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FD 176: Bridging Silicon Nanoparticles and Thermoelectrics: Phenylacetylene Functionalization

Ashby, Shane, Thomas, Jason A., Garcia Canadas, Jorge, Gao, Min, Corps, Jack, Powell, Anthony V., Xu, Hualong, Shen, Wei and Chao, Yimin 2014. FD 176: Bridging Silicon Nanoparticles and Thermoelectrics: Phenylacetylene Functionalization. Faraday Discussions 176 , pp. 349-361. 10.1039/c4fd00109e

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Abstract

Silicon is a promising alternative to current thermoelectric materials (Bi2Te3). Silicon nanoparticle based materials show especially low thermal conductivities due to the high number of interfaces, which increases the observed phonon scattering. The major obstacle with these materials is maintaining a high electrical conductivity. Surface functionalization with phenylacetylene shows an electrical conductivity of 18.1 S m-1 and seebeck coefficient of 3228.8 μV K-1 as well as main-taining a thermal conductivity of 0.1 W K-1 m-1. This gives a ZT of 0.6 at 300 K which is significant for a bulk silicon based material and is similar to that of other thermoelectric materials such as Mg2Si, PbTe and SiGe alloys.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Additional Information: Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/1359-6640/ (accessed 03/07/14).
Publisher: Royal Society of Chemistry
ISSN: 1359-6640
Date of First Compliant Deposit: 30 March 2016
Date of Acceptance: 26 June 2014
Last Modified: 17 Oct 2019 22:36
URI: http://orca-mwe.cf.ac.uk/id/eprint/61291

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