Improvement of Power Factor of CoSb3 Thermoelectric Thin Films via Microstructure Optimization

Abstract : Skutterudite CoSb3 has emerged as one of the most studied candidate materials for thermoelectric applications. In this work, CoSb3 thin films were prepared by radio frequency sputtering, and their microstructure was investigated with emphasis on the effect of target composition and deposition temperature. The goal was to enhance the thermoelectric properties of CoSb3 thin films via microstructure optimization. Results showed that the Sb content of films gradually decreased with increasing deposition temperature. Although the thin films prepared by the target with a Co and Sb element ratio of 1:3.5 approached the ideal stoichiometric ratio, they showed poor thermoelectric properties due to the formation of an additional Sb phase. By contrast, the thin films obtained with insufficient Sb showed a single CoSb3 phase and good thermoelectric properties. The mechanism behind this difference was studied accordingly. The power factor of the thin films was enhanced due to their dense structure and good crystallization.
Document type :
Journal articles
Liste complète des métadonnées

Cited literature [13 references]  Display  Hide  Download

https://hal-univ-rennes1.archives-ouvertes.fr/hal-01671257
Contributor : Laurent Jonchère <>
Submitted on : Thursday, June 21, 2018 - 9:19:03 AM
Last modification on : Saturday, December 22, 2018 - 7:33:41 PM
Document(s) archivé(s) le : Tuesday, September 25, 2018 - 4:32:59 AM

File

Zheng - Improvement of Power F...
Publisher files allowed on an open archive

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Citation

Zhuanghao Zheng, Meng Wei, Fu Li, Jingting Luo, Guangxing Liang, et al.. Improvement of Power Factor of CoSb3 Thermoelectric Thin Films via Microstructure Optimization. Coatings, MDPI, 2017, 7 (11), pp.205. ⟨10.3390/coatings7110205⟩. ⟨hal-01671257⟩

Share

Metrics

Record views

84

Files downloads

24