Lattice defect engineering advances n-type PbSe thermoelectrics
Sichuan University · Queensland University of Technology · +3 more institutions
Abstract
Te-free thermoelectrics have garnered significant interest due to their immense thermoelectric potential and low cost. However, most Te-free thermoelectrics have relatively low performance because of the strong electrical and thermal transport conflicts and unsatisfactory compatibility of interfaces between device materials. Here, we develop lattice defect engineering through Cu doping to realize a record-high figure of merit of ~1.9 in n-type polycrystalline PbSe. Detailed micro/nanostructural characterizations and first-principles calculations demonstrate that Cu-induced interstitial defects and nanoprecipitates simultaneously optimize electron and phonon transport properties. Moreover, a robust Co/PbSe…
Citation impact
- FWCI
- 17.69
- Percentile
- 100%
- References
- 71
Authors
10Topics & keywords
- Thermoelectric materials
- Materials science
- Nanotechnology
- Engineering physics
- Physics
- Composite material
- Thermal conductivity