Magnetic field effects on emission and current in Alq3-based electroluminescent diodes

被引：305

作者：

Kalinowski, J ^{[1
]}

Cocchi, M ^{[1
]}

Virgili, D ^{[1
]}

Di Marco, P ^{[1
]}

Fattori, V ^{[1
]}

机构：

[1] Gdansk Univ Technol, Dept Mol Phys, PL-80952 Gdansk, Poland

来源：

CHEMICAL PHYSICS LETTERS | 2003年 / 380卷 / 5-6期

关键词：

D O I：

10.1016/j.cplett.2003.09.086

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The light output and the current driving tris-(8-hydroxyquinolinato) aluminum (III) (Alq(3))-based light-emitting-diodes were found to increase by up to 5% and 3%, respectively, as an external magnetic field increased to 300 mT. The positive magnetic-field effects were sensitive to the applied voltage. These observations made clear that the emissive singlet exciton formation proceeds via a correlated electron-hole pair state and the excitonic injection of electrons contributes to the driving current, the concentration of singlet excitons being modulated by the hyperfine scale magnetic-field-dependent mixing of singlet and triplet pair states constituting precursors of molecular excitons. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：710 / 715

页数：6

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