Organic electrophosphorescent devices with mixed hole transport material as emission layer

被引：50

作者：

Matsushima, H ^{[1
]}

Naka, S ^{[1
]}

Okada, H ^{[1
]}

Onnagawa, H ^{[1
]}

机构：

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

来源：

CURRENT APPLIED PHYSICS | 2005年 / 5卷 / 04期

基金：

日本科学技术振兴机构;

关键词：

organic electrophosphorescent device; time-of-flight; carrier mobility;

D O I：

10.1016/j.cap.2003.11.091

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on the reduction of driving voltage in organic electrophosphorescent devices with mixed hole transport material as emission layer. The emission layer was mixed with N,N'-diphenyl-N,N'-(3-methylphenyl) -[1,1'-biphenyl]-4,4'-diamine (TPD) as a hole-transport material.. 4,4'-bis(9-carbazolyl)-biphenyl (CBP) as a host material for a phosphorescent material, tris(2-phenylpyridine) iridium (Ir(ppy)(3)) as a phosphorescent material and 2,9-dimetliyl-4,7-diphenyl-1,10-phenanthroline (bathocuproine: BCP) as an electron-transport material. The emission occurred from Ir(ppy)(3) and was independent on the ratio of TPD and CBP. For triple-layered device with the TPD:CBP mixing ratio of 10:90, maximum luminance obtained was 104,000 cd/m(2) at V = 12 V, J = 490 mA/cm(2). Maximum efficiency was 20 lm/W at 3.1 mA/cm(2). (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：305 / 308

页数：4

共 7 条

[1] Very high-efficiency green organic light-emitting devices based on electrophosphorescence [J].

Baldo, MA ;

Lamansky, S ;

Burrows, PE ;

Thompson, ME ;

Forrest, SR .

APPLIED PHYSICS LETTERS, 1999, 75 (01) :4-6

[2] 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

[3] Effect of aromatic diamines as a cathode interface layer [J].

Kanai, H ;

Ichinosawa, S ;

Sato, Y .

SYNTHETIC METALS, 1997, 91 (1-3) :195-196

[4] ORGANIC ELECTROLUMINESCENT DEVICES USING A MIXED SINGLE-LAYER [J].

NAKA, S ;

SHINNO, K ;

OKADA, H ;

ONNAGAWA, H ;

MIYASHITA, K .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 1994, 33 (12B) :L1772-L1774

[5] 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

[6]

Pfeiffer M, 2002, ADV MATER, V14, P1633, DOI 10.1002/1521-4095(20021118)14:22<1633::AID-ADMA1633>3.0.CO

[7]

2-#

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