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A Study of the Photoluminescence and Reflectivity Spectra of MOCVD Grown MnSe

Published online by Cambridge University Press:  22 February 2011

M. Di Blasio ,
L. Aigouy ,
M. Averous ,
J. Calas ,
P. Tomasini ,
A. Haidoux  and
J.C. Tedenac
M. Di Blasio
Affiliation:
Université Montpellier II, Groupe d'Etudes des Semiconducteurs, URA 357 du CNRS, Place E. Bataillon, 34095 Montpellier Cedex 5
L. Aigouy
Affiliation:
Université Montpellier II, Groupe d'Etudes des Semiconducteurs, URA 357 du CNRS, Place E. Bataillon, 34095 Montpellier Cedex 5
M. Averous
Affiliation:
Université Montpellier II, Groupe d'Etudes des Semiconducteurs, URA 357 du CNRS, Place E. Bataillon, 34095 Montpellier Cedex 5
J. Calas
Affiliation:
Université Montpellier II, Groupe d'Etudes des Semiconducteurs, URA 357 du CNRS, Place E. Bataillon, 34095 Montpellier Cedex 5
P. Tomasini
Affiliation:
Laboratoire de Physicochimie des Materiaux Solide, URA 407 du CNRS, Place E. Bataillon, 34095 Montpellier Cedex 5
A. Haidoux
Affiliation:
Laboratoire de Physicochimie des Materiaux Solide, URA 407 du CNRS, Place E. Bataillon, 34095 Montpellier Cedex 5
J.C. Tedenac
Affiliation:
Laboratoire de Physicochimie des Materiaux Solide, URA 407 du CNRS, Place E. Bataillon, 34095 Montpellier Cedex 5
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Abstract

Photoluminescence (PL) experiments at 2K are performed on MOCVD grown MnSe. The precursors used in the growth stage are methylpentacarbonylmanganese and diethylselenide. Pyrolysis of the percursors is realized inside a gradient reactor under a constant H2 flux, between 280-55°TC. The compound is epitaxially grown on various substrates (Si, InP, GaSb, GaAs, ZnTe/GaAs, etc.). On some of these samples the compound presents a zinc blende structure, while in the other samples rock salt formation has been identified. The first substrate is used because of its interest in Si technology, while the others are used because MnSe can be grown in the zinc blende phase for very thin layers. For the first time x-ray diffraction data has allowed us to determine the lattice constant of zincblende MnSe (aMnse (oct)=5.818Å), confirming the close approximation (a ∼ 5.9Å) used from the Zn1-xMnxSe alloy. These compounds have visible Mn++ transitions at 2.12-5eV; other features are also visible at 2.3-4, 2.7, and 3.0eV. The energy gap transition of tetrahedral thin film layers of MnSe is seen for the first time in PL spectra. A temperature dependant PL study is performed on MnSe in the 2-200K range. Reflectivity experiments are used to attempt to identify the internal manganese transitions. A qualitative PL analysis of the samples grown at different temperatures and on different substrates is provided. A Stokes shift is encountered when the results are compared.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 340: Symposium E – Compound Semiconductor Epitaxy , 1994 , 527
Copyright
Copyright © Materials Research Society 1994

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References

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