Enhancing thermoelectric performance of n-type PbSe via additional meso-scale phonon scattering

By introducing mesostructures, the lattice thermal conductivity at 300 K can be reduced from ∼1.3 W m −1 K −1 to ∼1.2 W m −1 K −1 , and ∼0.9 W m −1 K −1 to ∼0.6 W m −1 K −1 at 923 K in an n-type PbSe–PbS system.