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Effect of copper on DC and AC conductivities of (As2Se3)–(AsI3) glassy semiconductors

“…Thus, great variations of important glass characteristics appear as a result of introducing Cu, Ag or Cd atoms into the chalcogenide systems. It has been found that the presence of Cu in amorphous arsenic-selenides leads to the increase of density, microhardness [4], softening temperature and thermal stability [5,6], refractive index and to a decrease of the optical band gap [7], activation energy of electrical conductivity [8], as well as changing of the electrical switching properties of the glass to a definite direction [9]. In addition to the known good mechanical, thermal, magnetic and electrical properties, some investigations have been focused on the elucidation of the changes in optical features of copper-containing chalcogenide glasses.…”

Refractive-index dispersion of glassy semiconductors in the pseudo-binary As2Se3–SbSI system

“…Namely, the introduction of antimony, sulphur and iodine into As 2 Se 3 makes the system structure much more complex and leads to a gradual replacement of some structurral units by some others. High-temperature X-ray diffraction analysis indicates the probable presence of the selenides of arsenic and antimony (As 2 Se 3 , AsSe, Sb 2 Se 3 ) in the composition with x = 20 and 30 at.%, along with the appearance and domination of antimony-sulphoiodide SbSI and antimony sulphide Sb 2 S 3 in the compositions with x P 50 at.% [10]. These changes in the composition and new atoms playing the role of cations change the values of effective cation coordination number N c , and thus the dispersion parameter E d , too.…”

Effect of arsenic atom substitute with antimony on crystallization processes and thermal stability of the (Sb, As)-S-I system

“…An analogous analysis was also performed for the other structural units Sb 2 S 3 , whose formation in this matrix could be expected on the basis of the previous study of the analogous systems [18]. Results of this analysis are presented in Figs.…”

“…T 0 is the initial experiment temperature. Graphical presentations of these analyses of the processes which, according to previous investigations [18], could be related to the crystallization of the structural units SbSI are given in Figs. 7-10.…”