Identification of a positive-Seebeck-coefficient exohedral fullerene

Almutlaq, Nasser and Al-Galiby, Qusiy and Bailey, Steven William Dennis and Lambert, Colin John (2016) Identification of a positive-Seebeck-coefficient exohedral fullerene. Nanoscale, 2016 (28). pp. 13597-13602. ISSN 2040-3364

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Abstract

If fullerene-based thermoelectricity is to become a viable technology, then fullerenes exhibiting both positive and negative Seebeck coefficients are needed. C60 is known to have a negative Seebeck coefficient and therefore in this paper we address the challenge of identifying a positive-Seebeck-coefficient fullerene. We investigated the thermoelectric properties of single-molecule junctions of the exohedral fullerene C50Cl10 connected to gold electrodes and found that it indeed possesses a positive Seebeck coefficient. Furthermore, in common with C60, the Seebeck coefficient can be increased by placing more than one C50Cl10 in series. For a single C50Cl10, we find S = +8 μV K−1 and for two C50Cl10's in series we find S = +30 μV K−1. We also find that the C50Cl10 monomer and dimer have power factors of 0.5 × 10−5 W m−1 K−2 and 6.0 × 10−5 W m−1 K−2 respectively. These results demonstrate that exohedral fullerenes provide a new class of thermoelectric materials with desirable properties, which complement those of all-carbon fullerenes, thereby enabling the boosting of the thermovoltage in all-fullerene tandem structures.

Item Type: Journal Article
Journal or Publication Title: Nanoscale
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/2500
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 80280
Deposited By: ep_importer_pure
Deposited On: 01 Jul 2016 11:46
Refereed?: Yes
Published?: Published
Last Modified: 15 Sep 2019 02:12
URI: https://eprints.lancs.ac.uk/id/eprint/80280

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