Lifetime improvement of green phosphorescent organic light-emitting diodes by charge confining device structure

被引：31

作者：

Kim, Sung Hyun

Jang, Jyongsik

Lee, Jun Yeob ^{[1
]}

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 / 90卷 / 20期

关键词：

D O I：

10.1063/1.2740587

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Lifetime improvement of green phosphorescent organic light-emitting diodes by charge confinement inside an emitting layer was investigated. Excitons were confined within the emitting layer by using a charge confining structure with a high doping concentration at the center of the emitting layer. The lifetime of green devices could be improved by more than five times by confining the excitons at the center of the emitting layer. (C) 2007 American Institute of Physics.

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页数：3

相关论文

共 12 条

[1] Nearly 100% internal phosphorescence efficiency in an organic light-emitting device [J].

Adachi, C ;

Baldo, MA ;

Thompson, ME ;

Forrest, SR .

JOURNAL OF APPLIED PHYSICS, 2001, 90 (10) :5048-5051

[2] Degradation mechanism of small molecule-based organic light-emitting devices [J].

Aziz, H ;

Popovic, ZD ;

Hu, NX ;

Hor, AM ;

Xu, G .

SCIENCE, 1999, 283 (5409) :1900-1902

[3]

Becker H., 2005, SID INT S, V36, P1062

[4]

BURROUGHES JH, 2004, UNPUB AS DISPL IMID

[5] Highly efficient phosphorescence from organic light-emitting devices with an exciton-block layer [J].

Ikai, M ;

Tokito, S ;

Sakamoto, Y ;

Suzuki, T ;

Taga, Y .

APPLIED PHYSICS LETTERS, 2001, 79 (02) :156-158

[6] High efficiency phosphorescent organic light emitting diodes using triplet quantum well structure [J].

Kim, Sung Hyun ;

Jang, Jyongsik ;

Hong, Jae-Min ;

Lee, Jun Yeob .

APPLIED PHYSICS LETTERS, 2007, 90 (17)

[7] A novel family of boron-containing hole-blocking amorphous molecular materials for blue- and blue-violet-emitting organic electroluminescent devices [J].

Kinoshita, M ;

Kita, H ;

Shirota, Y .

ADVANCED FUNCTIONAL MATERIALS, 2002, 12 (11-12) :780-786

[8] Current status of electrophosphorescent device stability [J].

Kwong, RC ;

Weaver, MS ;

Lu, MHM ;

Tung, YJ ;

Chwang, AB ;

Zhou, TX ;

Hack, M ;

Brown, JJ .

ORGANIC ELECTRONICS, 2003, 4 (2-3) :155-164

[9] High operational stability of electrophosphorescent devices [J].

Kwong, RC ;

Nugent, MR ;

Michalski, L ;

Ngo, T ;

Rajan, K ;

Tung, YJ ;

Weaver, MS ;

Zhou, TX ;

Hack, M ;

Thompson, ME ;

Forrest, SR ;

Brown, JJ .

APPLIED PHYSICS LETTERS, 2002, 81 (01) :162-164

[10]

Lee J.-I., UNPUB