| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alloys and Compounds for Thermoelectric and Solar Cell Applications VIII
|
| Presentation Title |
Optimization of Thermoelectric Performance of Nitrogen- and Boron-doped Carbon Nanotubes |
| Author(s) |
Manaho Matsubara, Kenji Sasaoka, Takahiro Yamamoto |
| On-Site Speaker (Planned) |
Manaho Matsubara |
| Abstract Scope |
Significant enhancement of thermoelectric performance is expected to be achieved by utilizing one-dimensional (1D) materials. Single-walled carbon nanotubes (SWNTs) are potential candidates for 1D nanostructures with high thermoelectric performance as well as flexibility and lightweight. To achieve CNT-based thermoelectric devices, both n-type and p-type semiconducting CNTs are required. We focus on nitrogen-doped (N-substituted) and boron-doped (B-substituted) SWNTs as a typical n-type and p-type semiconducting SWNTs, and we have investigated their thermoelectric properties based on Kubo-Lüttinger theory for thermoelectric effects. In this invited talk, we present that the N-substituted SWNTs exhibit high thermoelectric power factor (PF) when the chemical potential locates neat the conduction band edge. This originates from sharp density of states due to van Hove singularity of 1D materials and high mobility of conduction electron with small effective mass. In addition, we give the optimal N and B concentrations to maximize PF for semiconducting SWNTs with various diameters. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |