N-type thermoelectric Ag₈SnSe₆ with extremely low lattice thermal conductivity by replacing Ag with Cu.

ABSTRACT: Argyrodite family compounds inherently possess low lattice thermal conductivity (κ _L) due to the liquid-like behavior of cations and the intimate interplay among mobile ions. Hence, they have become the focus of discussion in thermoelectrics recently. However, the major bottleneck for further improvement of their thermoelectric (TE) performance is their low carrier concentration. In this work, we take an advantage of the unique structure of Ag₈SnSe₆, in an attempt to further reduce the lattice part (κ _L) while at the same time improve their electrical property. The results show that the κ _L value reduces from 0.17 W K^-1 m^-1 to 0.12 W K^-1 m^-1 when Ag is substituted for Cu

SUBMITTER: Yang C 

PROVIDER: S-EPMC8694171 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature