3D BiTe Interconnected Nanowire Networks to Increase Thermoelectric Efficiency
Ruiz-Clavijo, Alejandra (Instituto de Micro y Nanotecnología)
Caballero-Calero, Olga (Instituto de Micro y Nanotecnología)
Manzano, Cristina V. (Instituto de Micro y Nanotecnología)
Maeder, Xavier (Swiss Federal Laboratories for Materials Science and Technology)
Beardo Ricol, Albert (Universitat Autònoma de Barcelona. Departament de Física)
Cartoixà Soler, Xavier (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Àlvarez Calafell, Francesc Xavier (Universitat Autònoma de Barcelona. Departament de Física)
Martín-González, Marisol (Instituto de Micro y Nanotecnología)

Date:	2021
Abstract:	3D interconnected nanowire scaffoldings are shown to increase the thermoelectric efficiency in comparison to similar diameter 1D nanowires and films grown under similar electrodeposition conditions. BiTe 3D nanonetworks offer a reduction in thermal conductivity (κ) while preserving the high electrical conductivity of the films. The reduction in κ is modeled using the hydrodynamic heat transport equation, and it can be understood as a heat viscosity effect due to the 3D nanostructuration. In addition, the Seebeck coefficient is twice that of nanowires and films, and up to 50% higher than in a single crystal. This increase is interpreted as a nonequilibrium effect that the geometry of the structure induces on the distribution function of the phonons, producing an enhanced phonon drag. These thermoelectric metamaterials have higher performance and are fabricated with large areas by a cost-effective method, which makes them suitable for up-scale production.
Grants:	Agencia Estatal de Investigación PID2020-118430GB-I00 Agencia Estatal de Investigación RTI2018-097876-B-C22 Agencia Estatal de Investigación RTI2018-097876-B-C21 Ministerio de Economía y Competitividad CSIC13-4E-1794
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Thermoelectricity ; Nanostructure ; Nanowire ; Scaffold ; Bismuth telluride ; Zt ; Metamaterial ; Metastructure
Published in:	ACS Applied Energy Materials, Vol. 4, Issue 12 (December 2021) , p. 13556-13566, ISSN 2574-0962

DOI: 10.1021/acsaem.1c02129
PMID: 35647490

11 p, 2.8 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Grup de Propietats de Transport a la Nanoescala
Articles > Research articles
Articles > Published articles