TITLE

100% internal quantum efficiency and stable efficiency roll-off in phosphorescent light-emitting diodes using a high triplet energy hole transport material

AUTHOR(S)
Soon-Ok Jeon; Kyoung Soo York; Chul Woong Joo; Jun Yeob Lee; Kwang-Yuon Ko; Jong-Yek Park; Yong Gu Baek
PUB. DATE
August 2008
SOURCE
Applied Physics Letters;8/11/2008, Vol. 93 Issue 6, p063306
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Highly efficient green phosphorescent organic light-emitting diodes were developed by using high triplet energy hole transport materials. The quantum efficiency of green devices could be improved from 12% to 20% at 1000 cd/m2 by using a phenylcarbazole based hole transport material. In addition, the high quantum efficiency could be stably maintained up to a high luminance of 10 000 cd/m2.
ACCESSION #
34000014

 

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