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Effect of solvent volume on the optical properties of SnO2:F films deposited by a simplified spray technique

G. MURUGANANTHAM1, K.RAVICHANDRAN1,* , S. SRIRAM2, B. SAKTHIVEL1

Affiliation

  1. P.G& Research Department of Physics, AVVM Sri Pushpam College (Autonomous), Poondi, Thanjavur-613 503, Tamil Nadu, India.
  2. Department of Physics, School of EEE, SASTRA University, Thanjavur- 613 401, Tamil Nadu, India.

Abstract

Transparent conducting fluorine doped tin oxide (FTO) films are fabricated onto glass substrates using a simplified spray pyrolysis technique at a substrate temperature of 340°C. The optical constants such as refractive index, absorption coefficient, extinction coefficient are estimated using the Swanepoel method and the solvent volume dependence of these optical constants are investigated in detail and reported. The refractive index (nf) of the film is found to be in the range of 1.671-1.675. It is observed that the refractive index increases sharply near the optical absorption edge and the nf decreases with the increase in the solvent volume which may be mainly attributed to the increase in the carrier concentration. The optical band gap (3.62 – 3.70 eV) and the band edge sharpness of the films are found to be increased with the solvent volume..

Keywords

Tin oxide thin films, Absorption coefficient, Extinction coefficient and Refractive index.

Submitted at: Jan. 5, 2012
Accepted at: April 11, 2012

Citation

G. MURUGANANTHAM, K.RAVICHANDRAN, S. SRIRAM, B. SAKTHIVEL, Effect of solvent volume on the optical properties of SnO2:F films deposited by a simplified spray technique, Journal of Optoelectronics and Advanced Materials Vol. 14, Iss. 3-4, pp. 277-281 (2012)