Titanium-based silicide quantum dot superlattices for thermoelectrics applications
MONTÈS, Laurent
Institut de Microélectronique, Electromagnétisme et Photonique - Laboratoire d'Hyperfréquences et Caractérisation [IMEP-LAHC]
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Institut de Microélectronique, Electromagnétisme et Photonique - Laboratoire d'Hyperfréquences et Caractérisation [IMEP-LAHC]
Langue
en
Article de revue
Ce document a été publié dans
Nanotechnology. 2015, vol. 26, n° 27, p. 275605
Institute of Physics
Résumé en anglais
Ti-based silicide quantum dot superlattices (QDSLs) are grown by reduced-pressure chemical vapor deposition. They are made of titanium-based silicide nanodots scattered in an n-doped SiGe matrix. This is the first time ...Lire la suite >
Ti-based silicide quantum dot superlattices (QDSLs) are grown by reduced-pressure chemical vapor deposition. They are made of titanium-based silicide nanodots scattered in an n-doped SiGe matrix. This is the first time that such nanostructured materials have been grown in both monocrystalline and polycrystalline QDSLs. We studied their crystallographic structures and chemical properties, as well as the size and the density of the quantum dots. The thermoelectric properties of the QDSLs are measured and compared to equivalent SiGe thin films to evaluate the influence of the nanodots. Our studies revealed an increase in their thermoelectric properties specifically, up to a trifold increase in the power factor, with a decrease in the thermal conductivity making them very good candidates for further thermoelectric applications in cooling or energy-harvesting fields.< Réduire
Mots clés en anglais
Quantum Dots Superlattices
Nanostructures
Silicides
Thermoelectrics
CVD
Origine
Importé de halUnités de recherche