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Growth, Structural, Optical, Morphological Studies of SnO2 Thin Films Prepared by Spray Pyrolysis Technique

Muhamed Sajeer. K, Muhammed Rafi. N

Tin dioxide (SnO2) thin films have been deposited using chemical spray pyrolysis on non- conducting glass substrates at temperature 400oC with different solution concentration from 0.2M to 0.5M.The structural , optical and surface morphological properties of deposited films were studied using scanning electron microscope (SEM), Xray diffraction (XRD), UV-Vis spectrometry techniques. SEM studies reveal that SnO 2 films exhibited the irregular grains over the surface and the amount of grain increases with increase in the solution concentration. The XRD studies reveal that films are crystalline and structure of tetragonal phase. Micro structural parameters such as crystallite size, micro strain, and dislocation density are calculated and found to depend on solution concentrations. The optical band gap of SnO 2 thin films is calculated using transmittance and reflectance data using UV-Vis spectrometry. From the data, energy band gap lies between 2.72 eV to 2.95eV. And refractive index of the thin film is decreases with decrease in solution concentration