TITLE

Highly efficient pure blue electroluminescence from 1,4-bis[2-(3-N-ethylcarbazoryl)vinyl]benzene

AUTHOR(S)
Wu, Y.Z.; Zheng, X.Y.; Zhu, W.Q.; Sun, R.G.; Jiang, X.Y.; Zhang, Z.L.; Xu, S.H.
PUB. DATE
December 2003
SOURCE
Applied Physics Letters;12/15/2003, Vol. 83 Issue 24, p5077
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
An efficient blue organic light-emitting diode with 1,4-bis[2-(3-N-ethylcarbazoryl)vinyl]benzene doped into 4,4[sup ′]-N,N[sup ′]-dicarbazole-biphyenyl is reported. Maximum luminance and external quantum efficiency are 8500 cd/m[sup 2] and 2.6%. CIE-1931 coordinates are x=0.15, y=0.16. The device performance was further improved by introducing bis(2-methyl-8quinolinato)4-phenylphenolate aluminum to assist electron injection. The maximum luminance and quantum efficiency reached 11000 cd/m[sup 2] and 3.3%, respectively. Föster energy transfer and especially a carrier trapping mechanism are considered to dominate in the process of electroluminescence. © 2003 American Institute of Physics.
ACCESSION #
11649632

 

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