Dispersion of refractive index of the amorphous system Cu x (AS38.5Se54I7.5)100− x

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

“…With the temperature increase, the frequency of the transition from a weak to marked dependence of lnσ tot (ω) (arrows in Figs. [6][7][8][9] is shifted to the range of higher frequencies. The AC component σ AC (ω,T) of total measured conductivity is found to have a strong frequency dependence in accordance with the relation σ AC (ω,T) = Aω s .…”

“…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.…”

Influence of copper on hardness of amorphous As–Se–I thin films

“…12,23 Different behaviours of some other thin film properties of thin films with copper compared with the bulks of the same compositions are previously reported. 24 This indicates that during the preparation of the bulk samples into thin film form, despite carefully conducted process, some structural changes occurred. Considering the complexity of the investigated system and delicacy of the thin film preparation process, structural differences between the bulk and the thin film form are expected.…”

Refractive-index dispersion and the optical-absorption edge of wedge-shaped thin films of metal - chalcogenide glasses

“…It can be supposed that the Cu atoms interacting with Se atoms produce an additional number of weak As-Se bonds and weak As 'dangling' bonds, which are responsible for the process of optical recording. In assessing the possibility of using the chalcogenide amorphous semiconductors for this very useful purpose, a knowledge of the spectral dependence of their optical constants is, indeed, of special importance [7].…”