Optimized hetero-interfaces by tuning 2D SnS2 thickness in Bi2Te2.7Se0.3/SnS2 nanocomposites to enhance thermoelectric performance

Tuning the electron and phonon transport properties of thermoelectric materials to partially decouple electrical conductivity, Seebeck coefficient and thermal conductivity is the core issue to improve the conversion efficiency. Herein, Bi2Te2.7Se0.3/SnS2 nanocomposites with a unique hetero-structure that the 2D atomically thin SnS2 nanosheets (2–15 nm) homogeneously assembled on BTS grain boundaries have been successfully synthesized to explore...