PHYSIOCHEMICAL PROPERTIES OF TIN OXIDE THIN FILMS DEPOSITED BY SPRAY PYROLYSIS

Abstract

In this article, tin oxide film is deposited onto glass substrates at 350ºC by spray pyrolysis technique. The nature of nanoparticles is investigated using X-ray diffraction, UV-visible spectroscopy, and Fourier transforms infrared spectra. XRD studies are shown that the thin film orientations along (110), (101), (200), (211), (220), (310), (301), and (321) planes. The phase structure is polycrystalline with tetragonal rutile. The average crystallite sizes are determined. Field emission scanning electron microscopy analysis shows that SnO2 thin film with irregular grains and irregular shapes was found. A Fourier transform infrared spectra characteristics for pure SnO2 thin films explains various vibrational assignment modes. Energy dispersive spectroscopy analysis confirms the elements of deposited thin films on the glass substrate. UV visible absorption spectra show that the band gap of SnO2 thin film is 3.57 eV. The SnO2 thin films are prepared using a simple and economical technique with the advantage that they are used for optoelectronic devices and gas sensor applications.