Effect of the Charge Balance on High-Efficiency Blue-Phosphorescent Organic Light-Emitting Diodes

被引：85

作者：

Chopra, Neetu ^{[1
]}

Lee, Jaewon ^{[1
]}

Zheng, Ying ^{[1
]}

Eom, Sang-Hyun ^{[1
]}

Xue, Jiangeng ^{[1
]}

So, Franky ^{[1
]}

机构：

[1] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2009年 / 1卷 / 06期

关键词：

OLEDs; blue phosphorescence; charge balance; single-carrier devices; DEVICES; ELECTROPHOSPHORESCENCE;

D O I：

10.1021/am900228b

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The charge balance in blue-phosphorescent devices Was studied using single-carrier devices, and the results show that the transport is highly hole dominant. The effect of the charge balance on the device performance was further demonstrated using different,electron-transport materials with different electron mobilities. By optimization of the charge balance, a maximum current efficiency of 60 Cd A(-1) at a luminance of 500 cd m(-2) was achieved.

引用

页码：1169 / 1172

页数：4

共 24 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] Highly efficient phosphorescent emission from organic electroluminescent devices [J].

Baldo, MA ;

O'Brien, DF ;

You, Y ;

Shoustikov, A ;

Sibley, S ;

Thompson, ME ;

Forrest, SR .

NATURE, 1998, 395 (6698) :151-154

[3] Transient analysis of organic electrophosphorescence: I. Transient analysis of triplet energy transfer [J].

Baldo, MA ;

Forrest, SR .

PHYSICAL REVIEW B, 2000, 62 (16) :10958-10966

[4] Organic light-emitting diodes with a bipolar transport layer [J].

Choong, VE ;

Shi, S ;

Curless, J ;

Shieh, CL ;

Lee, HC ;

So, F ;

Shen, J ;

Yang, J .

APPLIED PHYSICS LETTERS, 1999, 75 (02) :172-174

[5]

CHOPRA N, 2008, J APPL PHYS UNPUB

[6] The path to ubiquitous and low-cost organic electronic appliances on plastic [J].

Forrest, SR .

NATURE, 2004, 428 (6986) :911-918

[7] Measuring the efficiency of organic light-emitting devices [J].

Forrest, SR ;

Bradley, DDC ;

Thompson, ME .

ADVANCED MATERIALS, 2003, 15 (13) :1043-1048

[8] Triplet exciton confinement and unconfinement by adjacent hole-transport layers [J].

Goushi, K ;

Kwong, R ;

Brown, JJ ;

Sasabe, H ;

Adachi, C .

JOURNAL OF APPLIED PHYSICS, 2004, 95 (12) :7798-7802

[9] Blue organic electrophosphorescence using exothermic host-guest energy transfer [J].

Holmes, RJ ;

Forrest, SR ;

Tung, YJ ;

Kwong, RC ;

Brown, JJ ;

Garon, S ;

Thompson, ME .

APPLIED PHYSICS LETTERS, 2003, 82 (15) :2422-2424

[10] 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

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