Thermoelectric performance of a single-layer graphene sheet for energy harvesting

Verma, Rekha and Bhattacharya, Sitangshu and Mahapatra, Santanu (2013) Thermoelectric performance of a single-layer graphene sheet for energy harvesting. In: IEEE Transactions on Electron Devices, 60 (6). pp. 2064-2070.

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Abstract

We investigate the thermoelectric (TE) figure-of-merit of a single-layer graphene (SLG) sheet by a physics-based analytical technique. We first develop analytical models of electrical and thermal resistances and the Seebeck coefficient of SLG by considering electron interactions with the in-plane and flexural phonons. Using those models, we show that both the figure-of-merit and the TE efficiency can be substantially increased with the addition of isotope doping as it significantly reduces the phonon-dominated thermal conductivity. In addition, we report that the TE open circuit output voltage and output power depends weakly on the SLG sheet dimensions and sheet concentration in the strongly diffusive regime. Proposed models agree well with the available experimental data and demonstrate the immense potential of graphene for waste-heat recovery application.

Item Type:	Journal Article
Publication:	IEEE Transactions on Electron Devices
Publisher:	IEEE-Inst Electrical Electronics Engineers Inc
Additional Information:	Copyright of this article belongs to IEEE-Inst Electrical Electronics Engineers Inc.
Keywords:	Energy Harvesting; Graphene; Phonons; Seebeck Coefficient; Thermal Conductivity; Thermoelectric Figure of Merit
Department/Centre:	Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited:	05 Jul 2013 05:28
Last Modified:	05 Jul 2013 05:28
URI:	http://eprints.iisc.ac.in/id/eprint/46781

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