Half-Heusler alloys are leading candidate materials for large scale thermoelectric power generation. In the past decade, substantial improvements have been made to the established n-types based on XIVNiSn, and exciting...

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The thermoelectric performance of ACuP (A = Mg and Ca) with abundant elements and low gravimetric density is reported. Both systems are p-type doped by intrinsic Cu vacancy defects, have...

Addition of Cu to XNiSn half-Heuslers improves homogeneity and reduces thermal conductivity without affecting electron mobility.

Microstructure and point defects are central to thermoelectric performance in vacancy half-Heuslers.