Wide-temperature-range thermoelectric n-type Mg₃(Sb,Bi)₂ with high average and peak zT values.

ABSTRACT: Mg₃(Sb,Bi)₂ is a promising thermoelectric material suited for electronic cooling, but there is still room to optimize its low-temperature performance. This work realizes >200% enhancement in room-temperature zT by incorporating metallic inclusions (Nb or Ta) into the Mg₃(Sb,Bi)₂-based matrix. The electrical conductivity is boosted in the range of 300-450 K, whereas the corresponding Seebeck coefficients remain unchanged, leading to an exceptionally high room-temperature power factor >30 μW cm^-1 K^-2; such an unusual effect originates mainly from the modified interfacial barriers. The reduced interfacial barriers are conducive to carrier transport at low and high temperatures. Furthermore, benefiting from the reduced lattice t

SUBMITTER: Li JW 

PROVIDER: S-EPMC10654674 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature