| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alloys and Compounds for Thermoelectric and Solar Cell Applications XIII
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| Presentation Title |
Enhancing Thermoelectric Performance 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 fine-tunes the dopant concentration in p-type Bi2Te3 through defect engineering. High-resolution X-ray diffraction analysis reveals that the introduction of a light dopant notably affects the formation and behavior of defects in the Bi2Te3 crystal. This results in noticeable changes in the lattice parameters, which may consequently modify the overall properties of the material. The p-type Bi2Te3 crystals achieve an impressive peak power factor of 8 mW∙m-1∙K-2, improving the zT value to 1.2 at 303 K. Additionally, the thermoelectric conversion efficiency of the p-type Bi2Te3 single-leg module reaches 3.1% under a temperature difference of 120K, outperforming conventional BST alloys. These results underscore the potential of light-doped p-type Bi2Te3 as a viable competitor to conventional p-type BST alloys, attributable to its improved thermoelectric efficiency. This investigation highlights the critical role of defect engineering in thermoelectric materials, suggesting new avenues for future research and development. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, |