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Vol. 146, No. 11, November 2012, pp. 90-95

 

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Structural, Morphological and Optical Properties of Spray Deposited Nano-crystalline CdO Thin Films
 

a* Maqbul A. BAROTE, b Elahipasha U. MASUMDAR

a Department of Physics, Azad college, Ausa-413520, Maharashtra, India

b Thin Film Physics Laboratory, Department of Physics, Rajarshi Shahu Mahavidyalaya - Latur-413512, Maharashtra, India

Tel.: +91 9422658959

E-mail: barotema@yahoo.com

 

Received: 16 September 2012   /Accepted: 23 November 2012   /Published: 30 November 2012

Digital Sensors and Sensor Sysstems

 

Abstract: Nanocrystalline, uniform, dense, and adherent cadmium oxide (CdO) thin films have been successfully deposited by a simple and cost effective spray pyrolysis technique. The effect of deposition temperature (250-350 0C) on structural, compositional, morphological, and optical properties of CdO thin films were studied by X-ray diffraction (XRD), Energy Dispersive Analysis by X-rays (EADX), Scanning Electron Microscopy (SEM), and UV–visible Spectroscopy (UV–vis). X-ray diffraction characterization of as-deposited CdO thin films reveals that films are of cubic structure with a (111) preferred orientation. The crystalline quality of the CdO films improves and the grain size increases with deposition temperature. These modifications influence the optical properties. The SEM images confirmed these results and showed larger grains and more crystallization for the higher deposition temperature. It has been determined that Cd and O elements are present in the solid film by using EADX. Increase in deposition temperature increased the optical transmission of the films substantially. The optical properties revealed the presence of direct band gaps with energies varied from 2.46 to 2.38 eV.

 

Keywords: Thin films, Semiconductors, X-ray techniques, Optical properties, EADX

 

 

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