Controlling the carrier recombination zone for improved color stability in a two-dopant fluorophore/phosphor white organic light-emitting diode

被引：64

作者：

Bhansali, Unnat S. ^{[2
]}

Jia, Huiping ^{[2
]}

Quevedo Lopez, M. A. ^{[2
]}

Gnade, Bruce E. ^{[2
]}

Chen, Wei-Hsuan ^{[1
]}

Omary, Mohammad A. ^{[1
]}

机构：

[1] Univ N Texas, Dept Chem, Denton, TX 76203 USA

[2] Univ Texas Dallas, Erik Jonsson Sch Engn & Comp Sci, Dept Mat Sci & Engn, Richardson, TX 75083 USA

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 20期

关键词：

brightness; electron-hole recombination; fluorescence; organic compounds; organic light emitting diodes; phosphorescence; DEVICES; BLUE; EFFICIENCY; EMISSION;

D O I：

10.1063/1.3089867

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A white organic light-emitting diode (WOLED) is produced upon systematic introduction of deep-blue fluorescence from 4,4(')-bis(9-ethyl-3-carbazovinylene)-1,1(')-biphenyl to broad-band yellow phosphorescence from bis[3,5-bis(2-pyridyl)-1,2,4-triazolato]platinum(II) in the common host 4,4(')-bis(carbazol-9-yl)biphenyl. The carrier recombination zone is first identified upon investigating alternative device structures, then optimized by varying the thickness of the electron-transport layer. The WOLED exhibits striking stability of color and efficiency, as manifest by parameters at high brightness of 1000 cd/m(2) sustaining 94%-122% their values at 50 cd/m(2).

引用

页数：3

共 17 条

[1] 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

[2]

D'Andrade BW, 2002, ADV MATER, V14, P1032, DOI 10.1002/1521-4095(20020805)14:15<1032::AID-ADMA1032>3.0.CO

[3]

2-6

[4] White organic light-emitting devices for solid-state lighting [J].

D'Andrade, BW ;

Forrest, SR .

ADVANCED MATERIALS, 2004, 16 (18) :1585-1595

[5] Efficient organic electrophosphorescent white-light-emitting device with a triple doped emissive layer [J].

D'Andrade, BW ;

Holmes, RJ ;

Forrest, SR .

ADVANCED MATERIALS, 2004, 16 (07) :624-+

[6] Stacked white organic light-emitting devices based on a combination of fluorescent and phosphorescent emitters [J].

Kanno, Hiroshi ;

Giebink, Noel C. ;

Sun, Yiru ;

Forrest, Stephen R. .

APPLIED PHYSICS LETTERS, 2006, 89 (02)

[7] Platinum binuclear complexes as phosphorescent dopants for monochromatic and white organic light-emitting diodes [J].

Ma, Biwu ;

Djurovich, Peter I. ;

Garon, Simona ;

Alleyne, Bert ;

Thompson, Mark E. .

ADVANCED FUNCTIONAL MATERIALS, 2006, 16 (18) :2438-2446

[8]

OMARY MA, Patent No. 611756190

[9]

OMARY MA, Patent No. 61188428

[10] Stacked white organic light emitting devices consisting of separate red, green, and blue elements [J].

Qi, Xiangfei ;

Slootsky, Michael ;

Forrest, Stephen .

APPLIED PHYSICS LETTERS, 2008, 93 (19)

← 1 2 →