| Abstract Scope |
SnSe, a two-dimensional material, has gained significant attention due to its layered structure, which enables electron transport between Van der Waals gaps, resulting in high electrical conductivity. Combined with its naturally low thermal conductivity, SnSe has become a prominent focus in recent thermoelectric research. Previous studies have primarily introduced sodium to improve the low carrier concentration of SnSe, effectively enhancing its electrical conductivity. However, the high chemical reactivity of sodium causes significant risks. Thus, this study aims to improve its thermoelectric properties by doping with cations other than Na. The electrical conductivity and carrier concentration reach optimal levels after introducing several cations, resulting in a power factor of more than 5 mWm-1K-2. Additionally, the thermal conductivity is effectively suppressed by multiple cations, fulfilling high performance with zT ~ 1.1 at room temperature, suggesting potential practical applications in thermoelectric devices. |