Giant Room-Temperature Power Factor in p-Type Thermoelectric SnSe under High Pressure.

ABSTRACT: Materials that can efficiently convert heat into electricity are widely utilized in energy conversion technologies. The existing thermoelectrics demonstrate rather limited performance characteristics at room temperature, and hence, alternative materials and approaches are very much in demand. Here, it is experimentally shown that manipulating an applied stress can greatly improve a thermoelectric power factor of layered p-type SnSe single crystals up to ≈180 µW K^-2 cm^-1 at room temperature. This giant enhancement is explained by a synergetic effect of three factors, such as: band-gap narrowing, Lifshitz transition, and strong sample deformation. Under applied pressure above 1 GPa, the SnSe crystals become more ductile, which can be related to changes in the prevailing

SUBMITTER: Morozova NV 

PROVIDER: S-EPMC9284162 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature