Structural, Morphology and Some Optical Properties of Chalcogenide Ga<sub>80-x</sub>Se<sub>x</sub>Te<sub>20</sub> (Where x = 10%, 15% and 20%) Glassy Material
- 1 Department of Physics, Faculty of Science, Taibah University, Madinah, Saudi Arabia
- 2 Department of Physics, Faculty of Science, Taibah University, Madinah, Saudi Arabia
Abstract
Ga 80-x Se x Te 20 amorphous system was prepared by conventional technique. Structural, morphology and optical properties have been investigated. X-ray diffraction (XRD) patterns reveal the non-crystalline nature of the prepared sample. Differential thermal analysis (DTA) traces indicate the presen ce glass transition temper a ture T g for all samples below 500 ° C. Addition T g values increases by increas ing Se content. Energy dispersive X-ray spectroscopy (EDX) data shows good agreement with actual composition. Moreover , surface characterization was achieved by scanning electron microscope (SEM) . The patterns confirmed the non-crystalline nature. In order to analyze the data , the cohesive energy C.E w as calculated by all three composition optical properties that have been investigated in the wavelength range 500 - 2500 nm. Reflectivity R and transmitivity T spectrum were used to estimate the band gap energy using UV-Visible absorption spectrum. It is worthy mention that the optical band gap follows the T g and cohesive energy behavior, where it increases by increasing Se content.
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