Enhanced thermoelectricity in metal−[60]fullerene−graphene molecular junctions

Autor: Simon A., Svatek, Valentina, Sacchetti, Laura, Rodríguez-Pérez, Beatriz M., Illescas, Laura, Rincón-García, Gabino, Rubio-Bollinger, M. Teresa, González, Steven, Bailey, Colin J., Lambert, Nazario, Martín, Agrait de la Puente, Mario Nicolás
Přispěvatelé: UAM. Departamento de Física de la Materia Condensada
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Popis: 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 meta-connected phenyl rings, two para-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-C60-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
This work has been supported by the European Commission through FP7 ITN MOLESCO (Project Number 606728), the (MAD2D-CM)-UCM1-MRR project and through the EC H2020 FET Open Project Grant Agreement Number 767187 “QuIET”. The authors acknowledge support from the Spanish Ministry of Science and Innovation MCIN (Projects PID2020-114653RB-I00, PID2020-115120GB-I00, Centro de Excelencia Severo Ochoa SEV-2016-0686). L.R.-G. acknowledges support from Spanish MECD (Grant No. FPU14/03368) and, with N.A., funding from the Education and Research Council of the Comunidad de Madrid and the European Social Fund (ref. PEJD-2019-POST/IND-16353)
Databáze: OpenAIRE
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