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Controlling the shape of hexagonal structure by growth condition improves the thermoelectric properties of p-type Bi-Te films.
- Source :
-
Journal of the European Ceramic Society . Dec2023, Vol. 43 Issue 16, p7493-7498. 6p. - Publication Year :
- 2023
-
Abstract
- Improving the thermoelectric (TE) properties of typical p-type Bi 0.5 Sb 1.5 Te 3 film is crucial for power generation in film-based thermoelectric devices. The shape of the hexagonal structure in the Bi 0.5 Sb 1.5 Te 3 film can be controlled by adjusting the magnetron sputtering parameters. The results indicate that a high nucleation rate under high sputtering power promotes island growth with a preferred orientation of (015). Thermal energy influences the growth in the in-plane direction along the (00 l) orientation and induces the c-axis orientation in the out-of-plane direction. Consequently, a dense layered hexagonal structure with a high grain boundary density is formed, leading to increased defect density, carrier concentration, and phonon scattering. In this case, the power factor reaches 3149.01 μW·m-1·K-2 at 480 K and the ZT value is 1.14 at 480 K. These results indicate that the film with a dense layered hexagonal structure enhances the TE properties. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09552219
- Volume :
- 43
- Issue :
- 16
- Database :
- Academic Search Index
- Journal :
- Journal of the European Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 171830008
- Full Text :
- https://doi.org/10.1016/j.jeurceramsoc.2023.07.053