Energy transfer and charge trapping in dye-doped organic light-emitting diodes

被引：4

作者：

Wei, B ^{[1
]}

Furukawa, K ^{[1
]}

Ichikawa, M ^{[1
]}

Koyama, T ^{[1
]}

Taniguchi, Y ^{[1
]}

机构：

[1] Shinshu Univ, Fac Text Sci & Technol, Dept Funct Polymer Sci, Ueda, Nagano 386, Japan

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2005年 / 426卷

关键词：

charge trapping; concentration; dopant; energy transfer; organic light-emitting diodes;

D O I：

10.1080/15421400590891335

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

This paper describes the mechanism of energy transfer and charge trapping in dye-doped organic light-emitting diodes with two dopants, rubrene and coumarin-6. The current efficiency is found to improve significantly compared to undoped cell, which reaches 6.4 cd/A anal 9.0 cd/A at 100 mA/cm(2) for the rubrene and coumarin-6 doped cells, respectively. The dopant concentration affects the device performance by changing the location, of recombination zone and self-quenching effect. Transient, response of pulsed cells shows that, carrier trapping changes the detection tinge of electroluminescence significantly at low voltage. The potential application of doped organic cells in optic-electric conversion is developed.

引用

页码：295 / 302

页数：8

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