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Effect of thermal annealing on structural and optical properties of In doped Ge-Se-Te chalcogenide thin films

Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Thin films of Ge10–xSe60Te30Inx (x = 0, 2, 4 and 6) were developed by thermal evaporation technique. The annealing effect on the structural properties of Ge10–xSe60Te30Inx (x = 0, 2, 4 and 6) films has been studied by X-ray diffraction (XRD). The XRD results indicate amorphous nature of the as-prepared films whereas crystalline phases in annealed films were identified. Structural parameters such as average crystallite size, strain, and dislocation were determined for different annealing temperatures. Effect of annealing on optical constants of prepared films has been explored using UV-Vis spectrophotometer in the wavelength range of 400 nm to 1000 nm. Various optical constants were determined depending on annealing temperature. It has been noticed that the film transparency and optical bandgap Eg have been reduced whereas the absorption coefficient α and extinction coefficient k increased with increasing annealing temperature. It was found that the prepared samples obey the allowed direct transition. The reduction in optical bandgap with annealing temperature has been described by Mott and Davis model. Due to annealing dependence of the optical parameters, the investigated material could be utilized for phase change memory devices.
Wydawca
Rocznik
Strony
554--562
Opis fizyczny
Bibliogr. 44 poz., tab., rys.
Twórcy
  • Amorphous Semiconductor Research Lab, Department of Applied Science, Madan Mohan Malaviya University of Technology, Gorakhpur 273010, India
  • Department of Physics, Punjab University, Chandigarh, India
  • Amorphous Semiconductor Research Lab, Department of Applied Science, Madan Mohan Malaviya University of Technology, Gorakhpur 273010, India
Bibliografia
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Uwagi
Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-309f710d-50be-4c85-b3d5-5175ba92ec4f
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