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Electronic Structure of O-D Exciton Ground State in CdSe Nanocrystals

Published online by Cambridge University Press:  15 February 2011

M. Chamarro ,
M. Dib ,
C. Gourdon ,
P. Lavallard ,
O. Lublinskaya  and
A. I. Ekimov
M. Chamarro
Affiliation:
Universités Paris VI-VII, Groupe de Physique des Solides, 75251 Paris France
M. Dib
Affiliation:
Universités Paris VI-VII, Groupe de Physique des Solides, 75251 Paris France
C. Gourdon
Affiliation:
Universités Paris VI-VII, Groupe de Physique des Solides, 75251 Paris France
P. Lavallard
Affiliation:
Universités Paris VI-VII, Groupe de Physique des Solides, 75251 Paris France
O. Lublinskaya
Affiliation:
A.F. Ioffe Physical-Technical Institute, 194021 St Petersburg, Russian Federation
A. I. Ekimov
Affiliation:
A.F. Ioffe Physical-Technical Institute, 194021 St Petersburg, Russian Federation
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Abstract

We present results on photoluminescence excitation spectra (PLE) of wurtzite CdSe nanocrystals (NCs) embedded in a glass with effective radii in the range 15–35 Å. Information on the near band-gap absorption of an assembly of NCs is obtained by selecting a narrow energy range in the inhomogeneously broadened photoluminescence band. The size and shape dependence of the lowest exciton states are calculated for slightly non-spherical wurtzite NCs. The experimental results are in good agreement with the theoretical predictions when both shape and size dispersions are taken into account.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 452 , 1996 , 341
Copyright
Copyright © Materials Research Society 1997

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References

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