Heat treatment effect on the structural and optical properties of Ga2Se3-Ga2S3 thin films |
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| Authors: | H. S. Soliman S. B. Youssef M. M. El-Nahass A. A. El-Shazly |
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| Affiliation: | (1) Physics Department, Faculty of Education, Ain Shams University, Cairo, Egypt |
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| Abstract: | The structural properties of the 50 mol% Ga2Se3-50 mol% Ga2S3 system in thin-film form were studied using an X-ray diffraction technique. As-deposited films had an amorphous nature, whereas films heat treated for 2 h at 400 °C in a vacuum of 10–2 Pa had a single-phase (cubic) polycrystalline nature with lattice constanta=0.532 nm. The optical properties of Ga2Se3-Ga2S3 thin films as-deposited and as-heat treated were also studied. It was found that heat treatment strongly affects the optical constants as well as the energy gap, which can be attributed to compositional as well as structural changes. |
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