Realizing p-type NbCoSn half-Heusler compounds with enhanced thermoelectric performance via Sc substitution. Issue 1 (31st January 2020)

• Record Type: Journal Article
• Authors: Yan, Ruijuan; Xie, Wenjie; Balke, Benjamin; Chen, Guoxing; Weidenkaff, Anke
• Is Part Of: Science and technology of advanced materials. Volume 21:Issue 1(2020)
• Page Start: 122
• Page End: 130
• Publication Date: 2020-01-31
• Subjects: P-type NbCoSn -- thermoelectric materials -- half-Heusler compound; 210 Thermoelectronics -- Thermal transport -- insulators -- 206 Energy conversion -- transport -- storage -- recovery; Materials -- Technological innovations -- Periodicals; 620.112
• DOI: 10.1080/14686996.2020.1726715
• Languages: English
• ISSNs: 1468-6996

Abstract

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, Nb0.95 Sc0.05 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 Nb0.95 Sc0.05 CoSn compound shows the highest measured figure of merit ZT = 0.13 at 879 K. GRAPHICAL ABSTRACT: uf0001