Thermal conductivity and enhanced thermoelectric performance of SnTe bilayer
| Autor: | Raad Haleoot, Bothina Hamad, Abhiyan Pandit |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Condensed Matter - Materials Science
Electron mobility Materials science Condensed matter physics Phonon 020502 materials Mechanical Engineering Bilayer Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences 02 engineering and technology Thermal conductivity 0205 materials engineering Mechanics of Materials Electrical resistivity and conductivity Monolayer Thermoelectric effect General Materials Science Elastic modulus |
| Zdroj: | Journal of Materials Science. 56:10424-10437 |
| ISSN: | 1573-4803 0022-2461 |
| Popis: | Tin chalcogenides (SnS, SnSe, and SnTe) are the emerging key thermoelectric (TE) materials with low toxicity and eco-friendly nature, which could serve as an alternative to the toxic lead-based alloys. The Sn-based alloys are also found to have improved TE properties upon the reduction of their dimensionality. The structural optimization, molecular dynamics and phonon transport calculations predicted the tilted AA + s stacked two-dimensional (2D) SnTe bilayer as the energetically stable structure. The deformation potential theory was used to evaluate the carrier mobility and relaxation time, which are found to be relatively high due to the high 2D elastic modulus, low deformation potential constant and moderate effective masses. The SnTe bilayer shows a high Seebeck coefficient (> 400 μV K−1), high electrical conductivity and significantly low lattice thermal conductivity ( |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
| Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |