Optical and structural properties of sno2 thin films deposited by spray pyrolysis technique: Effect of solution concentration

This article presents the elaboration of tin oxide (SnO2) thin films on glass substrates by spray pyrolysis technique. Our interest is on the investigation of Effect solution concentration on the structural, optical and morphological properties of the films. Structural analysis by X-ray diffraction showed that the deposited films are polycrystalline in nature with a tetragonal structure having a preferential orientation along with (1 1 0) plane. SEM micrograph proved the existence of small cracks on the film surface, EDS confirmed the composition percentage ratio of Sn and O2 and no trace of impurities could be detected. The spectrophotometer UV-Visible confirms that it is possible to get good transparent SnO2 films with a transmission of 80 to 90% in the visible. The values of optical band gaps vary between 3.6 and 4.0 eV depending on the spraying solution concentration. © 2019 Trans Tech Publications Ltd, Switzerland.