[17a-P01-1~29] 9 Applied Materials Science (Poster)

[17a-P01-21] Evaluation of Atmospheric Stability and Thermoelectric Performance of Epitaxial Mg₃Bi₂ Thin Films

〇Takeru Kuriyama¹, Akito Ayukawa¹, Kouki Nejo¹, Haruhiko Udono¹, Shunya Sakane¹ (1.Ibaraki Univ.)

Keywords:

Thin film,Mg3Bi2,Zintl phase compound

Mg₃(SbBi)₂ is a promising alternative to Bi₂Te₃, a typical thermoelectric material, due to its low toxicity and low cost. In this study, we attempted to fabricate Mg₃Bi₂ thin films with excellent atmospheric stability by epitaxial growth of a Mg₃Sb₂ layer on a Mg₃Bi₂ layer. XRD analysis showed that the crystal structure of the sample without a Mg₃Sb₂ layer degraded in a short time, while the sample with a Mg₃Sb₂ layer maintained its crystal structure for over two weeks. The sample with the Mg₃Sb₂ layer showed a higher power factor than the sample without the Mg₃Sb₂ layer.