Highly efficient excimer-based white phosphorescent devices with improved power efficiency and color rendering index

被引：42

作者：

Yang, Xiaohui ^{[1
]}

Wang, Zixing ^{[1
]}

Madakuni, Sijesh ^{[1
]}

Li, Jian ^{[1
]}

Jabbour, Ghassan E. ^{[1
,2
]}

机构：

[1] Arizona State Univ, Sch Mat & Adv Photovolta Ctr, Tempe, AZ 85284 USA

[2] Arizona State Univ, Flexible Display Ctr, Tempe, AZ 85284 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 19期

基金：

芬兰科学院; 美国国家科学基金会;

关键词：

colour; excimers; organic light emitting diodes; organic semiconductors; phosphorescence;

D O I：

10.1063/1.3013324

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Power efficiency, Commission Internationale d'Enclairage (CIE) coordinates, and color rendering index (CRI) of white phosphorescent excimer devices were improved by utilizing two platinum complexes as emissive dopants and exploring different device structures. Compared with devices containing two emissive layers each having a different dopant, devices having two dopants incorporated in a single host layer showed better color stability with the change in operating voltage. White phosphorescent excimer devices having the double-doped emissive layer showed an external quantum efficiency and a power efficiency of 14.5% and 17 lm/W, respectively, at 500 cd/m(2). The CIE coordinates and CRI of the devices were (0.382, 0.401) and 81, which were almost independent of the drive voltage.

引用

页数：3

共 16 条

[1] High efficiency single dopant white electrophosphorescent light emitting diodes [J].

Adamovich, V ;

Brooks, J ;

Tamayo, A ;

Alexander, AM ;

Djurovich, PI ;

D'Andrade, BW ;

Adachi, C ;

Forrest, SR ;

Thompson, ME .

NEW JOURNAL OF CHEMISTRY, 2002, 26 (09) :1171-1178

[2] WHITE-LIGHT FROM AN ELECTROLUMINESCENT DIODE MADE FROM POLY[3(4-OCTYLPHENYL)-2,2'-BITHIOPHENE] AND AN OXADIAZOLE DERIVATIVE [J].

BERGGREN, M ;

GUSTAFSSON, G ;

INGANAS, O ;

ANDERSSON, MR ;

HJERTBERG, T ;

WENNERSTROM, O .

JOURNAL OF APPLIED PHYSICS, 1994, 76 (11) :7530-7534

[3] White light emission from exciplex in a bilayer device with two blue light-emitting polymers [J].

Chao, CI ;

Chen, SA .

APPLIED PHYSICS LETTERS, 1998, 73 (04) :426-428

[4] Formation of triplet excimers and dimers in amorphous organic thin films and light emitting devices [J].

D'Andrade, B ;

Forrest, SR .

CHEMICAL PHYSICS, 2003, 286 (2-3) :321-335

[5]

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

[6]

2-6

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

D'Andrade, BW ;

Forrest, SR .

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

[8] Achieving high-efficiency polymer white-light-emitting devices [J].

Huang, JS ;

Li, G ;

Wu, E ;

Xu, QF ;

Yang, Y .

ADVANCED MATERIALS, 2006, 18 (01) :114-117

[9] MULTILAYER WHITE LIGHT-EMITTING ORGANIC ELECTROLUMINESCENT DEVICE [J].

KIDO, J ;

KIMURA, M ;

NAGAI, K .

SCIENCE, 1995, 267 (5202) :1332-1334

[10] 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

← 1 2 →