SAVELLI, Guillaume; SILVEIRA STEIN, Sergio; BERNARD-GRANGER, Guillaume; FAUCHERAND, Pascal; MONTÈS, Laurent; DILHAIRE, Stefan; PERNOT, Gilles

doi:10.1088/0957-4484/26/27/275605

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SAVELLI, Guillaume
Thermoelectricity Laboratory [CEA, LITEN]

SILVEIRA STEIN, Sergio
Thermoelectricity Laboratory [CEA, LITEN]

BERNARD-GRANGER, Guillaume
Thermoelectricity Laboratory [CEA, LITEN]

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Nanotechnology. 2015, vol. 26, n° 27, p. 275605

Institute of Physics

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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.< Leer menos

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Quantum Dots Superlattices

Nanostructures

Silicides

Thermoelectrics

CVD

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Titanium-based silicide quantum dot superlattices for thermoelectrics applications

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