Enhanced Thermoelectric Efficiency in P-Type MgSb: Role of Monovalent Atoms Codoping at Mg sites.

Due to natural abundance, low cost, and compatibility with sustainable green technology, MgSb-based Zintl compounds are comprehensively explored as potential thermoelectric materials for near-room temperature applications. The effective use of these materials in thermoelectric devices requires both p and n-type MgSb having comparable thermoelectric efficiency. However, p-type MgSb has inferior thermoelectric efficiency efficiency compared to its n-type counterpart due to low electrical conductivity .