Crystal Research and Technology
Cryst. Res. Technol. 38, 598 (2003) - Abstract -

Solid–vapor equilibrium in quasi-binary CdTe–ZnTe

J. H. Greenberg, V. N. Guskov*, and A. S. Alikhanyan*

Department of Inorganic Chemistry, Hebrew University, 91904 Jerusalem, Israel
*Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky pr.31, Moscow, Russia

Keywords semiconductors, cadmium telluride, zinc telluride, phase equilibrium
PACS 81.05.Dz, 64.70.Hz
DOI 10.1002/crat.200310073

Total vapor pressure measurement and Knudsen cell mass spectrometry have been applied to study sublimation processes in the quasi-binary system CdTe–ZnTe at temperatures 780 K – 1350 K. This system was shown to correspond to the vapor pressure minimum in the pressure–temperature–composition (P–T–X) phase diagram of the ternary system Cd–Zn–Te. The shape of the solidus and vaporus surfaces was traced via experimental isothermal and isobaric sections of the Pmin area up to the near-melting region. Relationship between the composition of the crystal, vapor pressure and composition of the vapor was determined in the whole concentration range. At temperatures above 780 K CdTe–ZnTe was found to be a continuous solid solution with incongruent sublimation, whereas at T = 780 K a tendency to phase separation was observed.



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