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Optical and other physical characteristics of amorphousSe–Te–Sn alloys

Optical and other physical characteristics of amorphousSe–Te–Sn alloys
Optical and other physical characteristics of amorphousSe–Te–Sn alloys
The Effect of Sn addition in the structural and optical properties of Se–Te chalcogenidealloy at the expense of the Se content has been studied. Stoichiometric bulk ingotmaterials of the Se90xTe10Snx(x¼0, 2.5, 5 and 7.5 at%) were prepared by a melt-quenchtechnique. X-ray diffraction (XRD) studies indicated that the investigated alloys confirmedits amorphous nature. These results were confirmed by scanning electron microscopy(SEM) investigations and correlated to the rigidity percolation threshold of the lattice.Stoichiometric thermally evaporated thin film of the obtained compositions were carefullycharacterized to establish the interdependence between their chemical composition andsome physical parameters, such as the average heat of atomization (Hs), the cohesiveenergy CE, the average coordination number〈Z〉and the optical band gap (Eg). It has beenfound that all the parameters varied linearly when Sn content was increased. Thevariation in the optical band gap (Eg) with Sn addition was discussed in terms of thewidth of localized states (Ee) and a chemical bond approach model (CBA).
156-161
Abdelazim, Nema
2ac8bd5e-cbf1-4d9a-adcb-65dedf244b9b
Dabban, M.A
b0f7430e-7965-4d48-8f97-b1661cf393b7
Abdel-Rahim, M.A
00eb2998-9b28-4bc7-83d1-5c70c3b64472
Abu-Sehly, A.A.
8f111505-5075-4776-9853-45d84fab2dc1
Abdelazim, Nema
2ac8bd5e-cbf1-4d9a-adcb-65dedf244b9b
Dabban, M.A
b0f7430e-7965-4d48-8f97-b1661cf393b7
Abdel-Rahim, M.A
00eb2998-9b28-4bc7-83d1-5c70c3b64472
Abu-Sehly, A.A.
8f111505-5075-4776-9853-45d84fab2dc1

Abdelazim, Nema, Dabban, M.A, Abdel-Rahim, M.A and Abu-Sehly, A.A. (2015) Optical and other physical characteristics of amorphousSe–Te–Sn alloys. Journal of Materials Science in Semiconductor Processing, 39, 156-161. (doi:10.1016/j.mssp.2015.05.005).

Record type: Article

Abstract

The Effect of Sn addition in the structural and optical properties of Se–Te chalcogenidealloy at the expense of the Se content has been studied. Stoichiometric bulk ingotmaterials of the Se90xTe10Snx(x¼0, 2.5, 5 and 7.5 at%) were prepared by a melt-quenchtechnique. X-ray diffraction (XRD) studies indicated that the investigated alloys confirmedits amorphous nature. These results were confirmed by scanning electron microscopy(SEM) investigations and correlated to the rigidity percolation threshold of the lattice.Stoichiometric thermally evaporated thin film of the obtained compositions were carefullycharacterized to establish the interdependence between their chemical composition andsome physical parameters, such as the average heat of atomization (Hs), the cohesiveenergy CE, the average coordination number〈Z〉and the optical band gap (Eg). It has beenfound that all the parameters varied linearly when Sn content was increased. Thevariation in the optical band gap (Eg) with Sn addition was discussed in terms of thewidth of localized states (Ee) and a chemical bond approach model (CBA).

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Published date: 19 May 2015

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Local EPrints ID: 452031
URI: http://eprints.soton.ac.uk/id/eprint/452031
PURE UUID: 4f7ea808-3dd0-4a12-aa85-8f2be200b19f

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Date deposited: 09 Nov 2021 17:32
Last modified: 09 Nov 2021 17:32

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Contributors

Author: Nema Abdelazim
Author: M.A Dabban
Author: M.A Abdel-Rahim
Author: A.A. Abu-Sehly

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