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dc.contributor.authorHu, Hanlin
dc.contributor.authorZhao, Kui
dc.contributor.authorFernandes, Nikhil J.
dc.contributor.authorBoufflet, Pierre
dc.contributor.authorBannock, James Henry
dc.contributor.authorYu, Liyang
dc.contributor.authorde Mello, John C
dc.contributor.authorStingelin, Natalie
dc.contributor.authorHeeney, Martin
dc.contributor.authorGiannelis, Emmanuel P.
dc.contributor.authorAmassian, Aram
dc.date.accessioned2015-12-21T06:06:18Z
dc.date.available2015-06-23T12:55:22Z
dc.date.available2015-12-21T06:06:18Z
dc.date.issued2015
dc.identifier.citationEntanglements in Marginal Solutions: A Means of Tuning Pre-Aggregation of Conjugated Polymers with Positive Implications for Charge Transport 2015 J. Mater. Chem. C
dc.identifier.issn2050-7526
dc.identifier.issn2050-7534
dc.identifier.doi10.1039/C5TC01425E
dc.identifier.urihttp://hdl.handle.net/10754/558433
dc.description.abstractThe solution-processing of conjugated polymers, just like commodity polymers, is subject to solvent and molecular weight-dependent solubility, interactions and chain entanglements within the polymer, all of which can influence the crystallization and microstructure development in semi-crystalline polymers and consequently affect charge transport and optoelectronic properties. Disentanglement of polymer chains in marginal solvents was reported to work via ultrasonication, facilitating the formation of photophysically ordered polymer aggregates. In this contribution, we explore how a wide range of technologically relevant solvents and formulations commonly used in organic electronics influence chain entanglement and the aggregation behaviour of P3HT using a combination of rheological and spectrophotometric measurements. The specific viscosity of the solution offers an excellent indication of the degree of entanglements in the solution, which is found to be related to the solubility of P3HT in a given solvent. Moreover, deliberately disentangling the solution in the presence of solvophobic driving forces, leads consistently to formation of photophysically visible aggregates which is indicative of local and perhaps long range order in the solute. We show for a broad range of solvents and molecular weights that disentanglement ultimately leads to significant ordering of the polymer in the solid state and a commensurate increase in charge transport properties. In doing so we demonstrate a remarkable ability to tune the microstructure which has important implications for transport properties. We discuss its potential implications in the context of organic photovoltaics.
dc.publisherRoyal Society of Chemistry (RSC)
dc.relation.urlhttp://pubs.rsc.org/en/Content/ArticleLanding/2015/TC/C5TC01425E
dc.rightsThis article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.
dc.titleEntanglements in Marginal Solutions: A Means of Tuning Pre-Aggregation of Conjugated Polymers with Positive Implications for Charge Transport
dc.typeArticle
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentOrganic Electronics and Photovoltaics Group
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalJ. Mater. Chem. C
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionSchool of Applied Engineering and Physics, Cornell University, Ithaca, New York 14853, USA
dc.contributor.institutionDepartment of Chemistry and Centre for Plastic Electronics, Imp erial College London, London SW7 2AY, UK
dc.contributor.institutionDepartment of Materials and Centre for Plastic Electronics, Imp erial College London, London SW7 2AY, UK
kaust.personAmassian, Aram
kaust.personHu, Hanlin
kaust.personZhao, Kui
kaust.personYu, Liyang
refterms.dateFOA2018-06-14T09:25:18Z


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