| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alloys and Compounds for Thermoelectric and Solar Cell Applications IX
|
| Presentation Title |
Solid-state thermionic Devices: Effect of Asymmetry on the Device Performance |
| Author(s) |
Md Golam Rosul, Mona Zebarjadi |
| On-Site Speaker (Planned) |
Md Golam Rosul |
| Abstract Scope |
Solid-state thermionic (SSTI) devices are metal-semiconductor-metal structures with operation principles similar to thermoelectric devices. The semiconducting layer thickness is smaller than the mean-free-path ensuring ballistic transport and is larger than several atomic layers to suppress the tunneling current and ensure thermionic transport. Van der Waals (vdW) heterostructures are considered good candidates as the semiconductor layer due to their weak thermal conduction in the cross-plane direction and ability to tune barrier height by changing the number of layers. The maximum theoretical zT value of 3 is predicted for these structures. Here, we study the effect of structural asymmetry on the performance of vdW based SSTI devices. Such structural asymmetry is a common feature in vacuum-state devices but has not been investigated in SSTIs. In these devices 3-5 layers of two-dimensional transition metal dichalcogenides are sandwiched between two dissimilar metallic electrodes and the effect of asymmetry on the device performance is investigated. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Energy Conversion and Storage, Environmental Effects |