High‐Performance AgSbTe 2 Thermoelectrics: Advances, Challenges, and Perspectives

Abstract Environmental‐friendless and high‐performance thermoelectrics play a significant role in exploring sustainable clean energy. Among them, AgSbTe 2 thermoelectrics, benefiting from the disorder in the cation sublattice and interface scattering from secondary phases of Ag 2 Te and Sb 2 Te 3 , exhibit low thermal conductivity and a maximum figure‐of‐merit ZT of 2.6 at 573 K via optimizing electrical properties and addressing phase transition issues. Therefore, AgSbTe 2 shows considerable potential as a promising medium‐temperature thermoelectric material. Additionally, with the increasing demands for device integration and portability in the information age, the research on flexible and wearable AgSbTe 2 thermoelectrics aligns with contemporary development needs, leading to a growing number of research findings. This work provides a detailed and timely review of AgSbTe 2 ‐based thermoelectrics from materials to devices. Principles and performance optimization strategies are highlighted for the thermoelectric performance enhancement in AgSbTe 2 . The current challenges and future research directions of AgSbTe 2 ‐based thermoelectrics are pointed out. This review will guide the development of high‐performance AgSbTe 2 ‐based thermoelectrics for practical applications.