| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alloys and Compounds for Thermoelectric and Solar Cell Applications XI
|
| Presentation Title |
Shapes of Phase Boundaries in Isothermal Phase Diagrams |
| Author(s) |
Adetoye Adekoya, G. Jeffrey Snyder |
| On-Site Speaker (Planned) |
Adetoye Adekoya |
| Abstract Scope |
Doping/alloying is essential to controlling the electrical and thermal properties of thermoelectric materials. The solubility of these dopants in the bulk system is often in such dilute concentrations that they can best be described as 0-D defects in an otherwise essentially uniform crystal. Though dilute, the defects can nevertheless be visualized on a phase diagram as providing some width to nominally single-phase regions. The area/width of this phases are known to be set directly by the defect energy of the defects, however little attention is paid to the shape of these regions even though they can have tremendous impact on the maximum defect solubility achievable and offer a thermodynamic guide towards engineering of materials. The thermodynamic factors that impact the shape of the phase diagrams is used to derive an analytic expression for the expected shape and show how they can provide a guide to optimal doping of semiconductors. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, Modeling and Simulation, Other |