Annealing effecting on some properties of CTAB modified Tellurium dioxide thin films by hydrothermal Technique
Journal Title: International Journal of Modern Research In Engineering & Management. - Year 2019, Vol 2, Issue 7
Abstract
modified with hexadecyl trimethyl ammonium bromide (CTAB), the investigation of nanostructural and optical properties of TeO2 thin films was studied. The films are performed on glass substrates, the concentration of CTAB and hydrothermal treatment temperature played crucial roles and used as the parameters to control morphology by hydrothermal technique. At room temperature and annealing by tubular quartz furnace at temperature (473,673) K for 8 hours with air. XRD measurements showed that the structure for all samples is polycrystalline with a Tetragonal nanostructure. Surface morphology was studied using field emission scanning electron microscopy FESEM, Energy‐dispersive X‐ray spectroscopy, and atomic force microscopy AFM. After annealing, the roughness of the surface and the mean grain size were increased. Optical properties as a function to wavelength in the range (300-1100 nm) have been studied. Absorption spectra of Teo2 thin films showed that the absorption coefficient decreases with increasing annealing temperature. Direct energy gap for a Teo2 thin film was increased with increasing temperature for all samples due to crystal growth
Authors and Affiliations
Sozan A. Hassan
Keywords
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