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Synthesis of Mn2+ Doped CdS Nanocrystals Embedded in a Sol-Gel Silica Matrix: Characterization of the Luminescence Activator

Published online by Cambridge University Press:  15 February 2011

G. Counio ,
S. Esnouf ,
T. Gacoin ,
P. Barboux ,
A. Hofstaetter  and
J.-P. Boilot
G. Counio
Affiliation:
Laboratoire de Physique de la Matière Condensée, C.N.R.S.U.R.A.1254D, Ecole Polytechnique, 91128 Palaiseau, France.
S. Esnouf
Affiliation:
Laboratoire de Physique de la Matière Condensée, C.N.R.S.U.R.A.1254D, Ecole Polytechnique, 91128 Palaiseau, France.
T. Gacoin
Affiliation:
Laboratoire de Physique de la Matière Condensée, C.N.R.S.U.R.A.1254D, Ecole Polytechnique, 91128 Palaiseau, France.
P. Barboux
Affiliation:
Laboratoire de Physique de la Matière Condensée, C.N.R.S.U.R.A.1254D, Ecole Polytechnique, 91128 Palaiseau, France.
A. Hofstaetter
Affiliation:
1. Physics Institute, University of Giessen, D 35392 Giessen, Germany.
J.-P. Boilot
Affiliation:
Laboratoire de Physique de la Matière Condensée, C.N.R.S.U.R.A.1254D, Ecole Polytechnique, 91128 Palaiseau, France.
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Abstract

Mn2+-doped CdS nanocrystals (1.2 to 2.4 nm in diameter) embedded in organic-inorganic silica xerogels have been synthesized. Extensive studies (EXAFS, ESR and ENDOR) allow us to localize the ions responsible for the bright luminescence observed in such materials (quantum yield of 7%). The average number of Mn2+ per nanocrystal is in the 0.2–0.8 range, and the emission arises from an energy transfer from surface trapped carriers to Mn2+ ions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 452 , 1996 , 311
Copyright
Copyright © Materials Research Society 1997

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References

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