Thermal conductivity of benzothieno-benzothiophene derivatives at the nanoscale

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...

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Autores: Gueye, Magatte Niang|||0000-0003-4337-4179, Vercouter, Alexandre|||0000-0003-0682-0176, Jouclas, Rémy|||0000-0002-1346-6817, Guerin, David|||0000-0002-4338-1742, Lemaur, Vincent|||0000-0001-8601-286X, Schweicher, Guillaume|||0000-0002-6501-0790, Lenfant, Stephane|||0000-0002-6857-8752, Antidormi, Aleandro|||0000-0002-5266-8147, Geerts, Yves Henri|||0000-0002-2660-5767, Melis, Claudio|||0000-0002-5768-8403, Cornil, Jerome|||0000-0002-5479-4227, Vuillaume, Dominique|||0000-0002-3362-1669
Tipo de recurso: artículo
Fecha de publicación:2021
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:241023
Acceso en línea:https://ddd.uab.cat/record/241023
https://dx.doi.org/urn:doi:10.1039/d0nr08619c
Access Level:acceso abierto
Palabra clave:Anisotropy factor
Approach to equilibrium
Benzothiophene derivatives
Crystalline directions
Molecular dynamics calculation
Scanning thermal microscopy
Thermal conductance
Thickness dependence
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spelling Thermal conductivity of benzothieno-benzothiophene derivatives at the nanoscaleGueye, Magatte Niang|||0000-0003-4337-4179Vercouter, Alexandre|||0000-0003-0682-0176Jouclas, Rémy|||0000-0002-1346-6817Guerin, David|||0000-0002-4338-1742Lemaur, Vincent|||0000-0001-8601-286XSchweicher, Guillaume|||0000-0002-6501-0790Lenfant, Stephane|||0000-0002-6857-8752Antidormi, Aleandro|||0000-0002-5266-8147Geerts, Yves Henri|||0000-0002-2660-5767Melis, Claudio|||0000-0002-5768-8403Cornil, Jerome|||0000-0002-5479-4227Vuillaume, Dominique|||0000-0002-3362-1669Anisotropy factorApproach to equilibriumBenzothiophene derivativesCrystalline directionsMolecular dynamics calculationScanning thermal microscopyThermal conductanceThickness dependenceWe 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-1versus 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. 22021-01-0120212021-01-01Articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/241023https://dx.doi.org/urn:doi:10.1039/d0nr08619creponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengopen accesshttp://purl.org/coar/access_right/c_abf2Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.https://rightsstatements.org/vocab/InC/1.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:2410232026-06-06T12:50:31Z
dc.title.none.fl_str_mv Thermal conductivity of benzothieno-benzothiophene derivatives at the nanoscale
title Thermal conductivity of benzothieno-benzothiophene derivatives at the nanoscale
spellingShingle Thermal conductivity of benzothieno-benzothiophene derivatives at the nanoscale
Gueye, Magatte Niang|||0000-0003-4337-4179
Anisotropy factor
Approach to equilibrium
Benzothiophene derivatives
Crystalline directions
Molecular dynamics calculation
Scanning thermal microscopy
Thermal conductance
Thickness dependence
title_short Thermal conductivity of benzothieno-benzothiophene derivatives at the nanoscale
title_full Thermal conductivity of benzothieno-benzothiophene derivatives at the nanoscale
title_fullStr Thermal conductivity of benzothieno-benzothiophene derivatives at the nanoscale
title_full_unstemmed Thermal conductivity of benzothieno-benzothiophene derivatives at the nanoscale
title_sort Thermal conductivity of benzothieno-benzothiophene derivatives at the nanoscale
dc.creator.none.fl_str_mv Gueye, Magatte Niang|||0000-0003-4337-4179
Vercouter, Alexandre|||0000-0003-0682-0176
Jouclas, Rémy|||0000-0002-1346-6817
Guerin, David|||0000-0002-4338-1742
Lemaur, Vincent|||0000-0001-8601-286X
Schweicher, Guillaume|||0000-0002-6501-0790
Lenfant, Stephane|||0000-0002-6857-8752
Antidormi, Aleandro|||0000-0002-5266-8147
Geerts, Yves Henri|||0000-0002-2660-5767
Melis, Claudio|||0000-0002-5768-8403
Cornil, Jerome|||0000-0002-5479-4227
Vuillaume, Dominique|||0000-0002-3362-1669
author Gueye, Magatte Niang|||0000-0003-4337-4179
author_facet Gueye, Magatte Niang|||0000-0003-4337-4179
Vercouter, Alexandre|||0000-0003-0682-0176
Jouclas, Rémy|||0000-0002-1346-6817
Guerin, David|||0000-0002-4338-1742
Lemaur, Vincent|||0000-0001-8601-286X
Schweicher, Guillaume|||0000-0002-6501-0790
Lenfant, Stephane|||0000-0002-6857-8752
Antidormi, Aleandro|||0000-0002-5266-8147
Geerts, Yves Henri|||0000-0002-2660-5767
Melis, Claudio|||0000-0002-5768-8403
Cornil, Jerome|||0000-0002-5479-4227
Vuillaume, Dominique|||0000-0002-3362-1669
author_role author
author2 Vercouter, Alexandre|||0000-0003-0682-0176
Jouclas, Rémy|||0000-0002-1346-6817
Guerin, David|||0000-0002-4338-1742
Lemaur, Vincent|||0000-0001-8601-286X
Schweicher, Guillaume|||0000-0002-6501-0790
Lenfant, Stephane|||0000-0002-6857-8752
Antidormi, Aleandro|||0000-0002-5266-8147
Geerts, Yves Henri|||0000-0002-2660-5767
Melis, Claudio|||0000-0002-5768-8403
Cornil, Jerome|||0000-0002-5479-4227
Vuillaume, Dominique|||0000-0002-3362-1669
author2_role author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Anisotropy factor
Approach to equilibrium
Benzothiophene derivatives
Crystalline directions
Molecular dynamics calculation
Scanning thermal microscopy
Thermal conductance
Thickness dependence
topic Anisotropy factor
Approach to equilibrium
Benzothiophene derivatives
Crystalline directions
Molecular dynamics calculation
Scanning thermal microscopy
Thermal conductance
Thickness dependence
description 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-1versus 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.
publishDate 2021
dc.date.none.fl_str_mv 2
2021-01-01
2021
2021-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/241023
https://dx.doi.org/urn:doi:10.1039/d0nr08619c
url https://ddd.uab.cat/record/241023
https://dx.doi.org/urn:doi:10.1039/d0nr08619c
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://rightsstatements.org/vocab/InC/1.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://rightsstatements.org/vocab/InC/1.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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