New iridium complex as high-efficiency red phosphorescent emitter in polymer light-emitting devices

被引：113
|
作者：
Liang, B [1 ]
Jiang, CY [1 ]
Chen, Z [1 ]
Zhang, XJ [1 ]
Shi, HH [1 ]
Cao, Y [1 ]
机构：
[1] S China Univ Technol, Inst Polymer Optoelect Mat & Devies, Key Lab Specially Funct Mat & Adv Mfg Technol, Guangzhou 510640, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY | 2006年 / 16卷 / 13期
关键词：
D O I：
10.1039/b515549e
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A new heteroleptic iridium complex Ir(1-piq)(2)pt with 1-phenylisoquinoline and 3-(pyridin-29-yl)1H- 1,2,4-triazole was synthesized and characterized. The complex was incorporated into phosphorescent polymer light-emitting devices using polyhedral oligomeric silsesquioxane-terminated polyfluorene (PFO-poss) as a host polymer doped with 30% of electron transport materials 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (PBD). Red electrophosphorescence was observed with a peak emission at 605 nm. The highest-efficiency polymer light-emitting diode was achieved with PFO-poss doped with 2% Ir(1-piq) 2pt. An external quantum efficiency of 10.4% and a luminous efficiency of 9.4 cd A(-1) were obtained at 10.8 mA cm(-2). These values were found to be 7.67% and 5.99 cd A(-1) at 100 mA cm(-2).
引用
收藏
页码：1281 / 1286
页数：6
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