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Synthesis, structure and thermoelectric properties of holmium-doped nanomaterials based on bismuth telluride
https://doi.org/10.15518/isjaee.2023.05.021-031
Abstract
Powdered thermoelectric materials Bi2-xHoxTe2.7Se0.3 (x = 0; 0.001; 0.0025; 0.005) were obtained by the method of solvothermal synthesis. The possibility of obtaining nanomaterials based on holmium-doped bismuth telluride is shown. The influence of holmium concentration on the parameters of the crystal lattice, morphology and average size of the synthesized particles were studied. Bulk materials Bi2-xHoxTe2.7Se0.3 were obtained by spark plasma sintering. All obtained samples were textured, the crystallographic axis of the texture (0 0 l) is directed parallel to the direction of pressure application during compaction. The development of the texture is confirmed by scanning electron microscopy and XRD analysis. The grains in the textured samples form an ordered lamellar structure, and the lamellar sheets lie in a plane perpendicular to the direction of pressing. An increase in the concentration of holmium leads to an increase in the degree of texturing. The thermoelectric properties of bulk materials Bi2-xHoxTe2.7Se0.3.
About the Authors
M. N. Yapryntsev
Belgorod National Research University
Russian Federation
Russian Federation
Maksim Yapryntsev - Candidate of Physical and Mathematical Sciences, Associate Professor of the Department of Materials Science and Nanotechnology
ul. Pobedy, d. 85, g. Belgorod, 308015
O. N. Ivanov
Belgorod National Research University
Russian Federation
Russian Federation
Oleg Ivanov - Doctor of Physical and Mathematical Sciences, Professor
of the Department of Materials Science and Nanotechnology
ul. Pobedy, d. 85, g. Belgorod, 308015
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Review
For citations:
Yapryntsev M.N., Ivanov O.N. Synthesis, structure and thermoelectric properties of holmium-doped nanomaterials based on bismuth telluride. Alternative Energy and Ecology (ISJAEE). 2023;(5):21-31. (In Russ.) https://doi.org/10.15518/isjaee.2023.05.021-031
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