Microstructure and electrical performance of Ce0.3Ni1.5Co2.5Sb12 skutterudite from bulk to film

Dou Li, Shuangming Li, Xuguang Li, Bin Yang, Hong Zhong

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The skutterudite CoSb3 has been widely concerned, as one of the most studied candidate materials for thermoelectric applications. Here, n-type bulk skutterudite Ce0.3Ni1.5Co2.5Sb12 was successfully prepared under TGZM effect and its thin film deposited by PLD on single crystal Si substrate, to further understand the effect of microstructure and the electrical transport mechanism on the thermoelectric properties from bulk to thin film. It is found that two phases of Sb and CoSb3 coexist in bulk sample, while abundant nano-granular structures with well-crystallized CoSb3 and little of CeSb generate in the film. As a result, the maximum value of S and PF reach −250 μV/K and 5275 μW/(mK2) for film sample at 673 K. The PF value of film is four times higher than that of the bulk sample. This provides a novel avenue to increase the thermoelectric properties of skutterudite.

Original languageEnglish
Article number130581
JournalMaterials Letters
Volume303
DOIs
StatePublished - 15 Nov 2021

Keywords

  • CoSb
  • Electrical properties
  • Thermoelectric
  • Thin films

Fingerprint

Dive into the research topics of 'Microstructure and electrical performance of Ce0.3Ni1.5Co2.5Sb12 skutterudite from bulk to film'. Together they form a unique fingerprint.

Cite this