Effect of film thickness on the structural and optical properties of SnO 2 thin films prepared by ultrasonic spray pyrolysis

摘要

In this context, we have deposited using spray prolysis technique on cleaned glass substrates a thin SnO₂ layers using different deposition times from 3 min to 9 min and tin chloride was used as starting solution with a molarity of 0.1 mol/l at temperature equal 350 °C. The main results of the deposition time effect on the structural and optical properties are: Structural analysis of SnO₂ film deposited at low deposition time revealed the presence of SnO phase. Moreover, increasing the deposition time, we noted the formation of the SnO₂ orientation phase (111) with the absence of the SnO phase. The obtained films show good optical propertiest with an average transparency value greater than 60% in the visible region and the gap values varies between 3.98 to 3.5 eV.