Langmuir and Langmuir–Blodgett films of low-bandgap polymers

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dc.contributor.authorBraunger, Maria L [UNESP]
dc.contributor.authorda Silva, Edilene Assunção [UNESP]
dc.contributor.authorAwada, Hussein
dc.contributor.authorde Oliveira, Vinícius JR [UNESP]
dc.contributor.authorSilva, Hugo Santos
dc.contributor.authorBégué, Didier
dc.contributor.authorHiorns, Roger C
dc.contributor.authorLartigau-Dagron, Christine
dc.contributor.authorde Almeida Olivati, Clarissa [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUMR 5254
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.date.accessioned2018-12-11T17:21:37Z
dc.date.available2018-12-11T17:21:37Z
dc.date.issued2018-08-01
dc.description.abstractLow-bandgap conjugated polymers have provided a considerable increase in organic photovoltaic efficiencies, however, an understanding of class-specific nanostructures, necessary to further improve device qualities, remains scarce. Their self-assembly and associated electronic behaviors in Langmuir−Blodgett (LB) films are used here to provide relationships specific to each polymer, clarifying their structure−property characteristics. The behavior of two low-bandgap polymers based on cyclopentadithiophene (PCPDTBT) and dithienosilole (Si-PCPDTBT) units in the Langmuir trough were investigated and it is shown that it is possible to fabricate nanostructured films of low-bandgap polymers on solid substrates with the LB deposition technique. The polymers were mixed with amphiphilic molecules at well-defined concentrations to improve the formation of the LB films. The polymers were also deposited by drop-casting and LB techniques onto interdigitated electrodes to evaluate their electrical properties, and the LB films were characterized for their optical and morphological properties. It was found that both LB and drop-cast films of PCPDTBT showed higher electrical conductivities than those of Si-PCPDTBT. Importantly, LB films resulted in higher electrical conductivities – by an order of magnitude − compared to their equivalent mixtures with stearic acid in drop-cast films, although drop-cast films without stearic acid gave higher conductivities. This fine-tuning of the molecular architectures of the films is thus demonstrated to directly affect the physical properties and may lead to an improvement in device efficiencies in future applications. © 2018 Society of Chemical Industry.en
dc.description.affiliationDepartamento de Física Faculdade de Ciências e Tecnologia UNESP Rua Roberto Simonsen 305
dc.description.affiliationCNRS/Univ Pau & Pays Adour Institut des Science Analytiques et Physico-Chimie pour l'Environnement et les Materiaux UMR 5254
dc.description.affiliationDepartment of Applied Physics ‘Gleb Wataghin’ Institute of Physics University of Campinas − Unicamp, Rua Sérgio Buarque de Holanda 777
dc.description.affiliationUnespDepartamento de Física Faculdade de Ciências e Tecnologia UNESP Rua Roberto Simonsen 305
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipInstituto Nacional de Ciência e Tecnologia em Eletrônica Orgânica
dc.description.sponsorshipIdFAPESP: 2010/20094-1
dc.format.extent1028-1034
dc.identifierhttp://dx.doi.org/10.1002/pi.5604
dc.identifier.citationPolymer International, v. 67, n. 8, p. 1028-1034, 2018.
dc.identifier.doi10.1002/pi.5604
dc.identifier.issn1097-0126
dc.identifier.issn0959-8103
dc.identifier.lattes9822212808651415
dc.identifier.orcid0000-0002-0114-6795
dc.identifier.scopus2-s2.0-85049848905
dc.identifier.urihttp://hdl.handle.net/11449/176590
dc.language.isoeng
dc.relation.ispartofPolymer International
dc.relation.ispartofsjr0,680
dc.relation.ispartofsjr0,680
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectelectrical conductivity
dc.subjectLangmuir film
dc.subjectLangmuir−Blodgett
dc.subjectlow-bandgap polymer
dc.titleLangmuir and Langmuir–Blodgett films of low-bandgap polymersen
dc.typeArtigo
unesp.author.lattes9822212808651415[9]
unesp.author.orcid0000-0002-6794-5362[1]
unesp.author.orcid0000-0002-9887-5280[7]
unesp.author.orcid0000-0002-0114-6795[9]

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