A chemical failure mechanism for aluminum(III) 8-hydroxyquinoline light-emitting devices

被引：191

作者：

Papadimitrakopoulos, F

Zhang, XM

Thomsen, DL

Higginson, KA

机构：

[1] Department of Chemistry, Institute of Materials Science, University of Connecticut, Storrs

来源：

CHEMISTRY OF MATERIALS | 1996年 / 8卷 / 07期

关键词：

D O I：

10.1021/cm960152m

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：

A plausible degradation mechanism of aluminum(III) 8-hydroxyquinoline (Alq(3))-based devices is presented. This is initiated by traces of moisture that facilitate a ligand exchange with the oxyquinoline moiety of Alq(3), followed by a condensation polymerization of the freed 8-hydroxyquinoline (8-Hq) to produce a deep brown, nonemissive polymeric material and water (which can in turn free more 8-Hq). The polymer was found to be an efficient photoluminescence and electroluminescence quencher due to the introduction of nonemissive midgap states within the Alq(3) HOMO/LUMO levels.

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页码：1363 / &

页数：4

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