Thermal and morphological effects on the hydrolytic stability of aluminum tris(8-hydroxyquinoline) (Alq3)

被引：106

作者：

Higginson, KA ^{[1
]}

Zhang, XM ^{[1
]}

Papadimitrakopoulos, F ^{[1
]}

机构：

[1] Univ Connecticut, Inst Mat Sci, Polymer Sci Program, Dept Chem, Storrs, CT 06269 USA

来源：

CHEMISTRY OF MATERIALS | 1998年 / 10卷 / 04期

关键词：

D O I：

10.1021/cm970599a

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：

An investigation into the physical and chemical characteristics of aluminum tris(8-hydroxyquinoline) (Alq(3)), a reliable electron-transporting and emitting material for low molecular weight based organic light-emitting diodes (OLEDs), was performed. In the presence of atmospheric moisture, the thermal stability of Alq(3) was studied by monitoring the evolution of its volatile byproduct, 8-hydroxyquinoline (8-Hq), using thermogravimetric analysis and gas chromatography/mass spectroscopy (GC/MS). Sample morphology was shown to be an important parameter in the stability of Alq(3). Annealed (more crystalline) samples exhibited greater stability to hydrolysis than freshly sublimed films, at the expense of photoluminescence efficiency. The possible implications of these phenomena are discussed with respect to failure mechanisms of Alq(3)-based OLEDs.

引用

页码：1017 / 1020

页数：4

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