Equivalent circuits of polymer light-emitting diodes with hole-injection layer studied by impedance spectroscopy

被引：25

作者：

Okachi, Takayuki ^{[1
]}

Nagase, Takashi ^{[1
,2
]}

Kobayashi, Takashi ^{[1
,2
]}

Naito, Hiroyoshi ^{[1
,2
]}

机构：

[1] Osaka Prefecture Univ, Dept Phys & Elect, Naka Ku, Osaka 5998531, Japan

[2] Osaka Prefecture Univ, Res Inst Mol Elect Devices, Naka Ku, Osaka 5998531, Japan

来源：

THIN SOLID FILMS | 2008年 / 517卷 / 04期

基金：

日本学术振兴会;

关键词：

Impedance spectroscopy; Polymer light-emitting diodes; Equivalent circuit; Poly(9,9-dioctylfluorene) (F8);

D O I：

10.1016/j.tsf.2008.09.019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Impedance spectroscopy (IS) of poly(9,9-dioctylfluorene) (F8) polymer light-emitting diodes (PLEDs) with hole-injection layers has been studied to determine their equivalent circuits. The equivalent circuits of the PLEDs below and above the threshold voltage for electroluminescence (EL) and their physical interpretation are shown. A significant difference in equivalent circuits is observed between below and above the threshold for EL. Above EL threshold, two R-L series branches, which are the origin of the negative capacitance effect, appear in the equivalent circuit. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：1327 / 1330

页数：4

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