English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/181544
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:

Title

Ultra-low thermal conductivities in large-area Si-Ge nanomeshes for thermoelectric applications

AuthorsPérez Taborda, Jaime Andrés ; Muñoz Rojo, Miguel ; Maiz, Jon ; Neophytou,Neophytos; Martín-González, Marisol
Issue Date21-Sep-2016
PublisherNature Publishing Group
CitationScientific Reports 6: 32778 (2016)
AbstractIn this work, we measure the thermal and thermoelectric properties of large-area Si0.8Ge0.2 nano-meshed films fabricated by DC sputtering of Si0.8Ge0.2 on highly ordered porous alumina matrices. The Si0.8Ge0.2 film replicated the porous alumina structure resulting in nano-meshed films. Very good control of the nanomesh geometrical features (pore diameter, pitch, neck) was achieved through the alumina template, with pore diameters ranging from 294 ± 5nm down to 31 ± 4 nm. The method we developed is able to provide large areas of nano-meshes in a simple and reproducible way, being easily scalable for industrial applications. Most importantly, the thermal conductivity of the films was reduced as the diameter of the porous became smaller to values that varied from κ = 1.54 ± 0.27 W K−1m−1, down to the ultra-low κ = 0.55 ± 0.10 W K−1m−1 value. The latter is well below the amorphous limit, while the Seebeck coefficient and electrical conductivity of the material were retained. These properties, together with our large area fabrication approach, can provide an important route towards achieving high conversion efficiency, large area, and high scalable thermoelectric materials.
Publisher version (URL)https://doi.org/10.1038/srep32778
URIhttp://hdl.handle.net/10261/181544
DOI10.1038/srep32778
E-ISSN2045-2322
Appears in Collections:(IMN-CNM) Artículos
Files in This Item:
File Description SizeFormat 
Ultra-low thermal conductivities_PerezTaborda.pdf1,15 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.