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Dislocation loops as a mechanism for thermoelectric power factor enhancement in silicon nano-layers
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Bennett, Nick S., Byrne, Daragh, Cowley, Aidan and Neophytou, Neophytos (2016) Dislocation loops as a mechanism for thermoelectric power factor enhancement in silicon nano-layers. Applied Physics Letters, 109 (17). 173905. doi:10.1063/1.4966686 ISSN 0003-6951.
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Official URL: http://dx.doi.org/10.1063/1.4966686
Abstract
A more than 70% enhancement in the thermoelectric power factor of single-crystal silicon is demonstrated in silicon nano-films, a consequence of the introduction of networks of dislocation loops and extended crystallographic defects. Despite these defects causing reductions in electrical conductivity, carrier concentration, and carrier mobility, large corresponding increases in the Seebeck coefficient and reductions in thermal conductivity lead to a significant net enhancement in thermoelectric performance. Crystal damage is deliberately introduced in a sub-surface nano-layer within a silicon substrate, demonstrating the possibility to tune the thermoelectric properties at the nano-scale within such wafers in a repeatable, large-scale, and cost-effective way.
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||
| Library of Congress Subject Headings (LCSH): | Silicon -- Electric properties, Thermoelectricity | ||||||||
| Journal or Publication Title: | Applied Physics Letters | ||||||||
| Publisher: | American Institute of Physics | ||||||||
| ISSN: | 0003-6951 | ||||||||
| Official Date: | 27 October 2016 | ||||||||
| Dates: |
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| Volume: | 109 | ||||||||
| Number: | 17 | ||||||||
| Article Number: | 173905 | ||||||||
| DOI: | 10.1063/1.4966686 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Date of first compliant deposit: | 28 October 2016 | ||||||||
| Date of first compliant Open Access: | 31 October 2016 | ||||||||
| Funder: | Science Foundation Ireland (SFI), Royal Society (Great Britain), European Research Council (ERC) | ||||||||
| Grant number: | Grant No. 12/TIDA/E2378 (SFI), Grant No. IE131212 (Royal Society), Grant No. 678763 (ERC) |
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