Realizing Ultrahigh Near-Room-Temperature Thermoelectric Figure of Merit for N-Type Mg₃(Sb,Bi)₂ through Grain Boundary Complexion Engineering with Niobium.

ABSTRACT: Despite decades of extensive research on thermoelectric materials, Bi₂Te₃ alloys have dominated room-temperature applications. However, recent advancements have highlighted the potential of alternative candidates, notably Mg₃Sb₂-Mg₃Bi₂ alloys, for low- to mid-temperature ranges. This study optimizes the low-temperature composition of this alloy system through Nb addition (Mg_3.2-xNb_x(Sb_0.3Bi_0.7)_1.996Te_0.004), characterizing composition, microstructure, and transport properties. A high Mg₃Bi₂ content improves the band structure by increasing weighted mobility while enhancing the microstructure. Crucially, it suppresses detrime

SUBMITTER: Ozen M 

PROVIDER: S-EPMC11577319 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature