High-efficiency red electroluminescence from europium complex containing a neutral dipyrido(3,2-a:2′,3′-c)phenazine ligand in PLEDs

被引：23
|
作者：
Liu, Yu [1 ]
Wang, Yafei [1 ]
He, Juan [1 ]
Mei, Qingqing [1 ]
Chen, Kai [1 ]
Cui, Jiaojiao [1 ]
Li, Chun [2 ]
Zhu, Meixiang [1 ]
Peng, Junbiao [2 ]
Zhu, Weiguo [1 ]
Cao, Yong [2 ]
机构：
[1] Xiangtan Univ, Minist Educ, Dept Chem, Key Lab Environm Friendly Chem & Applicat, Xiangtan 411105, Peoples R China
[2] S China Univ Technol, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China
来源：
ORGANIC ELECTRONICS | 2012年 / 13卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Europium(III) complex; Optophysical properties; Electroluminescence; Polymer light-emitting devices; ENERGY-TRANSFER; IRIDIUM COMPLEX; BRIGHT; DYE; ELECTROPHOSPHORESCENCE; LUMINESCENCE; EMITTER; SINGLET; STATE; HOST;
D O I：
10.1016/j.orgel.2012.02.024
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to obtain high-efficiency monochromatic red emission in polymer light-emitting devices, a tris(dibenzoylmethanato)(dipyrido(3,2-a:2',3'-c) phenazine) europium [Eu(DBM)(3) (DPPZ)] doped single-emissive-layer devices were fabricated using a blend of poly(9,9-dioctyl- fluorence) and 2-tert-butyl-phenyl-5-biphenyl-1,3,4-oxadiazole as a host matrix by solution process. Significantly improved electro-luminescent properties with sharp red emission at 611.5 nm were displayed in the Eu(DBM)(3)(DPPZ)-doped devices at dopant concentrations from 1 to 8 wt.%. The highest luminance up to 1783 cd/m(2) at 2 wt.% dopant concentration, as well as the maximum external quantum efficiency of 2.5% and current efficiency of 3.8 cd/A were obtained at 1 wt.% dopant concentration. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：1038 / 1043
页数：6
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