High-efficiency top-emissive white-light-emitting organic electrophosphorescent devices

被引：155

作者：

Kanno, H ^{[1
]}

Sun, Y ^{[1
]}

Forrest, SR ^{[1
]}

机构：

[1] Princeton Univ, Dept Elect Engn, PRISM, Princeton, NJ 08544 USA

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 26期

关键词：

D O I：

10.1063/1.1947376

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate an efficient, top-emissive, white-light-emitting organic device (WOLED) employing the phosphorescent emitters, tris-(1-(4,6-difluorophenyl)dpyridinato,N,C2 ')iridium(III) and iridium(III) biss(2-phenyl quinolyl-N,C2 ')acetylacetonate combining a sputtered Ni anode and an ITO cathode. The electron transport layer is doped with Li for efficient electron injection from the cathode, thereby also avoiding strong microcavity effects. The operating voltage is substantially reduced compared with a top-emissive device with an undoped electron transport layer. Peak external quantum and power efficiencies of 10.5 +/- 1.0% and 9.8 +/- 1.0 lm/W are achieved at current densities of 1.6 and 1.0 mA/cm(2), respectively. The emission is characterized by Commission Internationale de L'Eclairage coordinates of (x=0.42, y=0.39). The top-emissive device, useful for generating full color images when combined with color filters or for display backlights, exhibits characteristics competitive with those of a bottom-emission WOLED using the same multilayer structure. (c) 2005 American Institute of Physics.

引用

页码：1 / 3

页数：3

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