| Abstract Scope |
SnSe, known for its two-dimensional layered structure, has gained considerable attention in the field of thermoelectric materials. This structure facilitates electron transport through Van der Waals gaps, contributing to its high electrical conductivity. Combined with its naturally low thermal conductivity, SnSe has emerged as a prominent candidate in thermoelectric research. Traditionally, sodium doping has been employed to address the low carrier concentration of SnSe, thereby enhancing its electrical conductivity. However, the high chemical reactivity of sodium introduces significant risks. In this study, alternative cation doping strategies are explored to improve the thermoelectric properties of SnSe. By introducing various cations, the electrical conductivity and carrier concentration are optimized, resulting in a power factor exceeding 5 mWm-1K-2. Moreover, the presence of multiple cations effectively reduces thermal conductivity, achieving a high thermoelectric performance with a zT value of approximately 1.1 at room temperature. |