Nano-Mesoscopic Scale Microstructure Regulation for p-Type Skutterudite Thermoelectric Materials

Skutterudite thermoelectric materials are one of the most promising candidates for critical components in thermoelectric devices because of their excellent electrical transport properties. Thermoelectric devices require p- and n-type skutterudite materials with matching properties. However, the ptype skutterudite materials have considerably worse thermoelectric and mechanical properties than those of n-type. Thus, it is important to enhance the thermoelectric and mechanical properties of p-type skutterudite materials for the development of high-efficiency thermoelectric devices. This study summarizes the recent research progress on the nano-mesoscopic scale regulation of the microstructure for p-type skutterudite thermoelectric materials. The thermoelectric and mechanical properties of p-type skutterudite materials can be notably enhanced by adjusting the microstructure at the nano-mesoscopic scale; thus, providing scientific and technical supports for the thermoelectric device's application.