Patent ID: 7537659

Claim:
A method for obtaining a Cd 1-x Zn x Te single crystal, in which x is a value from 0 to 0.2, which comprises the following steps: a) obtaining a source material of Cd 1-x Zn x Te having a composition close to that corresponding to congruent sublimation, either by crystallization of liquid Cd 1-x Zn x Te using Bridgman's horizontal technique under partial cadmium pressure to adjust stoichiometry, or by annealing a Cd 1-x Zn x Te material pre-synthesized at 800-900° C. in an ampoule with end capillary maintained at ambient temperature, b) obtaining a polycrystalline block of Cd 1-x Zn x Te in which x lies between 0 and 0.2 by sublimation of a stoichiometric solid source material of Cd 1-x Zn x Te in a sealed chamber at a temperature of the chamber zone in which the source material is located at between 900° C. and 1000° C., the difference in temperature ΔT between the zone of the source material and the zone of crystal deposit lying between 30° and 50° C. c) obtaining a Cd 1-x Zn x Te single crystal by re-crystallizing the polycrystalline block obtaining at step b), by annealing under isothermal conditions under partial Cd pressure of between 4·10 5 and 6·10 5 Pa and at a temperature of between 1000° C. and 1060° C. for a time of between 50 and 200 hours.