Ultralow Lattice Thermal Conductivity and Improved Thermoelectric Performance in Cl-Doped Bi₂Te_3-xSe_x Alloys.

ABSTRACT: Bi₂Te₃-based alloys are the main materials for the construction of low- and medium-temperature thermoelectric modules. In this work, the microstructure and thermoelectric properties of Cl-doped Bi₂Te_3-xSe_x alloys were systematically investigated considering the high anisotropy inherent in these materials. The prepared samples have a highly oriented microstructure morphology, which results in very different thermal transport properties in two pressing directions. To accurately separate the lattice, electronic, and bipolar components of the thermal conductivity over the entire temperature range, we employed a two-band Kane model to the Cl-doped Bi₂Te_3-xSe_x alloys. It was establ

SUBMITTER: Parashchuk T 

PROVIDER: S-EPMC9335406 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature