Highly efficient green phosphorescent organic electroluminescent devices with a terbium complex as the sensitizer

被引：23

作者：

Cui, Rongzhen ^{[1
]}

Liu, Weiqiang ^{[1
]}

Zhou, Liang ^{[1
]}

Li, Yanan ^{[1
]}

Jiang, Yunlong ^{[1
]}

Zhao, Xuesen ^{[1
]}

Cui, Yingjie ^{[1
]}

Zhu, Qi ^{[1
]}

Zheng, Youxuan ^{[2
]}

Deng, Ruiping ^{[1
]}

Zhang, Hongjie ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Renmin St 5625, Changchun 130022, Peoples R China

[2] Nanjing Univ, Sch Chem & Chem Engn, Collaborat Innovat Ctr Adv Microstruct, State Key Lab Coordinat Chem, Nanjing 210023, Jiangsu, Peoples R China

来源：

DYES AND PIGMENTS | 2017年 / 136卷

基金：

中国国家自然科学基金;

关键词：

Electroluminescence; Terbium complex; Iridium complex; Carrier trapping; Efficiency; LIGHT-EMITTING-DIODES; ROLL-OFF; HIGH-BRIGHTNESS; OLEDS; MECHANISM; EMISSION; EXCITONS; LEDS;

D O I：

10.1016/j.dyepig.2016.08.068

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

An effective device design strategy was reported to realize high performance green organic light emitting diodes based on iridium complex by employing a trivalent terbium complex as the sensitizer. The low-lying energy levels of utilized terbium complex are beneficial in broadening recombination zone and facilitating carriers' balance on emitter molecules. No terbium ion characteristic emission was observed in co-doped devices ascribed to high triplet energy of the ligand of terbium complex. Consequently, the 0.4 wt% co-doped single light-emitting layer device obtained the maximum external quantum efficiency, current efficiency and power efficiency up to 27.6%, 114.23 cd/A and 101.92 Im/W, respectively. At 3.8 V, this device realized the practical brightness of 1000 cd/m(2) with inspiring external quantum efficiency and current efficiency as high as 27.5% and 113.71 cd/A, respectively. While the 0.2 wt % co-doped double light-emitting layers device displayed relatively lower efficiency, but higher brightness up to 205,629 cd/m(2). (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：361 / 367

页数：7

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