Tin-Substituted Chalcopyrite: An n-Type Sulfide with Enhanced Thermoelectric Performance.

ABSTRACT: The dearth of n-type sulfides with thermoelectric performance comparable to that of their p-type analogues presents a problem in the fabrication of all-sulfide devices. Chalcopyrite (CuFeS₂) offers a rare example of an n-type sulfide. Chemical substitution has been used to enhance the thermoelectric performance of chalcopyrite through preparation of Cu_1-x Sn _x FeS₂ (0 ≤ x ≤ 0.1). Substitution induces a high level of mass and strain field fluctuation, leading to lattice softening and enhanced point-defect scattering. Together with dislocations and twinning identified by transmission electron microscopy, this provides a mechanism for scattering phonons with a wide range of mean free paths. Substituted mater

SUBMITTER: Tippireddy S 

PROVIDER: S-EPMC9281371 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature