TITLE

Effect of polymer-insulating nanolayers on electron injection in polymer light-emitting diodes

AUTHOR(S)
Jong Hyeok Park, Michael J.; O Ok Park; Jae-Woong Yu; Jai Kyeong Kim; Young Chul Kim
PUB. DATE
March 2004
SOURCE
Applied Physics Letters;3/8/2004, Vol. 84 Issue 10, p1783
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report the effect of polymer-insulating nanolayers on electron injection in the polymer light-emitting diodes (PLEDs) in which a hole is the major charge carrier. Several different polymer nanolayers with varying dielectric constants were placed between the emitting layer and the aluminum cathode, and their influence on the device performance was investigated. The device with a nanolayer of lower dielectric constant demonstrated higher luminescence quantum efficiency. In particular, when a ∼10-nm-thick polystyrene layer was employed, the device gave approximately two orders of magnitude higher external quantum efficiency than that of the one without an insulating nanolayer. © 2004 American Institute of Physics.
ACCESSION #
12405688

 

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