Abstract
AbstractThe possibility of growing shaped AIVBVI crystals from the vapour phase by the open tube technique was investigated on PbTe. The thermodynamic conditions to reproducible prepare several habits of PbTe crystals — whiskers, tetrahedral prisms and cubes, platelets (a), dendrites, cubic and octahedral skeletons (b) as well as their properties were examined. The crystalline habits (a) are characterized by perfectly mirror‐like (100) surfaces and low dislocation densities. The type and concentration of charge carriers are mainly determined by the vapour composition within the crystallization zone and very from n = 3 × 1017 to p = 1 × 1019cm−3. These properties are the reason of the interest in shaped PbTe crystals for the aim of IR optoelectronic devices.
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