Highly efficient, single-layer organic light-emitting devices based on a graded-composition emissive layer

被引：60

作者：

Erickson, Nicholas C. ^{[1
]}

Holmes, Russell J. ^{[2
]}

机构：

[1] Univ Minnesota, Dept Elect & Comp Engn, Minneapolis, MN 55455 USA

[2] Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 08期

关键词：

brightness; electroluminescence; electroluminescent devices; organic light emitting diodes; organic semiconductors; phosphorescence; ELECTROPHOSPHORESCENT DEVICES; DIODES; RED;

D O I：

10.1063/1.3481426

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate highly efficient electrophosphorescence from devices comprising a single organic layer. High efficiency is realized by combining both hole- and electron-transporting host materials (HTMs and ETMs, respectively) into a single, graded-composition emissive layer with the green phosphorescent emitter fac-tris(2-phenylpyridine) iridium (III). The composition is continuously graded to realize nearly 100% HTM at the anode and nearly 100% ETM at the cathode. Peak external quantum and power efficiencies of eta(EQE)=(19.3 +/- 0.4)% and eta(P)=(66.5 +/- 1.3) lm/W are realized at a luminance level of 600 cd/m(2). (C) 2010 American Institute of Physics. [doi:10.1063/ 1.3481426]

引用

页数：3

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