Boosting Thermoelectric Performance of Bi₂ Te₃ Material by Microstructure Engineering.

ABSTRACT: Due to the intrinsic contradiction of electrical conductivity and Seebeck coefficient in thermoelectric materials, the enhancement for the power factor (PF) is limited. Since the PF decides the output power, strategies to the enhancement of PF are of paramount importance. In this work, Bi₂ Te₃ /Sb and Bi₂ Te₃ /W multilayer films are proposed to enhance the thermoelectric properties. Both systems possess extremely high conductivity of ≈5.6 × 10⁵ S m^-1 . Moreover, the electrical conductivity and Seebeck coefficient simultaneously increase as temperature rising, showing the overcome of the intrinsic contradiction. This results in ultrahigh PFs of 1785 µWm^-1  K^-2 for Bi₂ Te₃ /W and of

SUBMITTER: Wang G 

PROVIDER: S-EPMC10853752 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature