Thermoelectric Properties of Sn-Containing Mg 2 Si Nanostructures

Hilal Balout; Pascal Boulet; Marie-Christine Record

doi:10.1021/acs.jpcc.5b03351

Journal articles

Thermoelectric Properties of Sn-Containing Mg 2 Si Nanostructures

Hilal Balout ¹ Pascal Boulet ² Marie-Christine Record ^{3, 2}

1 MADIREL - Matériaux divisés, interfaces, réactivité, électrochimie

2 AMU - Aix Marseille Université

3 IM2NP - Institut des Matériaux, de Microélectronique et des Nanosciences de Provence

Abstract : The thermoelectric performance of Mg2Si- containing nanomaterials are predicted based on density- functional and Boltzmann’s transport theories. The investigated materials are Mg2Si1−xSnx thin films with x = 0.125 and x = 0.625, and (Mg2Si)1−x (Mg2Sn)x (x = 0.4 and x = 0.6) in the form of either superlattices or assembled nanosticks. The calculated properties (Seebeck coefficient S, electrical con- ductivity σ, and power factor S2σ) are compared with those of bulk Mg2Si1−xSnx. It is shown that the thin films outperform the bulk materials at low temperature (350 K) as they exhibit a higher Seebeck coefficient and comparable electrical conductiv- ity. A low electrical conductivity at 900 K is responsible for the counter-performance of the films. Superlattices are attractive structures as p-doped materials at both low charge carrier concentration/high temperature and high charge carrier concentration/high temperature. The assembled nanosticks are interesting materials at low carrier concentration/low temperature only.

Document type :

Journal articles

Domain :

Chemical Sciences / Material chemistry

Chemical Sciences / Theoretical and/or physical chemistry

Complete list of metadata

https://hal-amu.archives-ouvertes.fr/hal-01483322
Contributor : Pascal Boulet Connect in order to contact the contributor
Submitted on : Sunday, March 5, 2017 - 12:23:52 PM
Last modification on : Tuesday, December 14, 2021 - 8:34:02 AM

Thermoelectric Properties of Sn-Containing Mg 2 Si Nanostructures

Identifiers

Collections

Citation

Export

Metrics

Thermoelectric Properties of Sn-Containing Mg 2 Si Nanostructures

Identifiers

Collections

Citation

Export

Share

Metrics