TITLE

Lithium salt doped conjugated polymers as electron transporting materials for highly efficient blue polymer light-emitting diodes

AUTHOR(S)
Fei Huang; Ping-I Shih; Liu, Michelle S.; Ching-Fong Shu; Jen, Alex K.-Y.
PUB. DATE
December 2008
SOURCE
Applied Physics Letters;12/15/2008, Vol. 93 Issue 24, p243302
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Highly efficient blue polymer light-emitting diodes (PLEDs) are fabricated using a conjugated polymer, poly[9,9-bis(2-(2-(2-diethanol-amino-ethoxy) ethoxy) ethyl) fluorene-alt-4, 4′-phenylether] as an electron transporting layer (ETL). It was found that the performance of these blue-emitting devices could be greatly improved if the ETL was doped with LiF or Li2CO3 salts. A bis[(4,6-di-fluorophenyl)-pyridinato-N, C2] (picolinate) Ir(III) (FIrpic) complex based blue phosphorescent PLED exhibited a maximum luminance efficiency of 20.3 cd/A with a luminance of 1600 cd/m2 at the current density of 7.9 mA/cm2 and drive voltage of 8.0 V.
ACCESSION #
35922144

 

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