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Description:

Iron silicide (β-FeSi2) has attracted considerable interest as a sustainable thermoelectric material due to its abundance, non-toxicity, and environmental compatibility. Their conduction flexibility allows a wide range of dopants to tune transport behavior, creating opportunities for improved performance. However, dopant solubility limits and the formation of secondary phases remain key challenges. In this article, we highlight recent advances in strategies to enhance the thermoelectric performance of β-FeSi2-based materials and discuss the interplay between phase evolution, electrical, and thermal transport. We also outline prospects that may unlock further improvements, offering pathways toward higher thermoelectric efficiency in this material system.

Impact Statement

This review covers the observation of structural transition and strategies to enhance electrical and thermoelectric properties of metal-doped iron silicides, providing insights for future research to improve material performance.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: Iron silicide, structural properties, transport properties, thermoelectric materials

Date published: 2025-12-31

Publisher: Taylor & Francis

Journal:

• Science and Technology of Advanced Materials (ISSN: 14686996) vol. 26 2585555

Funding:

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5897

First published URL: https://doi.org/10.1080/14686996.2025.2585555

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Updated at: 2025-11-13 08:30:08 +0900

Published on MDR: 2025-11-13 08:22:06 +0900