Article Revisiting Pisarenko’s formula: Effective mass estimation, thermopower–conductivity relation, and maximum power factor prediction

Andrei Novitskii SAMURAI ORCID (National Institute for Materials Science) ; Takao Mori SAMURAI ORCID (National Institute for Materials Science)

Materials Today Physics---Revisiting Pisarenko’s formula Effective mass estimation, thermopower–conductivity relation, and maximum power factor prediction.pdf
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Andrei Novitskii, Takao Mori. Revisiting Pisarenko’s formula: Effective mass estimation, thermopower–conductivity relation, and maximum power factor prediction. Materials Today Physics. 2025, 58 (), 101845. https://doi.org/10.1016/j.mtphys.2025.101845

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(abstract)

The thermopower α (also known as the Seebeck coefficient) is one of the most fundamental material characteristics for understanding charge carrier transport in thermoelectric materials. Here, we revisit the Pisarenko formula for the thermopower, which was traditionally considered valid only for non-degenerate semiconductors. We demonstrate that regardless of the dominating scattering mechanism, the Pisarenko formula describes accurately enough the relationship between thermopower α and charge carrier concentration n
beyond the non-degenerate limit. Moreover, the Pisarenko formula provides a simple thermopower-conductivity relation, α = ± keB (b − lnσ), where b is a constant determined by the scattering mechanism and weighted mobility µw, and σ is the electrical conductivity. This relation is valid for materials with α > 90µVK−1 when acoustic phonon scattering is predominant. This offers an alternative way to analyze electron transport when Hall measurements are difficult or inaccessible. Additionally, we show how the Pisarenko formula can be used to estimate the maximum power factor of a thermoelectric material from the weighted mobility of a single, not necessarily optimized, sample at any given temperature.

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Keyword: thermoelectric

Date published: 2025-08-30

Publisher: Elsevier BV

Journal:

  • Materials Today Physics (ISSN: 25425293) vol. 58 101845

Funding:

  • JST-Mirai Program JPMJMI19A1
  • Japan Science and Technology Agency
  • National Institute for Materials Science

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

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First published URL: https://doi.org/10.1016/j.mtphys.2025.101845

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Updated at: 2025-11-10 12:30:40 +0900

Published on MDR: 2025-11-10 12:24:32 +0900

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