Improved electron injection in polymer light-emitting diodes using anionic conjugated polyelectrolyte

被引：24

作者：

Jin, Youngeup ^{[1
]}

Bazan, Guillermo C. ^{[1
]}

Heeger, Alan J. ^{[1
]}

Kim, Jin Young ^{[2
]}

Lee, Kwanghee ^{[2
]}

机构：

[1] Univ Calif Santa Barbara, Ctr Polymers & Organ Solids, Santa Barbara, CA 93106 USA

[2] GIST, Dept Mat Sci & Engn, Heeger Ctr Adv Mat, Kwangju 500712, South Korea

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 12期

关键词：

D O I：

10.1063/1.2989133

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report improved performance in polymer light-emitting diodes incorporating conjugated polyelectrolytes as an electron injection layer (EIL). When we introduce water soluble conjugated polymers, poly[9,9'-bis(4-sulfonatobutyl)fluorene-co-alt-1,4-phenylene] (anionic PFP), between the aluminum (Al) cathode and emissive layer, the devices show an increased electroluminescence efficiency with a lowered turn-on voltage. We believe the mobile Na+ ions in the EIL layer directly influences the device efficiency by forming a low work function layer at the interface between the EIL and Al cathode, thereby facilitating the electron injection into the emissive layer. (C) 2008 American Institute of Physics.

引用

页数：3

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