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Non radiative recombination centers in ZnO nanorods

Published online by Cambridge University Press:  22 April 2013

D. Montenegro
Affiliation:
Departamento de Física Aplicada y Electromagnetismo, Universitat de Valencia, Dr. Moliner 50, 46100 Burjassot, Spain
V. Hortelano
Affiliation:
GdS-Optronlab, Departamento Física Materia Condensada, Edificio I+D, Universidad de Valladolid, Paseo de Belén 1, 47011, Valladolid, Spain
O. Martínez
Affiliation:
GdS-Optronlab, Departamento Física Materia Condensada, Edificio I+D, Universidad de Valladolid, Paseo de Belén 1, 47011, Valladolid, Spain
M. C. Martínez-Tomas
Affiliation:
Departamento de Física Aplicada y Electromagnetismo, Universitat de Valencia, Dr. Moliner 50, 46100 Burjassot, Spain
V. Sallet
Affiliation:
Groupe d'Etude de la Matière Condensée (GEMAC), CNRS-Université de Versailles St-Quentin, 45 avenue des Etats-Unis, 78035 Versailles Cedex, France
V. Muñoz
Affiliation:
Departamento de Física Aplicada y Electromagnetismo, Universitat de Valencia, Dr. Moliner 50, 46100 Burjassot, Spain
J. Jiménez
Affiliation:
GdS-Optronlab, Departamento Física Materia Condensada, Edificio I+D, Universidad de Valladolid, Paseo de Belén 1, 47011, Valladolid, Spain
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Abstract

Nowadays, the nature of the non radiative recombination centres in ZnO is a matter of controversy; they have been related to extended defects, zinc vacancy complexes, and surface defects, among other possible candidates. We present herein the optical characterization of catalyst free ZnO nanorods grown by atmospheric MOCVD by microRaman and cathodoluminescence spectroscopies. The correlation between the defect related Raman modes and the cathodoluminescence emission along the nanorods permits to establish a relation between the non radiative recombination centers and the defects responsible for the local Raman modes, which have been related to Zn interstitial complexes.

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Articles
Copyright
Copyright © Materials Research Society 2013 

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References

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