-diphenylvinyl)-1,1â²-biphenyl (DPVBi) as a blue emitting layer and 5,6,11,12-tetraphenylnaphthacene (rubrene) as a yellow emitting layer. The device with 2,5-bis(6â²-(2â²-2â³-bipyridyl))-1,1-dimethyl-3,4-diphenylsilole (PyPySPyPy) as an electron transport material showed maximum luminance of 20,200 cd/m2, maximum efficiency of 11.7 lm/W and maximum external quantum efficiency of 3%. The white emission of Commission Internationale de l'Ãclairage chromaticity coordinates was obtained (0.26,0.33).
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Toshie Tsuji, Shigeki Naka, Hiroyuki Okada, Hiroyoshi Onnagawa,