Triplet-to-singlet exciton transfer in hyperfluorescent OLED materials

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorTechnical University of Denmark, Department of Energy Conversion and Storage-
Autor(es): dc.contributorUniversity of Brasilia, Institute of Physics-
Autor(es): dc.contributorUniversity of Brasilia, Institute of Physics-
Autor(es): dc.contributorUniversity of Brasilia, Institute of Physics-
Autor(es): dc.contributorUniversity of Brasilia, Institute of Physics-
Autor(es): dc.creatorSousa, Leonardo Evaristo de-
Autor(es): dc.creatorBorn, Larissa dos Santos-
Autor(es): dc.creatorOliveira Neto, Pedro Henrique de-
Autor(es): dc.creatorSilva, Piotr de-
Data de aceite: dc.date.accessioned2024-10-23T15:30:21Z-
Data de disponibilização: dc.date.available2024-10-23T15:30:21Z-
Data de envio: dc.date.issued2024-07-04-
Data de envio: dc.date.issued2024-07-04-
Data de envio: dc.date.issued2021-
Fonte completa do material: dc.identifierhttp://repositorio2.unb.br/jspui/handle/10482/48533-
Fonte completa do material: dc.identifierhttps://orcid.org/0000-0002-5880-5325-
Fonte completa do material: dc.identifierhttps://orcid.org/0000-0002-8336-7718-
Fonte completa do material: dc.identifierhttps://orcid.org/0000-0002-4985-7350-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/884794-
Descrição: dc.descriptionHyperfluorescent organic light-emitting diodes combine two kinds of dopants to maximize device efficiency: one molecule exhibiting thermally activated delayed fluorescence (TADF) and another molecule with a high fluorescence rate and narrow emission spectrum. The postulated role of a TADF sensitizer is to enable upconversion of triplet to singlet excitons through the reverse intersystem crossing mechanism, which is followed by a Fo¨rster energy transfer to the fluorescent emitter. However, a second mechanism based on the direct triplet-to-singlet exciton transfer between TADF molecules is a priori possible, but its role in hyperfluorescence has not been investigated. Here we employ first-principles electronic-structure and kinetic Monte Carlo simulations to study the hyperfluorescence mechanism in four pairs of TADF/fluorescent emitters. We demonstrate how the triplet-to-singlet energy transfer mechanism is, in some cases, the main driver for the quantum efficiency boost observed in hyperfluorescent devices.-
Descrição: dc.descriptionInstituto de Física (IF)-
Idioma: dc.languageen-
Publicador: dc.publisherRoyal Society of Chemistry-
Relação: dc.relationhttps://pubs.rsc.org/en/content/articlelanding/2022/tc/d1tc05596h-
Direitos: dc.rightsAcesso Restrito-
Palavras-chave: dc.subjectÉxcitons-
Palavras-chave: dc.subjectHiperfluorescentes-
Palavras-chave: dc.subjectDiodos emissores de luz orgânicos (OLEDs)-
Título: dc.titleTriplet-to-singlet exciton transfer in hyperfluorescent OLED materials-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional – UNB

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