Enhanced Thermoelectricity in Metal–[60]Fullerene–Graphene Molecular Junctions

Svatek, Simon A. and Sacchetti, Valentina and Rodríguez-Pérez, Laura and Illescas, Beatriz M. and Rincón-García, Laura and Rubio-Bollinger, Gabino and González, M. Teresa and Bailey, Steven and Lambert, Colin J. and Martín, Nazario and Agraït, Nicolás (2023) Enhanced Thermoelectricity in Metal–[60]Fullerene–Graphene Molecular Junctions. Nano Letters, 23 (7). pp. 2726-2732. ISSN 1530-6984

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Abstract

The thermoelectric properties of molecular junctions consisting of a metal Pt electrode contacting [60]fullerene derivatives covalently bound to a graphene electrode have been studied by using a conducting-probe atomic force microscope (c-AFM). The [60]fullerene derivatives are covalently linked to the graphene via two -connected phenyl rings, two -connected phenyl rings, or a single phenyl ring. We find that the magnitude of the Seebeck coefficient is up to nine times larger than that of Au-C -Pt molecular junctions. Moreover, the sign of the thermopower can be either positive or negative depending on the details of the binding geometry and on the local value of the Fermi energy. Our results demonstrate the potential of using graphene electrodes for controlling and enhancing the thermoelectric properties of molecular junctions and confirm the outstanding performance of [60]fullerene derivatives.

Item Type:
Journal Article
Journal or Publication Title:
Nano Letters
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1500/1502
Subjects:
?? mechanical engineeringcondensed matter physicsgeneral materials sciencegeneral chemistrybioengineeringbioengineeringgeneral materials sciencegeneral chemistrymechanical engineeringcondensed matter physicsmaterials science(all)chemistry(all) ??
ID Code:
191007
Deposited By:
Deposited On:
18 Apr 2023 15:10
Refereed?:
Yes
Published?:
Published
Last Modified:
16 Jul 2024 12:02