Suppression of device degradation mechanism by triphenylsilyl group substitution of the host for blue phosphorescent organic light-emitting diodes

被引：8

作者：

Byeon, Sung Yong ^{[1
]}

Lee, Kyung Hyung ^{[1
]}

Lee, Jun Yeob ^{[1
]}

机构：

[1] Sungkyunkwan Univ, Sch Chem Engn, 2066 Seobu Ro, Gyeonggi Do 16419, South Korea

来源：

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY | 2020年 / 86卷

基金：

新加坡国家研究基金会;

关键词：

Blue device; Phosphorescent host; Device lifetime; Host; EFFICIENCY; DIBENZOFURAN; DESIGN;

D O I：

10.1016/j.jiec.2020.02.021

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The effect of triphenylsilyl group substitution in the host materials for blue phosphorescent organic light-emitting diodes was studied by synthesizing two hole transport type hosts with and without the triphenylsilyl group in the identical backbone structure. The two host materials were applied as the hosts of blue phosphorescent emitter and the comparison of the emission behavior of the two hosts revealed that the triphenylsilyl group suppressed triplet exciton quenching of the blue phosphorescent emitters. As a result, the blue host with the triphenylsilyl group showed improved device efficiency and extended device lifetime in the blue phosphorescent devices. The blue phosphorescent device with the triphenylsilyl group substituted host showed improved external quantum efficiency and elongated device lifetime compared to the triphenylsilyl free host based device. The bulky triphenylsilyl group was effective to extend the device lifetime of the blue phosphorescent device through reduced triplet exciton induced annihilation. (C) 2020 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

引用

页码：144 / 149

页数：6

共 24 条

[1] Nearly 100% internal phosphorescence efficiency in an organic light-emitting device [J].

Adachi, C ;

Baldo, MA ;

Thompson, ME ;

Forrest, SR .

JOURNAL OF APPLIED PHYSICS, 2001, 90 (10) :5048-5051

[2] 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

[3] Molecular Design of Blue Phosphorescent Host Materials for Phenylimidazole-Type Blue Triplet Emitters to Extend Operational Lifetime [J].

Byeon, Sung Yong ;

Han, Si Hyun ;

Lee, Jun Yeob .

ADVANCED OPTICAL MATERIALS, 2018, 6 (12)

[4] 1,3,5-Triazine derivatives as new electron transport-type host materials for highly efficient green phosphorescent OLEDs [J].

Chen, Hsiao-Fan ;

Yang, Shang-Jung ;

Tsai, Zhen-Han ;

Hung, Wen-Yi ;

Wang, Ting-Chih ;

Wong, Ken-Tsung .

JOURNAL OF MATERIALS CHEMISTRY, 2009, 19 (43) :8112-8118

[5] Intrinsic luminance loss in phosphorescent small-molecule organic light emitting devices due to bimolecular annihilation reactions [J].

Giebink, N. C. ;

D'Andrade, B. W. ;

Weaver, M. S. ;

Mackenzie, P. B. ;

Brown, J. J. ;

Thompson, M. E. ;

Forrest, S. R. .

JOURNAL OF APPLIED PHYSICS, 2008, 103 (04)

[6] A New Phosphine Oxide Host based on ortho-Disubstituted Dibenzofuran for Efficient Electrophosphorescence: Towards High Triplet State Excited Levels and Excellent Thermal, Morphological and Efficiency Stability [J].

Han, Chunmiao ;

Xie, Guohua ;

Li, Jing ;

Zhang, Zhensong ;

Xu, Hui ;

Deng, Zhaopeng ;

Zhao, Yi ;

Yan, Pengfei ;

Liu, Shiyong .

CHEMISTRY-A EUROPEAN JOURNAL, 2011, 17 (32) :8947-8956

[7] Highly Efficient Red Phosphorescent Dopants in Organic Light-Emitting Devices [J].

Kim, Do Han ;

Cho, Nam Sung ;

Oh, Hyoung-Yun ;

Yang, Joong Hwan ;

Jeon, Woo Sik ;

Park, Jung Soo ;

Suh, Min Chul ;

Kwon, Fang Hyuk .

ADVANCED MATERIALS, 2011, 23 (24) :2721-2726

[8] The contribution of triplet-triplet annihilation to the lifetime and efficiency of fluorescent polymer organic light emitting diodes [J].

King, S. M. ;

Cass, M. ;

Pintani, M. ;

Coward, C. ;

Dias, F. B. ;

Monkman, A. P. ;

Roberts, M. .

JOURNAL OF APPLIED PHYSICS, 2011, 109 (07)

[9] Hot excited state management for long-lived blue phosphorescent organic light-emitting diodes [J].

Lee, Jaesang ;

Jeong, Changyeong ;

Batagoda, Thilini ;

Coburn, Caleb ;

Thompson, Mark E. ;

Forrest, Stephen R. .

NATURE COMMUNICATIONS, 2017, 8

[10] 1,3,4-Oxadiazole Containing Silanes as Novel Hosts for Blue Phosphorescent Organic Light Emitting Diodes [J].

Leung, Man-kit ;

Yang, Wan-Hsi ;

Chuang, Ching-Nan ;

Lee, Jiun-Haw ;

Lin, Chi-Feng ;

Wei, Mao-Kuo ;

Liu, Yu-Hao .

ORGANIC LETTERS, 2012, 14 (19) :4986-4989

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