Extrinsic electron traps in tris(8-hydroxyquinoline) aluminium

被引：38

作者：

Fong, H ^{[1
]}

Lun, K ^{[1
]}

So, SK ^{[1
]}

机构：

[1] Hong Kong Baptist Univ, Dept Phys, Kowloon, Hong Kong, Peoples R China

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 2002年 / 41卷 / 10A期

关键词：

carrier mobility; organic transporting materials; hydroxyquinoline aluminum;

D O I：

10.1143/JJAP.41.L1122

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Optical time-of-flight (TOF) technique was used to measure the electron mobility of tris(8-hydroxyquinoline) aluminium (Alq(3)) exposed to different gases. When freshly prepared Alq3 sample was exposed to air, the TOF signal vas observed to be highly dispersive. After annealing the sample to 370 K for 12 h, the signal became non-dispersive. The field dependence of the electron mobility was found to exhibit Poole-Frenkel form between 250-380 K. The effects of various ambient gases (N-2, O-2, H2O) to the electron mobility were examined. It is found that O-2 acts as an extrinsic dopant and induces electron traps in bulk Alq(3).

引用

页码：L1122 / L1125

页数：4

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