| Issue |
Europhys. Lett.
Volume 72, Number 5, December 2005
|
|
|---|---|---|
| Page(s) | 754 - 759 | |
| Section | Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics | |
| DOI | https://doi.org/10.1209/epl/i2005-10311-0 | |
| 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
Corresponding authors: andre.moliton@unilim.fr wassim_rammal@hotmail.com bruno.lucas@unilim.fr
Received:
10
June
2005
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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