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D.C Current-Voltage Characteristics and Admittance Spectroscopy of an Al-Porous Si Barrier

Published online by Cambridge University Press:  15 February 2011

K. Khirouni
Affiliation:
Laboratoire des Semiconducteurs, Faculté des Sciences de Monastir, Route de Kairouan, 5000 Monastir, Tunisia.
J. C. Bourgoin
Affiliation:
Groupe de Physique des Solides, Universités Paris 6 et Paris 7, Tour 23, 2 place Jussieu, 75251 Paris Cedex 05, France
K. Borgi
Affiliation:
Laboratoire des Semiconducteurs, Faculté des Sciences de Monastir, Route de Kairouan, 5000 Monastir, Tunisia.
H. Maaref
Affiliation:
Laboratoire des Semiconducteurs, Faculté des Sciences de Monastir, Route de Kairouan, 5000 Monastir, Tunisia.
D. Deresmes
Affiliation:
I.E.M.N., Département I.S.E.N., C.N.R.S. (UMR 9929), Avenue Poincaré, Cité Scientifique, BP 69, 59652 Villeneuve d'Ascq Cedex, France.
D. Stiévenard
Affiliation:
I.E.M.N., Département I.S.E.N., C.N.R.S. (UMR 9929), Avenue Poincaré, Cité Scientifique, BP 69, 59652 Villeneuve d'Ascq Cedex, France.
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Abstract

We present the temperature and frequency dependence of the current-voltage (I-V) characteristics of Al barriers deposited on porous Si grown on p-type Si substrates. These barriers exhibit a rectifying behaviour when the temperature is higher than 250 K. The I-V characteristics can be understood by a conduction in porous Si taking place via free electrons thermally excited from Pb centers associated with the existence of a SiO2-Si interface and via hopping between these Pb centers.

Type
Research Article
Copyright
Copyright © Materials Research Society 1997

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References

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