Thermoelectric properties of bottom-up assembled Bi₂S_3xTe_x nanocomposites
by Doris Cadavid; Maria Ibáñez; Umberto Anselmi-Tamburini; Oscar Juan Durá; Marco Antonio López de la Torre; Andreu Cabot
International Journal of Nanotechnology (IJNT), Vol. 11, No. 9/10/11, 2014

Abstract: Bi₂S_3xTe_x bulk nanocomposites with crystal domain sizes in the range from 50 nm to 100 nm were obtained from the reaction of Bi₂S₃ nanorods with Te powder. The thermoelectric properties of the obtained nanocomposites were analysed in the temperature range from 0°C to 300°C. We observed how the thermoelectric properties of the material improved with the annealing temperature, being a spark plasma sintering process needed to maintain the material nanostructuration while maximising its electrical properties. Finally thermoelectric dimensionless figures of merit ZT up to 0.42 were obtained before any charge carrier concentration optimisation.

Online publication date: Wed, 14-Jan-2015

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