Indenocarbazole based bipolar host materials for highly efficient yellow phosphorescent organic light emitting diodes

被引：11

作者：

Kim, Gyeong Heon ^{[1
]}

Lampande, Raju ^{[1
]}

Kang, Byoung Yeop ^{[1
]}

Bae, Hyeong Woo ^{[1
]}

Lee, Ju Young ^{[1
]}

Kwon, Jang Hyuk ^{[1
]}

Park, Jung Hwan ^{[2
]}

机构：

[1] Kyung Hee Univ, Dept Informat Display, 26 Kyungheedae Ro, Seoul 130701, South Korea

[2] Duksan Neolux Co Ltd, 21-32 Ssukgol Gil, Cheonan Si 331821, Chungcheongnam, South Korea

来源：

ORGANIC ELECTRONICS | 2016年 / 31卷

关键词：

Bipolar host; Indenocarbazole; Phosphorescence; Organic light-emitting diodes; Triplet energy; DENSITY; EXCHANGE; DEVICES; GREEN;

D O I：

10.1016/j.orgel.2016.01.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report bipolar host materials with robust indenocarbazole and biphenyl moiety as hole-electron-transporting unit for phosphorescent yellow organic light-emitting diodes (OLEDs). New host materials demonstrated an excellent morphological stability with high glass transition temperature of 207 degrees C. Simultaneously, it also revealed appropriate triplet energy of about 2.6 eV for ideal triplet energy transfer to yellow phosphorescent dopant. A phosphorescent yellow OLED with new host ICBP1 (and ICBP2) and conventional yellow dopant iridium(III) bis(4-(4-t-butylphenyl) thieno[3,2-c] pyridinato-N, C2') acetylacetonate (Ir(tptpy)(2)acac) shows a low driving voltage of 3.4 (and 3.6 V) at 1000 cd/m(2), and maximum external quantum efficiency as high as 26.4%. Such efficient performance of phosphorescent yellow OLEDs is attributed to a good charge balance and high electron transport properties of host materials. (c) 2016 Elsevier B.V. All rights reserved.

引用

页码：11 / 18

页数：8

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