Bridging silicon nanoparticles and thermoelectrics: phenylacetylene functionalization

Ashby, Shane P., Thomas, Jason A., García-Cañadas, Jorge, Min, Gao, Corps, Jack, Powell, Anthony V., Xu, Hualong, Shen, Wei and Chao, Yimin (2014) Bridging silicon nanoparticles and thermoelectrics: phenylacetylene functionalization. Faraday Discussions, 176. pp. 349-361. ISSN 1364-5498

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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 their high number of interfaces, which increases the observed phonon scattering. The major obstacle with these materials is maintaining 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 maintaining 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
Faculty \ School: Faculty of Science > School of Chemistry
Faculty of Science > School of Chemical Sciences and Pharmacy
Depositing User: Pure Connector
Date Deposited: 08 Oct 2014 08:48
Last Modified: 28 Oct 2019 15:50
URI: https://ueaeprints.uea.ac.uk/id/eprint/50238
DOI: 10.1039/C4FD00109E

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