Nondispersive electron transport in Alq3

被引:152
作者
Malliaras, GG [1 ]
Shen, YL
Dunlap, DH
Murata, H
Kafafi, ZH
机构
[1] Cornell Univ, Dept Mat Sci & Engn, Ithaca, NY 14853 USA
[2] USN, Res Lab, Div Opt Sci, Washington, DC 20375 USA
[3] Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA
[4] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AY, England
关键词
D O I
10.1063/1.1410343
中图分类号
O59 [应用物理学];
学科分类号
摘要
We have studied room temperature electron transport in amorphous films of tris (8-hydroxyquinolinolato) aluminum (III) (Alq(3)) with the time-of-flight technique. Nondispersive photocurrent transients indicate the absence of intrinsic traps in well-purified films. Exposure of the films to ambient atmosphere results in highly dispersive transport, indicating that oxygen is a likely candidate for a trapping site. The mobility was found to obey the Poole-Frenkel law. We use the correlated disorder model to determine an effective dipole moment for Alq(3), and the corresponding meridional to facial isomeric ratio. (C) 2001 American Institute of Physics.
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页码:2582 / 2584
页数:3
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