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Estimating the Switching phenomenon for Se 98 Te 2 and Se 96 Te 2 X 2 (X=Zn or Cd) Chalcogenide glasses.

Journal of Non-Crystalline Solids, ISSN: 0022-3093, Vol: 584, Page: 121514
2022
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The switching behavior was investigated for Se 98 Te 2 and Se 96 Te 2 X 2 (X= Zn or Cd) Chalcogenide glasses in thin film form. The thermal evaporation process was used for the preparation of the film samples. I−V curves were investigated in the thickness range (200-670 nm) and temperature range (293-318 K). The I−V curves show a memory switch. The values of threshold voltage (V th ) found to decrease with the addition of Zn and Cd to Se 98 Te 2 respectively. Also, the threshold voltage ( Vth ) values decrease exponentially with increasing temperature and increase with thickness. The ratio between the threshold voltage activation energy Δεth and dc electrical activation energy ΔEσ for the studied compositions suggests the explanation of the switching process by the electrothermal model. The threshold electric field Eth values were obtained and show an inverse relation with temperature for our studied system. The effect of Cd and Zn addition to Se 98 Te 2 on the obtained parameters was also explained.

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