| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alloys and Compounds for Thermoelectric and Solar Cell Applications XII
|
| Presentation Title |
Engineering Electronic Properties of Thermoelectric Semiconductors |
| Author(s) |
G. Jeffrey Jeffrey Snyder |
| On-Site Speaker (Planned) |
G. Jeffrey Jeffrey Snyder |
| Abstract Scope |
Thermoelectric semiconductors often have complex electronic properties yet they can be modeled with a simple effective mass model. Good thermoelectric materials require a high weighted mobility which serves as the electronic component to the thermoelectric quality factor that determines peak zT. Often complex band structures with multi-valley Fermi surfaces are associated with high weighted mobility. This complexity arises from orbital chemistry as well as structure. Band inversion that leads to topological insulating behavior can also warp bands giving them high valley degeneracy such as found in Bi2Te3.In some systems the Fermi surface pockets can be anisotropic and even non-ellipsoidal, such as the tubes of Fermi surface found in SrTiO3 and Pb and Ge Chalcogenides. Tubes or sheets of Fermi surface rather than ellipsoidal pockets leads to a density of states like 1D or 2D low dimensional materials and high effective valley degeneracy. |
| Proceedings Inclusion? |
Planned: |