Lithium salt doped conjugated polymers as electron transporting materials for highly efficient blue polymer light-emitting diodes

被引：32

作者：

Huang, Fei ^{[1
]}

Shih, Ping-I ^{[1
,2
]}

Liu, Michelle S. ^{[1
]}

Shu, Ching-Fong ^{[2
]}

Jen, Alex K. -Y. ^{[1
]}

机构：

[1] Univ Washington, Inst Adv Mat & Technol, Dept Mat Sci & Engn, Seattle, WA 98195 USA

[2] Natl Chiao Tung Univ, Dept Appl Chem, Hsinchu 300, Taiwan

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 24期

基金：

美国国家科学基金会;

关键词：

conducting polymers; current density; lithium compounds; organic light emitting diodes; phosphorescence;

D O I：

10.1063/1.3050452

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Highly efficient blue polymer light-emitting diodes (PLEDs) are fabricated using a conjugated polymer, poly[9,9-bis(2-(2-(2-diethanol-amino-ethoxy) ethoxy) ethyl) fluorene-alt-4, 4(')-phenylether] as an electron transporting layer (ETL). It was found that the performance of these blue-emitting devices could be greatly improved if the ETL was doped with LiF or Li2CO3 salts. A bis[(4,6-di-fluorophenyl)-pyridinato-N, C-2] (picolinate) Ir(III) (FIrpic) complex based blue phosphorescent PLED exhibited a maximum luminance efficiency of 20.3 cd/A with a luminance of 1600 cd/m(2) at the current density of 7.9 mA/cm(2) and drive voltage of 8.0 V.

引用

页数：3

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