Thermal quenching of electroluminescence assisted by an electric field in thin films of tris-(8-hydroxyquinolinato) aluminum (III)

被引：1

作者：

Hirai, Takeshi ^{[1
]}

Asahi, Miho ^{[1
]}

Iwasaki, Yohei ^{[1
]}

Kimura, Akira ^{[1
]}

Matsumura, Michio ^{[1
]}

机构：

[1] Osaka Univ, Res Ctr Solar Energy Chem, Osaka 5608531, Japan

来源：

JOURNAL OF LUMINESCENCE | 2009年 / 129卷 / 04期

关键词：

Tris-(8-hydroxyquinolinato) aluminum (III) (Alq(3)); Electroluminescence (EL); Photoluminescence (PL); Electric field effect; DEVICES; PHOTOLUMINESCENCE; EFFICIENCY; LUMINESCENCE; CATHODES;

D O I：

10.1016/j.jlumin.2008.11.010

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Temperature dependence of the electroluminescence (EL)-current efficiency of tris-(8-hydroxyquinolinato) aluminum (III) (Alq(3))-based organic light-emitting diodes (OLEDs) operated at a constant current density was investigated. The effects of temperature and electric field on photoluminescence (PL) efficiency of Alq(3) thin layers were also investigated. On the basis of these results, it was found that the EL efficiency decreases more markedly with increasing temperature than does PL, efficiency. The temperature dependence of the EL efficiency can be interpreted in terms of the thermal dissociation of excitons that is assisted by the electric field. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：406 / 409

页数：4

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