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Physical properties of V2O5 sprayed films

A. ASHOUR1,* , N. Z. EL-SAYED1

Affiliation

  1. Physics Department, Faculty of Science, Minia University, Minia, Egypt

Abstract

Thin films of V2O5 have been deposited by spray pyrolysis technique on glasses substrate with different solution concentrations (molarities) at temperature equal 300 oC. The structural, electrical and optical characteristics of the V2O5 films were examined by X-ray diffraction (XRD), Van der Pauw technique and double-beam spectrophotometry. X-ray diffraction reveals that the films, which have been deposited at TS = 300 oC with different solution molarities are polycrystalline in nature having orthorhombic type crystal structure and a preferential orientation along <001> direction. The electrical resistivity at room temperature is decreased as the solution molarity increased. Transmission measurements showed that the transmission decreased as the molarity increased. The dependence of the refractive index, n, and extinction coefficient, k, on the wavelength for a sprayed film is also reported. Optical bandgap, Eg, has been reported for the V2O5 films and is equal to 2.50 eV..

Keywords

V2O5 films; Spray pyrolysis; XRD; Electrical and optical properties.

Submitted at: June 8, 2008
Accepted at: March 24, 2009

Citation

A. ASHOUR, N. Z. EL-SAYED, Physical properties of V2O5 sprayed films, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 3, pp. 251-256 (2009)