Enhancement of electron injection in organic light-emitting devices using an Ag/LiF cathode

X. J. Wang, J. M. Zhao, Y. C. Zhou, X. Z. Wang, S. T. Zhang, Y. Q. Zhan, Z. Xu, H. J. Ding, G. Y. Zhong, H. Z. Shi, Z. H. Xiong, Y. Liu, Z. J. Wang, E. G. Obbard, X. M. Ding, W. Huang, X. Y. Hou

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Abstract

An enhanced electroluminescent (EL) performance of organic light emitting devices (OLED) containing a Ag/LiF cathode structure was analyzed. It was found that the efficiency of electron injection from the cathode depends on the thickness of the LiF buffer layer. A brigthness of 16,000 cd/m2 and EL efficiency of 4.8 cd/A was achieved with an Ag/LiF cathode. This dependence of electron injection of the LiF thickness can be understood using the tunneling model.

Original languageEnglish
Pages (from-to)3828-3830
Number of pages3
JournalJournal of Applied Physics
Volume95
Issue number7
DOIs
StatePublished - 1 Apr 2004
Externally publishedYes

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