| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alloys and Compounds for Thermoelectric and Solar Cell Applications XIII
|
| Presentation Title |
Optimizing ZT and Conversion Efficiency of p-Type Bi2Te3 via Light-Doping and Defect Engineering |
| Author(s) |
Cheng-Yu Tsai, Hsin-Jay Wu |
| On-Site Speaker (Planned) |
Cheng-Yu Tsai |
| Abstract Scope |
This research optimizes the dopant concentration in p-type Bi2Te3 through defect engineering. High resolution x-ray diffraction analysis indicates that the light dopant significantly influences the formation and behavior of defects in the Bi2Te3 crystal, leading to observable changes in lattice parameters and potentially altering the material's overall properties. The p-type Bi2Te3 crystals achieve an impressive peak power factor of 8 mW∙m-1∙K-2, due to the enhanced electrical conductivity, reaching an improved zT value of 1.2 at 303 K. Moreover, the thermoelectric conversion efficiency of the p-type Bi2Te3 single-leg module reaches 3.1% under a temperature difference of 120 K, outperforming conventional BST alloys. These results highlight light-doped p-type Bi2Te3 as a strong contender against the well-established p-type BST alloys due to its superior thermoelectric efficiency. This study sheds light on the importance of defect engineering in thermoelectric materials, opening doors for future developments. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, |