Improved performance of blue phosphorescent organic light-emitting diodes with a mixed host system

被引：55

作者：

Lee, Jonghee ^{[1
]}

Lee, Jeong-Ik ^{[1
]}

Lee, Jun Yeob ^{[2
]}

Chu, Hye Yong ^{[1
]}

机构：

[1] Elect & Telecommun Res Inst, Convergence Components & Mat Res Lab, Taejon 305350, South Korea

[2] Dankook Univ, Dept Polymer Sci & Engn, Yongin 448701, South Korea

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 25期

关键词：

ENERGY-TRANSFER; DEVICES; EFFICIENCY; ELECTROPHOSPHORESCENCE; STABILITY; EMISSION;

D O I：

10.1063/1.3276075

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have investigated a relationship between device performances and host properties in the emissive layer (EML) of iridium (III) bis(4',6'-difluorophenylpyridinato)tetrakis(1-pyrazolyl)borate doped blue phosphorescent organic light-emitting diodes (PHOLEDs). We found that the recombination zone as well as charge carrier injection properties of the EML could be systematically engineered through a mixed host system. Therefore, light-emitting performances of blue PHOLEDs were greatly improved with external quantum and power efficiencies of 20.5% and 43.5 lm/W at a luminance of 56 cd/m(2), respectively. (C) 2009 American Institute of Physics. [doi:10.1063/1.3276075]

引用

页数：3

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