Nondoped-type white organic electroluminescent devices utilizing complementary color and exciton diffusion

被引：107

作者：

Tsuji, T ^{[1
]}

Naka, S ^{[1
]}

Okada, H ^{[1
]}

Onnagawa, H ^{[1
]}

机构：

[1] Toyama Univ, Dept Elect & Elect Engn, Toyama 9308555, Japan

来源：

APPLIED PHYSICS LETTERS | 2002年 / 81卷 / 18期

关键词：

D O I：

10.1063/1.1516629

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We fabricated nondoped white organic electroluminescent devices using vacuum-deposited thin films of blue-emitting 4,4'-bis[N-1-napthyl-N-phenyl-amino]biphenyl (alpha-NPD) and orange-emitting 4-(dicyanomethylene)-2-metyl-6-(p-dimethyl aminostyryl)-4H-pyran (DCM), a hole-blocking layer of 2-(4-biphenyl)-5-(p-tert-butylphenyl)-1,3,4-oxadiazole (tBu-PBD) and electron-transporting tris(8-quinolinolato) aluminum (III). Excitons formed at the alpha-NPD/tBu-PBD interface sequentially transfer their energy to alpha-NPD via the Forster mechanism. The exciton is captured by an ultrathin DCM layer located within the pure alpha-NPD layer. The position of the DCM determines the device spectrum, and enables a white emission to be achieved. The spectrum is not sensitive to the voltage applied, and the devices show maximum luminance of about 1000 cd/m(2). (C) 2002 American Institute of Physics.

引用

页码：3329 / 3331

页数：3

共 15 条

[1]

Adachi C., 1991, Optoelectronics - Devices and Technologies, V6, P25

[2] White-light-emitting organic electroluminescent devices based on interlayer sequential energy transfer [J].

Deshpande, RS ;

Bulovic, V ;

Forrest, SR .

APPLIED PHYSICS LETTERS, 1999, 75 (07) :888-890

[3] White-light-emitting material for organic electroluminescent devices [J].

Hamada, Y ;

Sang, T ;

Fujii, H ;

Nishio, Y ;

Takanashi, H ;

Shibata, K .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 1996, 35 (10B) :L1339-L1341

[4] Enhanced electron injection in organic electroluminescence devices using an Al/LiF electrode [J].

Hung, LS ;

Tang, CW ;

Mason, MG .

APPLIED PHYSICS LETTERS, 1997, 70 (02) :152-154

[5] SINGLE-LAYER WHITE LIGHT-EMITTING ORGANIC ELECTROLUMINESCENT DEVICES BASED ON DYE-DISPERSED POLY(N-VINYLCARBAZOLE) [J].

KIDO, J ;

SHIONOYA, H ;

NAGAI, K .

APPLIED PHYSICS LETTERS, 1995, 67 (16) :2281-2283

[6] A blue organic light emitting diode [J].

Kijima, Y ;

Asai, N ;

Tamura, S .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1999, 38 (9A) :5274-5277

[7]

Kim T.S., 2001, P 21 INT DISPL RES C

[8]

KISHIGAWA Y, 2000, 2000 MAT RES SOC M 2

[9]

Naka S, 1997, IEICE T ELECTRON, VE80C, P1114

[10] Carrier transport properties of organic materials for EL device operation [J].

Naka, S ;

Okada, H ;

Onnagawa, H ;

Yamaguchi, Y ;

Tsutsui, T .

SYNTHETIC METALS, 2000, 111 :331-333

← 1 2 →