Highly Efficient Phosphorescent Blue Organic Light-Emitting Diodes Based on Double-Emitting Layer

被引：0

作者：

Park, Jung Sun ^{[1
]}

Seo, Ji Hoon ^{[1
]}

Seo, Bo Min ^{[1
]}

Koo, Ja Ryong ^{[1
]}

Lee, Kum Hee ^{[2
]}

Yoon, Seung Soo ^{[2
]}

Kim, Young Kwan ^{[1
]}

机构：

[1] Hongik Univ, Dept Informat Display, Seoul 121791, South Korea

[2] Sungkyunkwan Univ, Dept Chem, Suwon, South Korea

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2010年 / 531卷

关键词：

Blue phosphorescent organic light emitting diodes; double-emitting layer; energy transfer; exciton confinement; DEVICES;

D O I：

10.1080/15421406.2010.495929

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this paper, We have demonstrated lower driving voltage and efficient Blue phosphorescent organic light emitting diodes (PHOLEDs) using iridium (III) bis[(4,6-di-fluoropheny)-pyridinato-N,C-2] picolinate doped in N,N'-dicarbazolyl-3,5-benzene (mCP) and 2,2',2 ''-(1,3,5-benzenetryl)tris(1-phenyl)-1H-benzimidazol (TPBi) as double-emitting layer system. D-EML layers were employed to have good exciton confinement. We also demonstrated that mCP as electron blocking layer inserted EML and HTL for higher efficiency. The optimized device of double EML of mCP: TPBi(1:1) exhibited a maximum external quantum efficiency of 9.22% at 0.21 mA/cm(2), a maximum Current efficiency of 18.89 cd/A at 0.21 mA/cm(2), and Commission Internationale de I'Eclairage coordinates of (0.17, 0.35) at 1000 cd/m(2), respectively.

引用

页码：21 / 26

页数：6

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