Thermoelectric Properties of Benzothieno ...
Document type :
Compte-rendu et recension critique d'ouvrage
Title :
Thermoelectric Properties of Benzothieno-Benzothiophene Self-Assembled Monolayers in Molecular Junctions
Author(s) :
Gonzalez-Casal, Sergio [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Nanostructures, nanoComponents & Molecules - IEMN [NCM - IEMN]
Jouclas, Rémy [Auteur]
Université libre de Bruxelles [ULB]
Arbouch, Imane [Auteur]
Université de Mons / University of Mons [UMONS]
Geerts, Yves [Auteur]
Université libre de Bruxelles [ULB]
van Dyck, Colin [Auteur]
Université de Mons / University of Mons [UMONS]
Cornil, Jérôme [Auteur]
Université de Mons / University of Mons [UMONS]
Vuillaume, Dominique [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Nanostructures, nanoComponents & Molecules - IEMN [NCM - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Nanostructures, nanoComponents & Molecules - IEMN [NCM - IEMN]
Jouclas, Rémy [Auteur]
Université libre de Bruxelles [ULB]
Arbouch, Imane [Auteur]
Université de Mons / University of Mons [UMONS]
Geerts, Yves [Auteur]
Université libre de Bruxelles [ULB]
van Dyck, Colin [Auteur]
Université de Mons / University of Mons [UMONS]
Cornil, Jérôme [Auteur]
Université de Mons / University of Mons [UMONS]
Vuillaume, Dominique [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Nanostructures, nanoComponents & Molecules - IEMN [NCM - IEMN]
Journal title :
Journal of Physical Chemistry Letters
Pages :
11593-11600
Publisher :
American Chemical Society
Publication date :
2024
ISSN :
1948-7185
English keyword(s) :
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
Applied Physics (physics.app-ph)
Applied Physics (physics.app-ph)
HAL domain(s) :
Physique [physics]
Physique [physics]/Matière Condensée [cond-mat]
Physique [physics]/Matière Condensée [cond-mat]
English abstract : [en]
We report a combined experimental (C-AFM and SThM) and theoretical (DFT) study of the thermoelectric properties of molecular junctions made of self-assembled monolayers on Au of thiolated benzothieno-benzothiophene (BTBT) ...
Show more >We report a combined experimental (C-AFM and SThM) and theoretical (DFT) study of the thermoelectric properties of molecular junctions made of self-assembled monolayers on Au of thiolated benzothieno-benzothiophene (BTBT) and alkylated BTBT derivatives (C8-BTBT-C8). We measure the thermal conductance per molecule at 15 pW/K and 8.8 pW/K, respectively, among the lowest values for molecular junctions so far reported (10-50 pW/K). The lower thermal conductance for C8-BTBT-C8 is consistent with two interfacial thermal resistances introduced by the alkyl chains, which reduce the phononic thermal transport in the molecular junction. The Seebeck coefficients are 36 μV/K and 245 μV/K, respectively, the latter due to the weak coupling of the core BTBT with the electrodes. We deduce a thermoelectric figure of merit ZT up to ca. 1E-4 for the BTBT molecular junctions at 300K, on a par with the values reported for archetype molecular junctions (olygo(phenylene ethynylene) derivatives).Show less >
Show more >We report a combined experimental (C-AFM and SThM) and theoretical (DFT) study of the thermoelectric properties of molecular junctions made of self-assembled monolayers on Au of thiolated benzothieno-benzothiophene (BTBT) and alkylated BTBT derivatives (C8-BTBT-C8). We measure the thermal conductance per molecule at 15 pW/K and 8.8 pW/K, respectively, among the lowest values for molecular junctions so far reported (10-50 pW/K). The lower thermal conductance for C8-BTBT-C8 is consistent with two interfacial thermal resistances introduced by the alkyl chains, which reduce the phononic thermal transport in the molecular junction. The Seebeck coefficients are 36 μV/K and 245 μV/K, respectively, the latter due to the weak coupling of the core BTBT with the electrodes. We deduce a thermoelectric figure of merit ZT up to ca. 1E-4 for the BTBT molecular junctions at 300K, on a par with the values reported for archetype molecular junctions (olygo(phenylene ethynylene) derivatives).Show less >
Language :
Anglais
Popular science :
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