Polycrystalline SnSe Thermoelectrics: New Opportunity and Challenge

Polycrystalline SnSe is considered as a highly promising candidates for thermoelectric application due to facile processing, machinability and scale-up application. Developing high-performance polycrystalline SnSe has become a critical research direction. Unfortunately, ZT values in polycrystalline SnSe are far less than that of single crystal because polycrystalline SnSe show much lower electrical conductivity and relatively higher thermal conductivity. Here, we presents our recent research progress on polycrystalline SnSe. We demonstrated that thermoelectric performance have been significantly enhanced in polycrystalline SnSe through proposed strategy. Finally, we discusses the future challenges facing polycrystalline SnSe thermoelectric materials.