TITLE

High efficiency, color stability, and stable efficiency roll off in three color hybrid white organic light emitting diodes

AUTHOR(S)
Kyoung Soo Yook; Soon Ok Jeon; Chul Woong Joo; Jun Yeob Lee
PUB. DATE
August 2008
SOURCE
Applied Physics Letters;8/18/2008, Vol. 93 Issue 7, p073302
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
High efficiency, good color stability, and stable efficiency roll off were achieved in three color white organic light emitting diodes by developing a device architecture with red and green phosphorescent materials codoped in a mixed host emitting structure. A fluorescent blue material was used in a blue emitting layer and a mixed interlayer structure was applied. A high quantum efficiency of 9.7% was obtained and color coordinate of (0.40, 0.40) was kept constant up to luminance of 10 000 cd/m2. In addition, efficiency decrease at 10 000 cd/m2 was only 2% of the maximum quantum efficiency.
ACCESSION #
34135665

 

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