Abstract:
In the paper the thermodynamic stability and variability of the internal energy of continuous substitution solid solutions based on the CuInxGa1–xS2 chalcopyrite lattice (CIGS) in a state of the nanoelectromechanical system (NEMS) are studied. These substances are the most effective materials for phototransformation processes. It is known that maximum efficiency reached using a photoconverter based on CuInxGa1–xS2 composition amounted up to 21 %, while the same value for photoconverter based on silicon could reach only 15 %, which underlines the relevance of studies of the subject compositions. The equilibrium bond lengths and binding energy values are presented. The change to the internal energy at different temperatures and the change to distribution functions of atoms over radial pairs in a stable system of nanolayers are shown. It was revealed that changing of indium atoms concentration in the system causes non-linear relative changes to the parameters of stable CIGS NEMS nanolayers. It was shown that given behavior is the consequence of a significant difference in both In–S and Ga–S bond lengths and binding energy values in the first coordination area of sulphur.
