Application of compound blue for white OLED

Used as a blue emitter, fluorescent dye 4,4'-bis(9-ethyl-3-carbazovinylene)1,1'-biphenyl (BCzVBi) is compounded with Bis[2-(2-hydroxyphenylj-pyridinejberyllium([Bepp.sub.2]j to yield high efficiency. When combined with green and red phosphorescent emitting layers, a broad band white light...

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Bibliographic Details
Published inCanadian journal of physics Vol. 92; no. 7; pp. 947 - 950
Main Authors Zhang, T, He, S.J, Wang, D.K, Jiang, N, Lu, Z.H
Format Journal Article
LanguageEnglish
Published Ottawa NRC Research Press 01.07.2014
Canadian Science Publishing NRC Research Press
Subjects
Beryllium
Color
Devices
Dyes
Dyes and dyeing
Emittance
Excitons
Optimization
Organic LEDs
Organic light emitting diodes
Production processes
White light
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Summary:Used as a blue emitter, fluorescent dye 4,4'-bis(9-ethyl-3-carbazovinylene)1,1'-biphenyl (BCzVBi) is compounded with Bis[2-(2-hydroxyphenylj-pyridinejberyllium([Bepp.sub.2]j to yield high efficiency. When combined with green and red phosphorescent emitting layers, a broad band white light organic light-emitting diodes are obtained and studied. In this device, both singlet and triplet excitons can be harvested to generate white color. Through device structure optimization, a high efficiency of 20.8 cd/A, which corresponds to an external quantum efficiency of 11.3% has been achieved.
Bibliography:ObjectType-Article-1
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ISSN:0008-4204
1208-6045
DOI:10.1139/cjp-2013-0520