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

被引：102
作者：
Kim, Sung Hyun
Jang, Jyongsik
Lee, Jun Yeob
机构：
[1] Dankook Univ, Dept Polymer Sci & Engn, Seoul 140714, South Korea
[2] Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 151742, South Korea
来源：
APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 08期
关键词：
D O I：
10.1063/1.2773941
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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 12.7 to 29.1 lm/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.
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页数：3
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