Open Access

ARTICLE

Glass transition and crystallization of Se₉₅Te₅ chalcogenide glassy semiconductor

S. U. Atayeva^a,b, A. I. Isayev^a, S. I. Mekhtiyeva^a, S. N. Garibova^a,c,*, R. I. Alekberov^a,d, F. N. Mammadov^e

a Institute of Physics, Ministry of Science and Education Republic of Azerbaijan, Baku, 1143, Azerbaijan
b Department of General and Applied Physics, National Aviation Academy, Baku, 1045, Azerbaijan
c Department of Physics and Electronics, Khazar University, Baku, 1096, Azerbaijan
d Azerbaijan State Economic University (UNEC), Baku, 1001, Azerbaijan
e Socar Midstream Operations LLC, Baku, Azerbaijan

* Corresponding Author:

Chalcogenide Letters 2024, 21(4), 355-363. https://doi.org/10.15251/CL.2024.214.355

Received 22 February 2024; Accepted 26 April 2024;

Abstract

The study is dedicated to the investigation of thermo-physical characteristics of Se₉₅Te₅ chalcogenide glassy semiconductor during its glass formation and crystallization processes, employing various scanning rates of 5, 10, 15 and 20 K/min in non-isothermal modes through DSC measurement. Analysis of the structural relaxation kinetics involves the Kissinger’s, Augis and Bennett's, as well as Matusita’s approaches. Experimental data yield contains the determination of crucial parameters such as glass transition (T_g), crystallization(T_c), and melting temperatures alongside factors like reduced temperature of glass transition (T_rg), Hruby’s parameter (K_gl), fragility index (F_i), Avrami exponents (n, m), glass transition (140.24 kJ/mol) and crystallization (Ec = 95.11 kJ/mol) energies, respectively. The results confirm that Se₉₅Te₅ chalcogenide system as an efficient glass former. Matusita’s method reveals that the crystallization mechanism (n = 2.51, m = 1.9) corresponds to volumetric nucleation with two-dimensional growth.

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Keywords

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