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  Thermoelectric characterization of the clathrate-I solid solution Ba8-δAuxGe46-x

Baitinger, M., Nguyen, H. D., Candolfi, C., Antonyshyn, I., Meier-Kirchner, K., Veremchuk, I., et al. (2021). Thermoelectric characterization of the clathrate-I solid solution Ba8-δAuxGe46-x. Applied Physics Letters, 119(6): 063902, pp. 1-6. doi:10.1063/5.0059166.

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Baitinger, Michael1, Autor           
Nguyen, Hong Duong2, Autor
Candolfi, Christophe2, Autor
Antonyshyn, Iryna3, Autor           
Meier-Kirchner, Katrin4, Autor           
Veremchuk, Igor2, Autor
Razinkov, Valeriy2, Autor
Havryluk, Mykola2, Autor
Cardoso-Gil, Raul5, Autor           
Burkhardt, Ulrich6, Autor           
Böhme, Bodo7, Autor           
Anatychuk, Lukyan2, Autor
Grin, Yuri8, Autor           
Affiliations:
1Michael Baitinger, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863416              
2External Organizations, ou_persistent22              
3Iryna Antonyshyn, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863412              
4Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              
5Raul Cardoso, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863420              
6Ulrich Burkhardt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863422              
7Bodo Böhme, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863408              
8Juri Grin, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863413              

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 Zusammenfassung: Clathrate-I-based materials are promising for waste-heat recovering applications via thermoelectric (TE) effects. However, the lack of highly efficient p-type materials hampers the development of clathrate-based TE devices. In this work, the synthesis of the p-type semiconductor Ba7.8Au5.33Ge40.67 with clathrate-I structure is up-scaled by steel-quenching and spark plasma sintering treatment at 1073 K. A thermoelectric figure of merit ZT approximate to 0.9 at 670 K is reproducibly obtained, and 40 chemically homogeneous module legs of 5 x 5 x 7 mm(3) are fabricated. By using a carbon layer as a diffusion barrier, electrical contacts are sustainable at elevated application temperatures. Eight couples with the clathrate-I compounds Ba7.8Au5.33Ge40.67 as p-type and Ba8Ga16Ge30 as n-type materials are integrated into a TE module with an output power of 0.2 W achieved under a temperature difference Delta T = 380 K (T-1 = 673 K and T-2 = 293 K). The thermoelectric performance of Ba7.8Au5.33Ge40.67 demonstrates the potential of type-I clathrates for waste heat recycling.

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Sprache(n): eng - English
 Datum: 2021-08-122021-08-12
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: ISI: 000684346200005
DOI: 10.1063/5.0059166
 Art des Abschluß: -

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Titel: Applied Physics Letters
  Kurztitel : Appl. Phys. Lett.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Melville, NY : American Institute of Physics
Seiten: - Band / Heft: 119 (6) Artikelnummer: 063902 Start- / Endseite: 1 - 6 Identifikator: ISSN: 0003-6951
CoNE: https://pure.mpg.de/cone/journals/resource/954922836223