Highly efficient Mg2Si-based thermoelectric materials: A review on the micro- and nanostructure properties and the role of alloying

This chapter aims to present an overview of the recent progress in high-performance bulk Mg2(Si/Sn/Ge) thermoelectric materials defining the key approaches for boosting the thermoelectric performance. These include alloying, doping, nanostructuring, band converging, and intentional or spontaneous hierarchical Sn-rich and Si-rich phases’ architecture.