Article Data-driven analysis of electron relaxation times in PbTe-type thermoelectric materials

Yukari Katsura SAMURAI ORCID (National Institute for Materials ScienceROR) ; Masaya Kumagai ; Takushi Kodani ; Mitsunori Kaneshige ; Yuki Ando (National Institute for Materials ScienceROR) ; Sakiko Gunji ; Yoji Imai ; Hideyasu Ouchi ; Kazuki Tobita ; Kaoru Kimura ; Koji Tsuda SAMURAI ORCID (National Institute for Materials ScienceROR)

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Yukari Katsura, Masaya Kumagai, Takushi Kodani, Mitsunori Kaneshige, Yuki Ando, Sakiko Gunji, Yoji Imai, Hideyasu Ouchi, Kazuki Tobita, Kaoru Kimura, Koji Tsuda. Data-driven analysis of electron relaxation times in PbTe-type thermoelectric materials. Science and Technology of Advanced Materials. 2019, 20 (1), 511-520. https://doi.org/10.1080/14686996.2019.1603885
SAMURAI

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(abstract)

Data mining from published papers can generate large experimental datasets that have been overlooked in computational materials informatics. We developed an open web system Starrydata2 to accelerate a comprehensive digitization of data of materials from as-reported plot images in published papers, without sample selection based on performance. By plotting results obtained from our dataset on experimental thermoelectric properties of 434 samples of rock-salt-type (PbTe-type) thermoelectric materials, we revealed differences in electronic structure of parent compounds PbTe, PbSe, PbS, and SnTe from just experimental data. We observed that the calculated Seebeck coefficients were fairly consistent with experimental data for n-type PbTe but not for p-type PbTe, indicating possible modifications in its valence-band electronic structure. We evaluated the electron relaxation time τel from 207 reported samples of n-type PbTe by combining calculations and experimental data. We found that τel is not a constant but varies by at least two orders of magnitude. Achieving long τel was suggested to be critical in increasing the thermoelectric figure of merit ZT.

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Keyword: materials informatics, database, data curation, thermoelectric materials, first-principles calculation, electron relaxation time

Date published: 2019-12-31

Publisher: Informa UK Limited

Journal:

  • Science and Technology of Advanced Materials (ISSN: 14686996) vol. 20 issue. 1 p. 511-520

Funding:

  • Japan Science and Technology Agency “Materials Research by Information Integration” Initiative (MI2I) project of the Support Program for Starting Up Innovation Hub
  • KAKENHI 16K14379
  • Watanabe memorial foundation for the advancement of new technology H30-463

Manuscript type: Publisher's version (Version of record)

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First published URL: https://doi.org/10.1080/14686996.2019.1603885

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Updated at: 2024-10-10 16:31:01 +0900

Published on MDR: 2024-10-10 16:31:01 +0900

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