Correlation between the PL and EL emissions of polyfluorene-based diodes using bilayers or polymer blends

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dc.citation.volume233
dc.contributor.authorde Azevedo, Diego
dc.contributor.authorFreitas, Jilian Nei
dc.contributor.authorDomingues, Raquel Aparecida [UNIFESP]
dc.contributor.authorFaleiros, Marcelo Meira
dc.contributor.authorAtvars, Teresa Dib Zambon
dc.coverageLausanne
dc.date.accessioned2020-09-01T13:21:27Z
dc.date.available2020-09-01T13:21:27Z
dc.date.issued2017
dc.description.abstractThe electroluminescent (EL) properties of two polyfluorene-based (poly(9,9-di-n-octylfluorenyl-2,7-diyl) (PFO) and poly[(9,9-di-n-octylfluorenyl-2,7-diyl)-alt-(benzo[2,1,3]thiadiazol-4,8-diyl)] (F8BT)) organic light-emitting diodes (OLEDs) were investigated. Two diode configurations were tested: blends with emissive layers of PFO (higher weight percentage, from 98 to 99.8 wt.%) and F8BT (lower weight percentage, from 0.2 to 2 wt.%) and bilayers of PFO/F8BT. To understand the diode performances, we compared the photoluminescence (PL) and the EL emissions of both configurations. PL emission decays showed that the fluorescence resonant energy transfer (FRET) efficiency is higher for blends that have less of the F8BT component than in bilayers. For the bilayer systems, however, the FRET efficiency is approximately 50%, confirming the significant inter-penetration of these two polymers. Upon decreasing the F8BT concentration in the blend or the F8BT film thickness in the bilayer, the EL emission shifted toward the blue color due to a more significant contribution from the PFO emission. The EL color can be tuned between green (from the F8BT) and blue (from the PFO) shades by adjusting the polymer composition. The differences between the PL and EL band profiles were discussed.en
dc.description.affiliationUniv Estadual Campinas, UNICAMP, Chem Inst, POB 6154, BR-13084971 Campinas, SP, Brazil
dc.description.affiliationCtr Informat Technol Renato Archer CTI, Rodovia D Pedro 1,Km 143,6, BR-13069901 Campinas, SP, Brazil
dc.description.affiliationUniv Fed Sao Paulo, Inst Ciencia & Tecnol, Campus Sao Jose dos Campos,R Talim 330, BR-12231280 Sao Jose Dos Campos, SP, Brazil
dc.description.affiliationUnifespUniv Fed Sao Paulo, Inst Ciencia & Tecnol, Campus Sao Jose dos Campos,R Talim 330, BR-12231280 Sao Jose Dos Campos, SP, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipFAPESP
dc.description.sponsorshipCNPq
dc.description.sponsorshipNational Institute of Organic Electronics (INEO) (MCT/CNPq/FAPESP)
dc.description.sponsorshipCTI
dc.description.sponsorshipUNICAMP/FAEPEX
dc.description.sponsorshipIDFAPESP: 2013/16245-2
dc.format.extent28-34
dc.identifierhttp://dx.doi.org/10.1016/j.synthmet.2017.08.015
dc.identifier.citationSynthetic Metals. Lausanne, v. 233, p. 28-34, 2017.
dc.identifier.doi10.1016/j.synthmet.2017.08.015
dc.identifier.issn0379-6779
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/58268
dc.identifier.wosWOS:000414880100004
dc.language.isoeng
dc.publisherElsevier Science Sa
dc.relation.ispartofSynthetic Metals
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectPhotoluminescenceen
dc.subjectElectroluminescenceen
dc.subjectPolyfluoreneen
dc.subjectBilayersen
dc.subjectPolymer blendsen
dc.subjectPolymer diodesen
dc.titleCorrelation between the PL and EL emissions of polyfluorene-based diodes using bilayers or polymer blendsen
dc.typeinfo:eu-repo/semantics/article
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