2025/11/12 by Sopheap Sam, Sreypich Say, Kosuke Yamazaki +1
Materials Science · Physics and Astronomy · #Advanced Thermoelectric Materials and Devices #Field (mathematics) #Heusler alloys: electronic and magnetic properties #Iron silicide #Semiconductor materials and interfaces #Thermoelectric cooling #Thermoelectric effect #Thermoelectric materials #Work (physics) #structural properties #thermoelectric materials #transport properties
paper · doi:10.48505/nims.5897
published in Institutional Repositories DataBase (IRDB) 26 (National Institute of Informatics)
openalex publication_date 2025/11/12 · openalex created_date 2025/11/13 · openalex updated_date 2026/08/01
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.