• Archana Srivastava

Chalcogenide glasses are interesting materials due to their infrared transmitting properties and photo-induced effects exhibited by them. Bulk samples of Se80In5Te9Sb3 alloy was prepared by melt quenching technique. The glassy nature of was verified by non-isothermal DSC measurements. Thin films of Se80In5Te9Sb3 alloy with thickness 400 nm were deposited on glass substrate by thermal evaporation technique. The photo-induced crystallization in Se80In5Te9Sb3 thin films was done by exposing to light (using 2000 W tungsten lamp) at various illumination times. In the illumination process the ambient temperature was fixed at 375 K which is carefully chosen from DSC thermograms. X-ray diffraction, Field Emission Scanning Electron Microscope (FESEM) and optical measurements were used to characterize as-prepared and photo-induced thin films. The photo-induced crystallization is found to be associated with the change in structure. The detailed study of optical absorption data indicates that the optical absorption is indirect. The observed optical band gap becomes lesser while the absorption and the extinction coefficients tend to increase with increasing illumination time. The lowering of optical band gap is described on the process of photoinduced crystallization.

Chalcogenide Glasses, Thin Films, X-ray diffraction, Photo-induced Crystallization, Optical Band Gap

"Photo-induced Amorphous to Crystalline Phase Transformation in Se80In5Te9Sb3 Chalcogenide Thin Films ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.11, Issue 2, page no.h28-h35, February-2024, Available :http://www.jetir.org/papers/JETIR2402731.pdf

"Photo-induced Amorphous to Crystalline Phase Transformation in Se80In5Te9Sb3 Chalcogenide Thin Films ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.11, Issue 2, page no. pph28-h35, February-2024, Available at : http://www.jetir.org/papers/JETIR2402731.pdf