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Improved White Organic Electroluminescent Devices Using Fine Mesh as an Evaporation Mask by Toshie Tsuji; Shigeki Naka; Hiroyuki Okada; Hiroyoshi Onnagawa is a Materials Science article available to read on EtoBox.

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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 4,4 0 -bis(2,2-diphenylvinyl)-1,1 0 -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(6 0 -(2 0 -2 00 -bipyridyl))-1,1-dimethyl-3,4diphenylsilole (PyPySPyPy) as an electron transport material showed maximum luminance of 20,200 cd/m 2 , maximum efficiency of 11.7 lm/W and maximum external quantum efficiency of 3%. The white emission of Commission Internationale de l' Eclairage chromaticity coordinates was obtained (0:26; 0:33).

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Author

Toshie Tsuji; Shigeki Naka; Hiroyuki Okada; Hiroyoshi Onnagawa

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1567-1739)

Published

2005

Language

EN

Field

Materials Science (Physical Sciences)