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Relationship between host energy levels and device performances of phosphorescent organic light-emitting diodes with triplet mixed host emitting structure

Authors :
Sung Hyun Kim
Jun Yeob Lee
Jyongsik Jang
Source :
Applied Physics Letters. 91:083511
Publication Year :
2007
Publisher :
AIP Publishing, 2007.

Abstract

Green phosphorescent organic light-emitting diodes (PHOLEDs) with a triplet mixed host emitting layer were developed and device performances were studied by changing host materials in light-emitting layer. Power efficiency of green PHOLEDs could be improved from 12.7to29.1lm∕W by using triplet mixed host emitting layer. Combination of hole-transport-type host with good hole injection properties and electron-transport-type host with good electron injection properties was effective to get high efficiency in triplet mixed host devices.

Details

ISSN :
10773118 and 00036951
Volume :
91
Database :
OpenAIRE
Journal :
Applied Physics Letters
Accession number :
edsair.doi...........4b35a729436abcc359534bff2aa54756
Full Text :
https://doi.org/10.1063/1.2773941