Thermal conductivity of benzothieno-benzothiophene derivatives at the nanoscale
Magatte Gueye
(1)
,
Alexandre Vercouter
(2)
,
Rémy Jouclas
(3)
,
David Guérin
(1, 4)
,
Vincent Lemaur
(2)
,
Guillaume Schweicher
(3)
,
Stéphane Lenfant
(1, 5)
,
Aleandro Antidormi
(6)
,
Yves Geerts
(7, 3)
,
Claudio Melis
(8)
,
Jerome Cornil
(2)
,
Dominique Vuillaume
(1, 5)
1
IEMN -
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520
2 UMONS - Université de Mons / University of Mons
3 ULB - Université libre de Bruxelles
4 CMNF - IEMN - Centrale de Micro Nano Fabrication - IEMN
5 NCM - IEMN - Nanostructures, nanoComponents & Molecules - IEMN
6 ICN2 - Catalan Institute of Nanoscience and Nanotechnology
7 International Solvay Institutes for Physics and Chemistry [Brussels]
8 UniCa - Università degli Studi di Cagliari = University of Cagliari
2 UMONS - Université de Mons / University of Mons
3 ULB - Université libre de Bruxelles
4 CMNF - IEMN - Centrale de Micro Nano Fabrication - IEMN
5 NCM - IEMN - Nanostructures, nanoComponents & Molecules - IEMN
6 ICN2 - Catalan Institute of Nanoscience and Nanotechnology
7 International Solvay Institutes for Physics and Chemistry [Brussels]
8 UniCa - Università degli Studi di Cagliari = University of Cagliari
David Guérin
- Fonction : Auteur
- PersonId : 746101
- IdHAL : david-guerin
- ORCID : 0000-0002-4338-1742
Guillaume Schweicher
- Fonction : Auteur
- PersonId : 779663
- ORCID : 0000-0002-6501-0790
Stéphane Lenfant
- Fonction : Auteur
- PersonId : 738520
- IdHAL : stephane-lenfant
- ORCID : 0000-0002-6857-8752
- IdRef : 059841265
Dominique Vuillaume
- Fonction : Auteur
- PersonId : 746141
- IdHAL : dominique-vuillaume
- ORCID : 0000-0002-3362-1669
- IdRef : 059841451
Résumé
We study by scanning thermal microscopy the nanoscale thermal conductance of films (40-400 nm thick) of [1]benzothieno[3,2-b][1]benzothiophene (BTBT) and 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C8-BTBT-C8). We demonstrate that the out-of-plane thermal conductivity is significant along the interlayer direction, larger for BTBT (0.63 ± 0.12 W m-1 K-1) compared to C8-BTBT-C8 (0.25 ± 0.13 W m-1 K-1). These results are supported by molecular dynamics calculations (Approach to Equilibrium Molecular Dynamics method) performed on the corresponding molecular crystals. The calculations point to significant thermal conductivity (3D-like) values along the 3 crystalline directions, with anisotropy factors between the crystalline directions below 1.8 for BTBT and below 2.8 for C8-BTBT-C8, in deep contrast with the charge transport properties featuring a two-dimensional character for these materials. In agreement with the experiments, the calculations yield larger values in BTBT compared to C8-BTBT-C8 (0.6-1.3 W m-1 K-1 versus 0.3-0.7 W m-1 K-1, respectively). The weak thickness dependence of the nanoscale thermal resistance is in agreement with a simple analytical model.
Domaines
Matière Condensée [cond-mat] Science des matériaux [cond-mat.mtrl-sci] Physique [physics] Sciences de l'ingénieur [physics]Format du dépôt | Fichier |
---|---|
Type de dépôt | Article dans une revue |
Titre |
en
Thermal conductivity of benzothieno-benzothiophene derivatives at the nanoscale
|
Résumé |
en
We study by scanning thermal microscopy the nanoscale thermal conductance of films (40-400 nm thick) of [1]benzothieno[3,2-b][1]benzothiophene (BTBT) and 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C8-BTBT-C8). We demonstrate that the out-of-plane thermal conductivity is significant along the interlayer direction, larger for BTBT (0.63 ± 0.12 W m<sup>-1</sup> K<sup>-1</sup>) compared to C8-BTBT-C8 (0.25 ± 0.13 W m<sup>-1</sup> K<sup>-1</sup>). These results are supported by molecular dynamics calculations (Approach to Equilibrium Molecular Dynamics method) performed on the corresponding molecular crystals. The calculations point to significant thermal conductivity (3D-like) values along the 3 crystalline directions, with anisotropy factors between the crystalline directions below 1.8 for BTBT and below 2.8 for C8-BTBT-C8, in deep contrast with the charge transport properties featuring a two-dimensional character for these materials. In agreement with the experiments, the calculations yield larger values in BTBT compared to C8-BTBT-C8 (0.6-1.3 W m<sup>-1</sup> K<sup>-1</sup> versus 0.3-0.7 W m<sup>-1</sup> K<sup>-1</sup>, respectively). The weak thickness dependence of the nanoscale thermal resistance is in agreement with a simple analytical model.
|
Auteur(s) |
Magatte Gueye
1
, Alexandre Vercouter
2
, Rémy Jouclas
3
, David Guérin
1, 4
, Vincent Lemaur
2
, Guillaume Schweicher
3
, Stéphane Lenfant
1, 5
, Aleandro Antidormi
6
, Yves Geerts
7, 3
, Claudio Melis
8
, Jerome Cornil
2
, Dominique Vuillaume
1, 5
1
IEMN -
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520
( 1066983 )
- [Univ. Lille, CNRS, Centrale Lille Institut, Junia, Univ. Polytechnique Hauts-de-France] ––
Laboratoire Central – Cité Scientifique – Avenue Poincaré – CS 60069 – 59652 VILLENEUVE D’ASCQ CEDEX
- France
2
UMONS -
Université de Mons / University of Mons
( 160918 )
- 20, place du Parc, B7000 Mons
- Belgique
3
ULB -
Université libre de Bruxelles
( 303388 )
- Avenue Franklin Roosevelt 50 - 1050 Bruxelles
- Belgique
4
CMNF - IEMN -
Centrale de Micro Nano Fabrication - IEMN
( 1067406 )
- Groupe Centrale de Micro Nano Fabrication CMNF - IEMN UMR8520 -
Membre du réseau RENATECH des grandes centrales de Micro Nano Fabrication
- France
5
NCM - IEMN -
Nanostructures, nanoComponents & Molecules - IEMN
( 1066997 )
- groupe NCM - IEMN UMR8520
- France
6
ICN2 -
Catalan Institute of Nanoscience and Nanotechnology
( 488027 )
- Campus UAB, Bellaterra, 08193 Barcelona
- Espagne
7
International Solvay Institutes for Physics and Chemistry [Brussels]
( 209786 )
- ULB - Campus Plaine - CP 231, Bld du Triomphe, 1050 Brussels
- Belgique
8
UniCa -
Università degli Studi di Cagliari = University of Cagliari
( 204422 )
- Via Università, 40 - 09124 Cagliari
- Italie
|
Date de publication |
2021-02-14
|
Date de publication électronique |
2021-02-04
|
Volume |
13
|
Numéro |
6
|
Page/Identifiant |
3800-3807
|
Langue du document |
Anglais
|
Vulgarisation |
Non
|
Comité de lecture |
Oui
|
Audience |
Internationale
|
Nom de la revue |
|
Projet(s) ANR |
|
Domaine(s) |
|
Mots-clés |
en
thermal conducHvity, scanning thermal microscopy (SThM), approach to equilibrium molecular dynamics (AEMD), organic semiconductor, organic thermoelectricity
|
DOI | 10.1039/D0NR08619C |
Origine :
Fichiers produits par l'(les) auteur(s)
Loading...