Phosphorescent Blue Organic Light-Emitting Diodes with New Bipolar Host Materials

被引：5

作者：

Yu, Eun-Sun ^{[2
]}

Jung, Sung-Hyun ^{[2
]}

Chae, Mi-Young ^{[2
]}

Jeon, Woo Sik ^{[1
]}

Kulshreshtha, Chandramouli ^{[1
]}

Park, Jung-Soo ^{[1
]}

Kwon, Jang Hyuk ^{[1
]}

机构：

[1] Kyung Hee Univ, Dept Informat Display, Seoul 130701, South Korea

[2] Cheil Ind Inc, Uiwang Si 3322, Gyeonggi Do, South Korea

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2012年 / 12卷 / 02期

关键词：

Phosphorescent OLED; Bipolar Host; Triplet Energy; DEVICES; OLEDS; PERFORMANCE;

D O I：

10.1166/jnn.2012.4586

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report narrow band gap bipolar host materials, CbPr-3 (9,9'-[(3,3'-Biphenyl-3.3'-yl-bipyridine)-1,3-biphenyl]bis-9H-carbazole) and Bim-4 (9,9'-[5-(1-phenyl-1H-benzimadazol-2yl)-1,3-phenylene]bis-9H-carbazole), for blue phosphorescent OLEDs application. These two bipolar hosts have high triplet energy of >= 2.9 eV, capable of reducing the driving voltages and improving efficiencies. Significant low driving voltages of 7.4 and 6.6 V were obtained for CbPr-3 and Bim-4 hosts, compared with 9.0 V of the commonly used host, mCP (1,3-bis(9-carbazolyl)benzene). At a given constant luminance of 1000 cd/m(2), the power efficiency of both the bipolar host devices was enhanced by 2.5 times.

引用

页码：1361 / 1364

页数：4

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