Very high-efficiency organic light-emitting diodes based on cyclometallated rhenium (I) complex

被引：39

作者：

Li, Xiao ^{[1
,2
]}

Zhang, Dongyu ^{[1
,2
]}

Li, Wenlian ^{[1
,2
]}

Chu, Bei ^{[1
,2
]}

Han, Liangliang ^{[1
,2
]}

Zhu, Jianzhuo ^{[1
,2
]}

Su, Zisheng ^{[1
,2
]}

Bi, Defeng ^{[1
,2
]}

Wang, Dan ^{[1
,2
]}

Yang, Dongfang ^{[1
,2
]}

Chen, Yiren ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Key Lab Excited State Proc, Changchun Inst Opt Fine Mech & Phys, Changchun 130033, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 08期

关键词：

D O I：

10.1063/1.2888767

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A phosphorescent (Ph) cyclometallated rhenium (1) (Re-I) complex was synthesized by reacting 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline with pentacarbonylbromorhenium in refluxing toluene solutions. The precipitates were easily sublimed to obtain a pure electrically neutral carbonyl diamine Re-I complex, (2,9-dimethyl-4,7-diphenyl-1, 10-phenanthroline)Re(CO)(3)Br. The Re complex was used as an orange emitting dopant in 4,4'-N,N'-dicarbazole-biphenyl host to fabricate Ph organic light-emitting diodes (PhOLEDs). The maximum electroluminescence (EL) efficiency and luminance of 21.8 cd/A and 8315 cd/cm(2) were harvested, respectively, which were the highest EL results among the PhOLEDs based on Re-I complexes. The improvements of the EL performances could be ascribed to the synergistic effects of together incorporation of two reciprocally repulsive phenyl and methyl groups on the backbone of 1,10-phenanthroline molecule of the ligand. (c) 2008 American Institute of Physics.

引用

页数：3

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