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P‐112: Highly Efficient Electron Injection Layer of LiF/Yb Bilayer for Top‐emitting Organic Light Emitting Diodes
Author(s) -
Ahn Hyuk,
Lee Hyunkoo,
Yang Jungjin,
Lee Changhee
Publication year - 2012
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/j.2168-0159.2012.tb06091.x
Subject(s) - bilayer , optoelectronics , materials science , diode , layer (electronics) , quantum efficiency , oled , electron , luminous efficacy , chemistry , nanotechnology , membrane , physics , biochemistry , quantum mechanics
We report highly efficient electron injection layer (EIL) of LiF/Yb bilayer for top‐emitting organic light emitting diodes. The device with the LIF/Yb bilayer shows reduced operating voltage and enhanced efficiencies compared to other two devices with Yb and LiF/Al due to the reduced electron injection barrier, resulting in better charge balance. The device with the LiF/Yb bilayer shows high luminous efficiency of 53.2 cd/A and external quantum efficiency of 16.9%.