Highly efficient single-layer dendrimer light-emitting diodes with balanced charge transport

被引：123

作者：

Anthopoulos, TD

Markham, JPJ

Namdas, EB

Samuel, IDW ^{[1
]}

Lo, SC

Burn, PL

机构：

[1] Univ St Andrews, Organ Semicond Ctr, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland

[2] Univ Oxford, Dyson Perrins Lab, Oxford OX1 3QY, England

来源：

APPLIED PHYSICS LETTERS | 2003年 / 82卷 / 26期

关键词：

D O I：

10.1063/1.1586999

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

High-efficiency single-layer-solution-processed green light-emitting diodes based on a phosphorescent dendrimer are demonstrated. A peak external quantum efficiency of 10.4% (35 cd/A) was measured for a first generation fac-tris(2-phenylpyridine) iridium cored dendrimer when blended with 4,4(')-bis(N-carbazolyl)biphenyl and electron transporting 1,3,5-tris(2-N-phenylbenzimidazolyl)benzene at 8.1 V. A maximum power efficiency of 12.8 lm/W was measured also at 8.1 V and 550 cd/m2. These results indicate that, by simple blending of bipolar and electron-transporting molecules, highly efficient light-emitting diodes can be made employing a very simple device structure. (C) 2003 American Institute of Physics.

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页码：4824 / 4826

页数：3

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