Effect of substrate surface on the wide bandgap SnO2 thin films grown by spin coating

Tin (IV) oxide (SnO2) sols have been synthesized from SnCl2·2H2O precursor solution by applying two different processing conditions. The prepared were then deposited on UV-Ozone-treated quartz and soda lime glass (SLG) substrates spin coating. as-synthesized film was soft baked at about 100 °C for 10 min. This process repeated 5 times to get a compact film, followed air annealing 250 2 h. pristine annealed films characterized UV–Vis–NIR spectroscopy, Grazing Incident X-Ray Diffraction (GIXRD), Field Emission Scanning Electron Microscope (FESEM). effect of the substrate surface investigated measuring contact angles with De-Ionized (DI) water. UV-Ozone treatment provides cleaner grow homogeneous film. electrical resistivity thin carried out four-point collinear probe employing current reversal technique found in range ~ × 103 3 Ω·cm. Film thickness 137–285 nm, measured stylus profilometer. transmission data revealed that all thin-film samples showed maximum (82–89) % visible range. optical bandgap estimated be 3.75–4.00 eV 3.78–4.35 grown SLG substrates, respectively.