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The research paper reveals study of influence of annealing temperature on optical properties of Tin Oxide (SnO2) thin films prepared by Thermal Evaporation process. Tin Oxide thin films were synthesized on glass substrate (corning 7059) by Thermal Evaporation unit (model 12A 4D) and annealed at different temperatures (100c, 200c, 300c & 400c) for different durations (1hr, 2hr, 3hr). Optical characteristics were analyzed from the transmission spectrum data which was obtained from UV/VIS spectrophotometer (model ELICO-159). From the study of optical properties it was observed that all the samples exhibited maximum transmittance above 70%, average transmittance was maximum at 100c for each annealing time. Refractive index of the films was varied with respect to annealing time & temperature, it was maximum 2.26 at 200c annealed for 1 hr and minimum with value 1.93 at 100c for 3hr annealing. The energy gap was calculated as maximum at 300c temperature for all annealing durations. The optical absorption coefficient  was found in the order of 10cm to 10cm.

The Influence of Annealing Temperature on Optical Properties of Tin Oxide (SnO2) Thin Films Prepared by Thermal Evaporation Process