Table of Contents
Indian Journal of Materials Science
Volume 2013 (2013), Article ID 405147, 6 pages
http://dx.doi.org/10.1155/2013/405147
Research Article

Study of Structural and Optoelectronic Properties of ZnO Codoped with Ca and Mg

1P. G. Department of Physics, Patna Science College, Patna University, Patna-800005, Bihar, India
2Aryabhatta Centre for Nanoscience and Nanotechnology, Aryabhatta Knowledge University, Patna, Bihar, India
3Material Research Centre, Brno University of Technology, Brno, Czech Republic
4Physics Department, R. R. M. Campus, Janakpur District, Dhanusha, Nepal
5Nanotechnology Application Centre, Allahabad University, Allahabad, Uttar Pradesh, India

Received 1 August 2013; Accepted 1 September 2013

Academic Editors: M. Jayachandran and K. Kalantar-Zadeh

Copyright © 2013 Manoj Kumar Mishra et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

ZnO codoped with Ca and Mg in various proportions was prepared by a chemical method and annealed at 600 C. The structural and optical properties of these oxide samples were systematically studied by XRD, SEM, EDS, and PL spectrometer. XRD pattern shows a hexagonal wurtzite structure. The size of particle as shown by XRD machine and calculated by Scherer’s formula is found in the nano range. The formation of particles showed that they were polycrystalline. Due to larger ionic and covalent radii of Ca than those of Zinc, a lattice deformation occurs with the development of strain field. New phases were observed in XRD pattern of few samples ZnO-2.2 and ZnO-2.4. SEM micrograph shows the formation of nanoparticles. EDS study confirms the codoping of ZnO with Ca and Mg. Optical properties like photoluminescence emission showed a blue shift in peak wavelength. General conductivity and photoconductivity were found high in samples containing certain proportion of Ca and Mg in comparison with pure ZnO.