Laser radiation effects on optical and structural properties of nanostructure CdSe thin film |
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Authors: | Ausama I Khudiar Zahid H Khan |
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Institution: | 1. Department of Physics , Jamia Millia Islamia (Central University) , New Delhi, 110025, India;2. Center of Laser and Optoelectronics, Ministry of Science and Technology , Baghdad, Iraq;3. Department of Physics , Jamia Millia Islamia (Central University) , New Delhi, 110025, India |
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Abstract: | Cadmium selenide (CdSe) thin films were deposited on a glass substrate using the thermal evaporation method at room temperature. The changes in the optical properties (optical band gap and absorption coefficient) after irradiation by TEA N2 laser at different energies were measured in the wavelength range 190–800 nm using a spectrophotometer. It was found that the optical band gap is decreased after irradiating the thin films. The samples were characterized using X-ray diffraction (XRD), and the grain size of the CdSe thin film was calculated from XRD data, which was found to be 41.47 nm as-deposited. It was also found that grain size increases with laser exposure. The samples were characterized using a scanning electron microscope and it was found that big clusters were formed after irradiation by TEA N2 laser. |
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Keywords: | cadmium selenide thin film laser irradiation optical properties structural properties |
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