Abstract
In this paper, cadmium stannate (Cd2SnO4) thin films at four different molar concentrations (1:1, 2:1, 3:1, and 4:1) were prepared at a temperature of (400 oC) using a chemical spray pyrolysis technique and have a thickness of about 400±10 nm. XRD patterns of the prepared thin films showed that the thin films have both a polycrystalline and a cubic structure. FE-SEM and AFM were used to investigate the surface morphology of Cd2SnO4 thin films. The measurement of absorbance and transmittance spectra for films in the range of 300–900 nm was part of the optical properties research. The effect of various molar concentrations of these films on transmittance was investigated, and the results revealed a decrease in transmittance. The allowed direct electronic transmission optical energy gap was calculated, and it was discovered that it decreases as the molar concentrations increase, with a value ranging between (2.61-2.91) eV.
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