Effect of Post-Oxidation on SnO2 Thin Films

Abstract

An investigation which include synthesis of SnO2 thin film by depositing ontoglass substrates at room temperature using thermal evaporation technique. Thefilms were post-annealing in furnace tube at 250 oC temperature for different time(10, 20, 30 and 40 minutes). The films were characterized by AFM microscopy,FTIR and optical absorption spectrophotometer. The grain size was observed toincrease with increase the annealing duration. Absorbance spectra were taken toexamine the optical properties and band gap energy was observed to decrease withincrease the annealing duration. The effect of annealing time on the optical andmorphological properties of films were studied and discussed