Synthesis and characterization of SnO<sub>2</sub>-ZnO composite thin films deposited via spray pyrolysis

  • Aldrin S Bendal Materials Science and Engineering Program, University of the Philippines Diliman and National Institute of Physics, University of the Philippines Diliman
  • Arven Cafe Materials Science and Engineering Program, University of the Philippines Diliman and National Institute of Physics, University of the Philippines Diliman
  • Yuta Rola Materials Science and Engineering Program, University of the Philippines Diliman and National Institute of Physics, University of the Philippines Diliman
  • Efren Suratos Materials Science and Engineering Program, University of the Philippines Diliman and National Institute of Physics, University of the Philippines Diliman
  • Horace Husay National Institute of Physics, University of the Philippines Diliman
  • Elmer Estacio National Institute of Physics, University of the Philippines Diliman
  • Arnel Salvador National Institute of Physics, University of the Philippines Diliman
  • Armando Somintac National Institute of Physics, University of the Philippines Diliman
Keywords: Composite materials, (77.84.Lf), Optical properties of thin films, (78.66.Sq), Spray Pyrolysis (82.30.Lp)

Abstract

Composite films based from tin dioxide (SnO2) and zinc oxide (ZnO) was synthesized on a glass substrate via spray pyrolysis at a substrate temperature of 350°C. SnO2-ZnO composite films were obtained by varying the volumetric amount of zinc acetate precursor solution (25 vol%, 50 vol%, and 75 vol%). The results of scanning electron microscopy and X-ray diffraction analysis showed an increase in the grain size of the composite film as the ZnO volume ratio increased. UV-Vis spectroscopy revealed a decrease in the transmittance spectra of the composite films with zinc acetate volume concentrations of 50%, which is due to thicker film achieved at 50-50 combination of the films. The optical band gap energy was computed by extrapolating the straight line in  the Tauc's plot to zero. The computed optical band gap has a decreasing trend as the ZnO volume ratio increases.

Published
2017-06-07
Section
Poster Session A (Experimental Materials Science and Photonics)