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

Yan, Ruijuan and Xie, Wenjie and Balke, Benjamin and Chen, Guoxing and Weidenkaff, Anke (2020):
Realizing p-type NbCoSn half-Heusler compounds with enhanced thermoelectric performance via Sc substitution.
In: Science and Technology of Advanced Materials, 21 (1), pp. 122-130. Taylor & Francis, ISSN 1468-6996,
DOI: 10.1080/14686996.2020.1726715,
[Article]

Abstract

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, Nb0.95Sc0.05CoSn 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 Nb0.95Sc0.05CoSn compound shows the highest measured figure of merit ZT = 0.13 at 879 K.

Item Type: Article
Erschienen: 2020
Creators: Yan, Ruijuan and Xie, Wenjie and Balke, Benjamin and Chen, Guoxing and Weidenkaff, Anke
Title: Realizing p-type NbCoSn half-Heusler compounds with enhanced thermoelectric performance via Sc substitution
Language: English
Abstract:

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, Nb0.95Sc0.05CoSn 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 Nb0.95Sc0.05CoSn compound shows the highest measured figure of merit ZT = 0.13 at 879 K.

Journal or Publication Title: Science and Technology of Advanced Materials
Journal volume: 21
Number: 1
Publisher: Taylor & Francis
Uncontrolled Keywords: P-type NbCoSn, thermoelectric materials, half-Heusler compound
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Materials and Resources
Date Deposited: 20 May 2020 06:58
DOI: 10.1080/14686996.2020.1726715
Official URL: https://doi.org/10.1080/14686996.2020.1726715
Projects: We would like to acknowledge the financial support from Deutsche Forschungsgemeinschaft (Project No. BA 4171/4-1), and also acknowledge support by the German Research Foundation and the Open Access Publishing Fund of Technische Universitat Darmstadt.
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