Thermodynamic description of the Hg–Te binary system

The (Hg,Cd)Te is a traditional material for infrared optoelectronic devices. It is possible to tune its energy gap practically to any infrared wavelength by varying CdTe mole fraction. The (Hg,Cd) Te is using as an epitaxial layers which have been grown on CdTe substrate from pseudobinary Hg-rich and Te-rich solutions by PLE. The knowledge of the phase diagram of Hg–Cd–Te system as well as of the Cd–Hg, Hg–Te and Cd–Te systems is essential for understanding and planning technological processes. In this work the binary system Hg–Te has been modeled using ionic liquid, associate liquid and subregular models. Results of calculations were compared and discussed.