Journal article

Publication year: 2018

Journal: AIP Advances

Volume number: 8

Issue number: 7

ISSN: 2158-3226

Open access status: Gold

DOI Link: https://doi.org/10.1063/1.5034525

Publisher: American Institute of Physics

Abstract: 
Thermoelectric figures of merit of ZT approximate to 0.4 at room temperature were achieved in nanostructured composite materials prepared by uniaxial pressing of Bi1-xSbx nanoparticles and 0.3 wt.% of a carbon phase. This constitutes a significant improvement of the low-temperature thermoelectric material Bi1-xSbx and strongly suggests the possibility of employing these materials in efficient thermoelectric devices working at room temperature. Interestingly, the beneficial effect of the carbon phase added to nanostructured Bi1-xSbx is the same for either carbon nanotubes or active carbon. This finding is attributed, on the one hand, to a combination of electronic band gap engineering due to nanostructuring and energy filtering due to graphene-like interlayers between Bi1-xSbx grains and, on the other hand, to modified phonon scattering at the grain boundaries and additional phonon scattering by agglomeration sites of carbon material on the mu m scale. (C) 2018 Author(s). All article

Harvard Citation style: Guenes, E., Wickleder, M., Mueller, E., Elm, M. and Klar, P. (2018) Improved thermoelectric properties of nanostructured composites out of Bi_1-xSb_x nanoparticles and carbon phases, AIP Advances, 8(7), Article 075319. https://doi.org/10.1063/1.5034525

APA Citation style: Guenes, E., Wickleder, M., Mueller, E., Elm, M., & Klar, P. (2018). Improved thermoelectric properties of nanostructured composites out of Bi_1-xSb_x nanoparticles and carbon phases. AIP Advances. 8(7), Article 075319. https://doi.org/10.1063/1.5034525