Reduction of the Lattice Thermal Conductivity of Polymer Semiconductors by Molecular Doping

Here we show that molecular doping of polymer thermoelectrics increases the electrical conductivity while reducing the thermal conductivity. A high-throughput methodology based on annealing and doping gradients within individual films is employed to self-consistently analyze and correlate electrical...

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Autores: Zapata Arteaga, Osnat, Perevedentsev, Aleksandr, Marina, Sara, Martín, Jaime, Reparaz, J. S., Campoy Quiles, Mariano
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/219583
Acceso en línea:http://hdl.handle.net/10261/219583
Access Level:acceso abierto
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spelling Reduction of the Lattice Thermal Conductivity of Polymer Semiconductors by Molecular DopingZapata Arteaga, OsnatPerevedentsev, AleksandrMarina, SaraMartín, JaimeReparaz, J. S.Campoy Quiles, MarianoHere we show that molecular doping of polymer thermoelectrics increases the electrical conductivity while reducing the thermal conductivity. A high-throughput methodology based on annealing and doping gradients within individual films is employed to self-consistently analyze and correlate electrical and thermal characteristics for the equivalent of >100 samples. We focus on the benchmark material system poly(2,5- bis(3-alkylthiophen-2-yl)thieno[3,2-b]thiophene) (PBTTT) doped with molecular acceptor 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ). The thermal conductivity of neat PBTTT films is dominated by the degree of crystallinity, with thermal percolation observed for annealing temperatures >170 °C. Upon doping the samples with a relatively low amount of F4TCNQ (anion content <1 mol %), the thermal conductivity exhibits a two-fold reduction without compromising the crystalline quality, which resembles the effect of alloy scattering observed in several inorganic systems. The analysis of the relation between thermal and electrical conductivities shows that thermal transport is dominated by a doping-induced reduced lattice contribution.We acknowledge financial support from the Spanish Ministry of Science and Innovation through projects PGC2018-095411- B-I00 and MAT2017-90024-P (TANGENTS)-EI/FEDER, UE projects; the Generalitat de Catalunya through grants 2017SGR488 and AGAUR 2018 PROD 00191; and from the European Research Council (ERC) under grant agreement no. 648901. O.Z.-A. acknowledges CONACYT-SENER for his Ph.D. scholarship (no. 472571). J.M. thanks MCIU for the Ramon y Cajal contract and grant PGC2018-094620-A-I00. ́ We thank Dr. Agusti ́ n Mihi for the access to and support with the FTIR equipment. We acknowledge the technical and human support provided by SGIker of UPV/EHU and European funding (ERDF and ESF). We thank Andreś Gomez Rodri ́ ́ guez from the Scanning Probe Microscopy Laboratory (ICMAB-CSIC) for a set of AFM measurements. We acknowledge support of the publication fee by the CSIC Open Access Publication Support Initiative through its Unit of Information Resources for Research (URICI).Peer reviewedAmerican Chemical SocietyMinisterio de Ciencia, Innovación y Universidades (España)European CommissionGeneralitat de CatalunyaEuropean Research CouncilCSIC - Unidad de Recursos de Información Científica para la Investigación (URICI)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202020202020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/219583reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-095411- B-I00info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/MAT2017-90024-Pinfo:eu-repo/grantAgreement/EC/H2020/648901info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-094620-A-I00info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2015-0496http://dx.doi.org/10.1021/acsenergylett.0c01410Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2195832026-05-22T06:33:51Z
dc.title.none.fl_str_mv Reduction of the Lattice Thermal Conductivity of Polymer Semiconductors by Molecular Doping
title Reduction of the Lattice Thermal Conductivity of Polymer Semiconductors by Molecular Doping
spellingShingle Reduction of the Lattice Thermal Conductivity of Polymer Semiconductors by Molecular Doping
Zapata Arteaga, Osnat
title_short Reduction of the Lattice Thermal Conductivity of Polymer Semiconductors by Molecular Doping
title_full Reduction of the Lattice Thermal Conductivity of Polymer Semiconductors by Molecular Doping
title_fullStr Reduction of the Lattice Thermal Conductivity of Polymer Semiconductors by Molecular Doping
title_full_unstemmed Reduction of the Lattice Thermal Conductivity of Polymer Semiconductors by Molecular Doping
title_sort Reduction of the Lattice Thermal Conductivity of Polymer Semiconductors by Molecular Doping
dc.creator.none.fl_str_mv Zapata Arteaga, Osnat
Perevedentsev, Aleksandr
Marina, Sara
Martín, Jaime
Reparaz, J. S.
Campoy Quiles, Mariano
author Zapata Arteaga, Osnat
author_facet Zapata Arteaga, Osnat
Perevedentsev, Aleksandr
Marina, Sara
Martín, Jaime
Reparaz, J. S.
Campoy Quiles, Mariano
author_role author
author2 Perevedentsev, Aleksandr
Marina, Sara
Martín, Jaime
Reparaz, J. S.
Campoy Quiles, Mariano
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia, Innovación y Universidades (España)
European Commission
Generalitat de Catalunya
European Research Council
CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description Here we show that molecular doping of polymer thermoelectrics increases the electrical conductivity while reducing the thermal conductivity. A high-throughput methodology based on annealing and doping gradients within individual films is employed to self-consistently analyze and correlate electrical and thermal characteristics for the equivalent of >100 samples. We focus on the benchmark material system poly(2,5- bis(3-alkylthiophen-2-yl)thieno[3,2-b]thiophene) (PBTTT) doped with molecular acceptor 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ). The thermal conductivity of neat PBTTT films is dominated by the degree of crystallinity, with thermal percolation observed for annealing temperatures >170 °C. Upon doping the samples with a relatively low amount of F4TCNQ (anion content <1 mol %), the thermal conductivity exhibits a two-fold reduction without compromising the crystalline quality, which resembles the effect of alloy scattering observed in several inorganic systems. The analysis of the relation between thermal and electrical conductivities shows that thermal transport is dominated by a doping-induced reduced lattice contribution.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/219583
url http://hdl.handle.net/10261/219583
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
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info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-095411- B-I00
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/MAT2017-90024-P
info:eu-repo/grantAgreement/EC/H2020/648901
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-094620-A-I00
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2015-0496
http://dx.doi.org/10.1021/acsenergylett.0c01410
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
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