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Some optical and dielectric properties of spray deposited tin oxide thin films

H. M. ALI1,* , E. KH. SHOKR1, A. V. MARCHENKO2

Affiliation

  1. Physics Department, Faculty of Science, Sohag University, 82524 Sohag-Egypt
  2. Alexander Herzen State Pedagogical University of Russia, 191186, St. Petersburg, Russia

Abstract

Transparent conducting tin oxide thin films have been deposited by spray pyrolysis technique. The effect of substrate temperature on the structure and optical properties of tin oxide thin films has been studied. The increase in the substrate temperature led to increase the optical transmission. A transmittance value of 84% has been obtained for spray-deposited film at 400 oC. The absorption coefficient which is used to determine the optical band gap, real dielectric constant and free carrier concentration has been calculated using four equations. An increase in the band gap and the free carrier concentration were observed by increasing the substrate temperature during deposition from 200 to 400 oC..

Keywords

Transmittance, Optical energy gap, Real dielectric constant, Free carrier concentration.

Citation

H. M. ALI, E. KH. SHOKR, A. V. MARCHENKO, Some optical and dielectric properties of spray deposited tin oxide thin films, Optoelectronics and Advanced Materials - Rapid Communications, 7, 3-4, March-April 2013, pp.207-213 (2013).

Submitted at: Oct. 29, 2012

Accepted at: April 11, 2013