Bipolar host materials for green triplet emitter in organic light-emitting diodes

被引：18

作者：

Jeon, Ji Young

Park, Tae Jin

Jeon, Woo Sik

Park, Jung Joo

Jang, Jin

Kwon, Jang Hyuk ^{[1
]}

Lee, Jae Yeol

机构：

[1] Kyung Hee Univ, Adv Display Res Ctr, Seoul 130701, South Korea

[2] Kyung Hee Univ, Res Inst Basic Sci, Seoul 130701, South Korea

[3] Kyung Hee Univ, Dept Chem, Seoul 130701, South Korea

[4] Kyung Hee Univ, Dept Life & Nanopharmaceut Sci, Seoul 130701, South Korea

来源：

CHEMISTRY LETTERS | 2007年 / 36卷 / 09期

关键词：

D O I：

10.1246/cl.2007.1156

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We have developed novel bipolar host materials for high efficiency green phosphorescent OLEDs (PHOLEDs). Phenyl moieties were inserted in a 9,9'-(biphenyl-4,4'-diyl)dicarbazole (CBP) compound to provide much easier electron injection and to increase electron mobility. The efficiency increase and voltage reduction by this modification were observed in green PHOLEDs. At a given constant luminance of 1000 cd/m(2), the power efficiency was enhanced about twenty percent in the general green PHOLED devices.

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页码：1156 / 1157

页数：2

相关论文

共 10 条

[1] Endothermic energy transfer: A mechanism for generating very efficient high-energy phosphorescent emission in organic materials [J].

Adachi, C ;

Kwong, RC ;

Djurovich, P ;

Adamovich, V ;

Baldo, MA ;

Thompson, ME ;

Forrest, SR .

APPLIED PHYSICS LETTERS, 2001, 79 (13) :2082-2084

[2] Efficient electrophosphorescence using a doped ambipolar conductive molecular organic thin film [J].

Adachi, Chihaya ;

Kwong, Raymond ;

Forrest, Stephen R. .

ORGANIC ELECTRONICS, 2001, 2 (01) :37-43

[3] 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

[4] 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

[5] Carrier trapping and efficient recombination of electrophosphorescent device with stepwise doping profile [J].

Chin, BD ;

Suh, MC ;

Kim, MH ;

Lee, ST ;

Kim, HD ;

Chung, HK .

APPLIED PHYSICS LETTERS, 2005, 86 (13) :1-3

[6] 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

[7] Efficient low-molecule phosphorescent organic light-emitting diodes fabricated by wet-processing [J].

Hino, Y ;

Kajii, H ;

Ohmori, Y .

ORGANIC ELECTRONICS, 2004, 5 (05) :265-270

[8]

JIANHUA W, 2003, CHINESE PHYS LETT, V20, P1141

[9] Energy transfer in polymer electrophosphorescent light emitting devices with single and multiple doped luminescent layers [J].

Kawamura, Y ;

Yanagida, S ;

Forrest, SR .

JOURNAL OF APPLIED PHYSICS, 2002, 92 (01) :87-93

[10] Highly efficient, low-voltage phosphorescent organic light-emitting diodes using an iridium complex as the host material [J].

Tsuzuki, Toshimitsu ;

Tokito, Shizuo .

ADVANCED MATERIALS, 2007, 19 (02) :276-+