Abstract
A procedure is developed for the preparation of Bi0.5Sb1.5Te3-4 mol % Bi2Se3 single crystals with a graded longitudinal carrier concentration profile. The thermoelectric power gradient in the crystals is 40–70 µV/K over a distance of 1–1.5 mm. The shape of the growth interface is determined. Graded legs are produced that have optimal carrier concentrations for different working temperatures of thermoelectric coolers (the thermoelectric power at the hot end is from 220 to 270 µV/K). Regions with low carrier concentration (α > 220 µV/K) are shown to contain Te-based eutectic precipitates along the cleavage plane.
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Translated from Neorganicheskie Materialy, Vol. 41, No. 10, 2005, pp. 1200–1205.
Original Russian Text Copyright © 2005 by Ivanova, Granatkina, Petrova, Korzhuev.
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Ivanova, L.D., Granatkina, Y.V., Petrova, L.I. et al. Bi0.5Sb1.5Te3-4 mol % Bi2Se3 Single Crystals with Graded Carrier Concentration. Inorg Mater 41, 1055–1060 (2005). https://doi.org/10.1007/s10789-005-0260-4
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DOI: https://doi.org/10.1007/s10789-005-0260-4