Realizing p-type NbCoSn half-Heusler compounds with enhanced thermoelectric performance via Sc substitution

N-type half-Heusler NbCoSn is a promising thermoelectric material due to favourable electronic properties. It has attracted much attention for thermoelectric applications while the desired p-type NbCoSn counterpart shows poor thermoelectric performance. In this work, p-type NbCoSn has been obtained...

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Detalles Bibliográficos
Autores principales: Yan, Ruijuan, Xie, Wenjie, Balke, Benjamin, Chen, Guoxing, Weidenkaff, Anke
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Taylor & Francis 2020
Materias:
Focus on Thermoelectric Materials
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7054941/
https://www.ncbi.nlm.nih.gov/pubmed/32165991
http://dx.doi.org/10.1080/14686996.2020.1726715
Descripción
Sumario:N-type half-Heusler NbCoSn is a promising thermoelectric material due to favourable electronic properties. It has attracted much attention for thermoelectric applications while the desired p-type NbCoSn counterpart shows poor thermoelectric performance. In this work, p-type NbCoSn has been obtained using Sc substitution at the Nb site, and their thermoelectric properties were investigated. Of all samples, Nb(0.95)Sc(0.05)CoSn compound shows a maximum power factor of 0.54 mW/mK(2) which is the highest among the previously reported values of p-type NbCoSn. With the suppression of thermal conductivity, p-type Nb(0.95)Sc(0.05)CoSn compound shows the highest measured figure of merit ZT = 0.13 at 879 K.

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