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High temperature thermoelectric properties of the tetradymite Bi.sub.2-x./sub.Pb.sub.x./sub.Te.sub.2./sub.Se (0 ≤ x ≤ 0.03)
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SYSNO ASEP 0549432 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title High temperature thermoelectric properties of the tetradymite Bi2-xPbxTe2Se (0 ≤ x ≤ 0.03) Author(s) Léon, A. (FR)
Misra, S. (FR)
Levinský, Petr (FZU-D) RID, ORCID
Hejtmánek, Jiří (FZU-D) RID, ORCID
Wiendlocha, B. (PL)
Lenoir, B. (FR)
Candolfi, C. (FR)Number of authors 7 Article number 232103 Source Title Applied Physics Letters. - : AIP Publishing - ISSN 0003-6951
Roč. 119, č. 23 (2021)Number of pages 6 s. Language eng - English Country US - United States Keywords thermoelectrics ; materials synthesis and characterization ; semiconductor doping ; carrier concentration Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects GA18-12761S GA ČR - Czech Science Foundation (CSF) LM2018096 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support FZU-D - RVO:68378271 UT WOS 000729403700001 EID SCOPUS 85121119126 DOI 10.1063/5.0077166 Annotation We report on the synthesis, characterizations, and high-temperature thermoelectric properties of polycrystalline samples of Bi2-xPbxTe2Se for 0 ≤ x ≤ 0.03. Powder x-ray diffraction and scanning electron microscopy confirm the successful insertion of Pb into the hexagonal unit cell of the tetradymite Bi2Te2Se. Pb acts as an acceptor-like impurity, gradually shifting the lightly doped, n-type electronic properties of Bi2Te2Se toward heavily doped, p-type properties in Pb-containing samples, which is additionally confirmed by electronic structure calculations. The increased degenerate character results in high power factors while maintaining low thermal conductivity values. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2022 Electronic address https://doi.org/10.1063/5.0077166
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