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
收藏
页码：361 / 367
页数：7
相关论文
共 33 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]   Engineering Efficiency Roll-Off in Organic Light-Emitting Devices [J].
Erickson, Nicholas C. ;
Holmes, Russell J. .
ADVANCED FUNCTIONAL MATERIALS, 2014, 24 (38) :6074-6080
[4]   Improving the lifetime of white polymeric organic light-emitting diodes [J].
Gather, Malte C. ;
Koeber, Sebastian ;
Heun, Susanne ;
Meerholz, Klaus .
JOURNAL OF APPLIED PHYSICS, 2009, 106 (02)
[5]  
Gong X, 2002, ADV MATER, V14, P581, DOI 10.1002/1521-4095(20020418)14:8<581::AID-ADMA581>3.0.CO
[6]  
2-B
[7]   The reduced triplet-triplet annihilation of electrophosphorescent device doped by an iridium complex with active hydrogen [J].
Han, Liangliang ;
Yang, Dongfang ;
Li, Wenlian ;
Chu, Bei ;
Chen, Yiren ;
Su, Zisheng ;
Zhang, Dongyu ;
Yan, Fei ;
Hu, Zhizhi ;
Zhang, Zhiqiang .
APPLIED PHYSICS LETTERS, 2008, 93 (15)
[8]   Quantum efficiency enhancement in top-emitting organic light-emitting diodes as a result of enhanced intrinsic quantum yield [J].
Huang, Qiang ;
Reineke, Sebastian ;
Walzer, Karsten ;
Pfeiffer, Martin ;
Leo, Karl .
APPLIED PHYSICS LETTERS, 2006, 89 (26)
[9]   Highly efficient phosphorescence from organic light-emitting devices with an exciton-block layer [J].
Ikai, M ;
Tokito, S ;
Sakamoto, Y ;
Suzuki, T ;
Taga, Y .
APPLIED PHYSICS LETTERS, 2001, 79 (02) :156-158
[10]   Low roll-off efficiency green phosphorescent organic light-emitting devices with simple double emissive layer structure [J].
Jeon, Woo Sik ;
Park, Tae Jin ;
Kim, Sun Young ;
Pode, Ramchandra ;
Jang, Jin ;
Kwon, Jang Hyuk .
APPLIED PHYSICS LETTERS, 2008, 93 (06)
1234