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. This favorable combination of thermoelectric properties yields a peak dimensionless figure of merit ZT of 0.70 at 425 K for x = 0.02 in the direction perpendicular to the pressing direction.
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6 December 2021
Research Article|
December 08 2021
High temperature thermoelectric properties of the tetradymite Bi2−xPbxTe2Se (0 ≤ x ≤ 0.03) Available to Purchase
Special Collection:
Thermoelectric Materials Science and Technology Towards Applications
Adèle Léon
;
Adèle Léon
1
Institut Jean Lamour, UMR 7198 CNRS–Université de Lorraine
, Campus ARTEM, 2 allée André Guinier, BP 50840, 54011 Nancy, France
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Shantanu Misra
;
Shantanu Misra
1
Institut Jean Lamour, UMR 7198 CNRS–Université de Lorraine
, Campus ARTEM, 2 allée André Guinier, BP 50840, 54011 Nancy, France
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Petr Levinský
;
Petr Levinský
2
FZU–Institute of Physics of the Czech Academy of Sciences
, Cukrovarnická 10/112, 162 00 Prague 6, Czech Republic
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Jiří Hejtmánek
;
Jiří Hejtmánek
2
FZU–Institute of Physics of the Czech Academy of Sciences
, Cukrovarnická 10/112, 162 00 Prague 6, Czech Republic
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Bartlomiej Wiendlocha
;
Bartlomiej Wiendlocha
3
Faculty of Physics and Applied Computer Science, AGH University of Science and Technology
, Al. Mickiewicza 30, 30-059 Krakow, Poland
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Bertrand Lenoir
;
Bertrand Lenoir
a)
1
Institut Jean Lamour, UMR 7198 CNRS–Université de Lorraine
, Campus ARTEM, 2 allée André Guinier, BP 50840, 54011 Nancy, France
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Christophe Candolfi
Christophe Candolfi
a)
1
Institut Jean Lamour, UMR 7198 CNRS–Université de Lorraine
, Campus ARTEM, 2 allée André Guinier, BP 50840, 54011 Nancy, France
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Adèle Léon
1
Shantanu Misra
1
Petr Levinský
2
Jiří Hejtmánek
2
Bartlomiej Wiendlocha
3
Bertrand Lenoir
1,a)
Christophe Candolfi
1,a)
1
Institut Jean Lamour, UMR 7198 CNRS–Université de Lorraine
, Campus ARTEM, 2 allée André Guinier, BP 50840, 54011 Nancy, France
2
FZU–Institute of Physics of the Czech Academy of Sciences
, Cukrovarnická 10/112, 162 00 Prague 6, Czech Republic
3
Faculty of Physics and Applied Computer Science, AGH University of Science and Technology
, Al. Mickiewicza 30, 30-059 Krakow, Poland
Note: This paper is part of the APL Special Collection on Thermoelectric Materials Science and Technology Towards Applications.
Appl. Phys. Lett. 119, 232103 (2021)
Article history
Received:
October 31 2021
Accepted:
November 24 2021
Citation
Adèle Léon, Shantanu Misra, Petr Levinský, Jiří Hejtmánek, Bartlomiej Wiendlocha, Bertrand Lenoir, Christophe Candolfi; High temperature thermoelectric properties of the tetradymite Bi2−xPbxTe2Se (0 ≤ x ≤ 0.03). Appl. Phys. Lett. 6 December 2021; 119 (23): 232103. https://doi.org/10.1063/5.0077166
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