“Variation in the structure and optical properties of CdO thin film with temperature”
- Author Yash Ravindra Mankar
- Co-Author V Kumar
- DOI https://ww
- Country : India
- Subject : Physics
Keywords : CdO thin film, CBDM, annealing, structure and optical properties.
Abstract
CdO thin film has been deposited by using chemical bath deposition method on the glass substrate. The effect of temperature of annealing (573, 623 and 673 K) on the structural and optical properties of the films has been discussed. The structure of crystal is studied by using X-ray diffraction technique. The nature of annealed CdO films is polycrystalline with cubic structure. It is having a preferential orientation along (111) plane. The analysis of X-ray diffraction technique shows that the intensities of peaks of the crystalline phase have raised by increasing of annealing temperature. The parameters of structure for the CdO thin films as the grain size, strain, dislocation density, and texture coefficient were calculated and discussed. The particle size of the preferential orientation at annealing temperature 623 K is 16.95 nm while that for the annealing temperature 18.24 nm is 673 K. The study of optical properties of CdO thin films by using the technique of ultraviolet-visible spectrophotometer indicates blue shift in the energy band gap which is the clear indication of quantum confinement. It is found that the band gap energy decreases by increasing the annealing temperature. It means that the band gap energy is inversely proportional to the annealing temperature.
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