Effect of the annealing treatment on structural and transport properties of thermoelectric Smy (Fex Ni1−x )4Sb12 thin films

Giovanna Latronico, Paolo Mele, Chihiro Sekine, Pan Sian Wei, Saurabh Singh, Tsunehiro Takeuchi, Cédric Bourgès, Takahiro Baba, Takao Mori, Pietro Manfrinetti, Cristina Artini

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The crystallographic and transport properties of thin films fabricated by pulsed laser deposition and belonging to the Smy(FexNi1-x )4Sb12 filled skutterudite system were studied with the aim to unveil the effect exerted by temperature and duration of thermal treatments on structural and thermoelectric features. The importance of annealing treatments in Ar atmosphere up to 523 K was recognized, and the thermal treatment performed at 473 K for 3 h was selected as the most effective in improving the material properties. With respect to the corresponding bulk compositions, a significant enhancement in phase purity, as well as an increase in electrical conductivity and a drop in room temperature thermal conductivity, were observed in annealed films. The low thermal conductivity, in particular, can be deemed as deriving from the reduced dimensionality and the consequent substrate/film interfacial stress, coupled with the nanometric grain size.

Original languageEnglish
Article number115705
JournalNanotechnology
Volume34
Issue number11
DOIs
Publication statusPublished - 2023 Mar 12

Keywords

  • skutterudites
  • thermoelectric materials
  • thin films

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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