Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.14279/18177
DC FieldValueLanguage
dc.contributor.authorKeivanidis, Panagiotis E.-
dc.contributor.authorHoward, Ian A.-
dc.contributor.authorFriend, Richard H.-
dc.date.accessioned2020-03-27T16:52:09Z-
dc.date.available2020-03-27T16:52:09Z-
dc.date.issued2008-10-23-
dc.identifier.citationAdvanced Functional Materials, 2008, vol. 18, iss. 20, pp. 3189-3202en_US
dc.identifier.issn1616-301X-
dc.identifier.urihttps://hdl.handle.net/20.500.14279/18177-
dc.description.abstractIn the present work, we correlate the photophysical and photovoltaic properties with the respective film morphologies of three different blends made of the fluorene copolymers poly(9,9′-dioctylfluorene-co-benzothiadiazole) (F8BT), poly[9,9′-dioctylfluorene-co-N-(4-butylphenyl)diphenylamine] (TFB), and poly[9,9′-dioctyfluorene-co-bis-N,N′-(4-butylphenyl)-bis- N,N-phenyl-1,4-phenylenediamine] (PFB) when blended with a perylene tetracarboxylic diimide (PDI) derivative. Additional photophysical studies in reference PDI blends of the electronically inert poly(styrene) matrix address the enhanced PDI intermolecular solidstate interactions. We resolve the process of resonance energy transfer from excited polymer hosts to PDI and the process of photoinduced hole transfer from PDI to the polymer hosts. We deduce the efficiency of charge-transfer PDI photoluminescence (PL) quenching and we discuss the power-law PL kinetics seen in the as-spun systems. Next we determine the dependence of the device external quantum efficiency (EQE) of these blends, in a range of annealing temperatures and PDI loadings. Differential scanning calorimetry enables precise selection of annealing temperatures. Optical microscopy shows that annealing enhances the order characteristics in the PDI aggregates in the F8BT:PDI system. In the case of the TFB:PDI and PFB.-PDI blends, AFM studies suggest the formation of PDI-rich domains on the film/air interface. The degree of order in the π-π stacking of the PDI monomers is inferred by the UV-Vis and PL spectra of the blends. The extent of order characteristics in PDI aggregates is correlated with the thermal properties of the hosts that control PDI molecular mobility upon annealing. The efficient dispersion of disrupted PDI crystallites is proposed to form appropriate percolation networks that favor balanced extraction of photogenerated carriers. © 2008 WILEY-VCH Verlag GmbH & Co. KGaA.en_US
dc.formatpdfen_US
dc.language.isoenen_US
dc.relation.ispartofAdvanced Functional Materialsen_US
dc.rights© Wileyen_US
dc.subjectPolymer blendsen_US
dc.subjectPhotovoltaic devicesen_US
dc.subjectFilmsen_US
dc.subjectCopolymersen_US
dc.titleIntermolecular interactions of perylene diimides in photovoltaic blends of fluorene copolymers: Disorder effects on photophysical properties, film morphology and device efficiencyen_US
dc.typeArticleen_US
dc.collaborationCavendish Laboratoryen_US
dc.subject.categoryMechanical Engineeringen_US
dc.journalsSubscriptionen_US
dc.countryUnited Kingdomen_US
dc.subject.fieldEngineering and Technologyen_US
dc.publicationPeer Revieweden_US
dc.identifier.doi10.1002/adfm.200800356en_US
dc.identifier.scopus2-s2.0-55349137778-
dc.identifier.urlhttps://api.elsevier.com/content/abstract/scopus_id/55349137778-
dc.relation.issue20en_US
dc.relation.volume18en_US
cut.common.academicyear2008-2009en_US
dc.identifier.spage3189en_US
dc.identifier.epage3202en_US
item.cerifentitytypePublications-
item.languageiso639-1en-
item.fulltextNo Fulltext-
item.openairecristypehttp://purl.org/coar/resource_type/c_6501-
item.openairetypearticle-
item.grantfulltextnone-
crisitem.journal.journalissn1616-3028-
crisitem.journal.publisherWiley-
crisitem.author.deptDepartment of Mechanical Engineering and Materials Science and Engineering-
crisitem.author.facultyFaculty of Engineering and Technology-
crisitem.author.orcid0000-0002-5336-249X-
crisitem.author.parentorgFaculty of Engineering and Technology-
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