Thermodynamics and Crystallization Kinetics of Solid Solutions GaS_xSe_1 – x (0 ≤ х ≤ 1)

Abstract—The results on the study of phase equilibria and crystallization of GaS_xSe_1 – x (0 ≤ х ≤ 1) solid solution in the GaS–GaSe system are presented. Using DTA, XRD, and the approximation of regular solutions, the physico-chemical and thermodynamic laws of the T – x phase diagram of GaS–GaSe, where a continuous series of solid solutions are formed, are determined. The temperature–concentration dependences of the change in the Gibbs free energy of the system are calculated. For nucleation and crystallization of GaS_xSe_1 – x solid solutions, a model based on a Fokker–Planck type equation in the size space has been tested.