Materials, Volume 18, Issue 13
2025 July-1 - 286 articles
Cover Story: The half-Heusler compound NbCoSn is a promising thermoelectric material due to its favourable electrical properties and excellent thermal stability. Enhancing its thermoelectric performance typically involves doping and microstructural modifications. In this work, Ni was introduced into NbCoSn to form NbCoNixSn (x = 0–1), and the impact of varying Ni content on its structure and thermoelectric properties was systematically investigated. At lower doping levels, Ni occupies interstitial positions, forming solid solutions. As the Ni concentration increases, full-Heusler secondary phases appear, forming HH-FH composites. A distinct transition from the HH to FH phase occurs as Ni content rises. These structural changes, along with the introduction of in-gap states, influence the electronic structure and phonon scattering behaviour, leading to improvements in the thermoelectric performance. View this paper - Issues are regarded as officially published after their release is announced to the table of contents alert mailing list .
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