Volume 72, Number 5, December 2005
|Page(s)||754 - 759|
|Section||Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics|
|Published online||04 November 2005|
A new method for the determination of electronic mobility in organic materials associated with optoelectronic devices
Université de Limoges, Faculté des Sciences et Techniques, CNRS - FRE 2701 Laboratoire UMOP - 123 Av. Albert Thomas, 87060 Limoges, France
Accepted: 5 October 2005
It is proposed, by way of studies made using tris(8-hydroxyquinoline) aluminium (Alq3) in an ITO/Alq3/Al structure, that dielectric spectroscopy (represented by ) and a determination of characteristics permit a good estimation of charge mobility (. The value of μ determined by this new method was found to be ca. cm2 V-1 s-1, without bias voltage. This method also allows a facile determination of field effects, and it was possible to demonstrate that μ followed a Poole-Frenkel law. In addition, mobilities determined via field effects alone generally led to overestimation of around one order of magnitude for an electric field of around 1 V cm-1.
PACS: 42.70.Jk – Polymers and organics / 72.80.Le – Polymers; organic compounds (including organic semiconductors) / 85.60.Jb – Light-emitting devices
© EDP Sciences, 2005
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