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Optical properties of transition metal (Mn, Fe and V) doped Zinc Oxide ceramics and thin films

Published online by Cambridge University Press:  15 March 2011

Neha Awasthi ,
P. Bhattacharya  and
R.S. Katiyar
Neha Awasthi
Affiliation:
Department of Physics, University of Puerto Rico, San Juan PR-00931
P. Bhattacharya
Affiliation:
Department of Physics, University of Puerto Rico, San Juan PR-00931
R.S. Katiyar
Affiliation:
Department of Physics, University of Puerto Rico, San Juan PR-00931
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Abstract

Transition metal doped (Mn, Fe and V) ZnO ceramics and their thin films were prepared by pulsed laser deposition on glass substrates. The ceramic targets did not show any additional phase formation from XRD measurement, except for high Fe concentrations. Optical absorption showed sub-band gap absorption for Mn doping. The band gap was shifted by 0.06 eV for V doped ZnO as concentration was increased to 10%. Micro Raman spectra showed some defect induced modes for all the transition metals doped ZnO ceramics. In V doped ZnO ceramics there was two phonon induced resonance Raman scattering with increase in dopant concentrations. Raman spectra for thin films did not show any significant additional modes for Mn and Fe. However V doped ZnO thin films showed an additional mode for concentration ≥5 %.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 825: Symposium G – Semiconductor Spintronics , 2004 , G2.7
Copyright
Copyright © Materials Research Society 2004

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