Triplet-to-singlet exciton transfer in hyperfluorescent OLED materials

Sousa, Leonardo Evaristo de; Born, Larissa dos Santos; Oliveira Neto, Pedro Henrique de; Silva, Piotr de

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Campo DC	Valor	Idioma
dc.contributor.author	Sousa, Leonardo Evaristo de	-
dc.contributor.author	Born, Larissa dos Santos	-
dc.contributor.author	Oliveira Neto, Pedro Henrique de	-
dc.contributor.author	Silva, Piotr de	-
dc.date.accessioned	2024-07-04T15:32:57Z	-
dc.date.available	2024-07-04T15:32:57Z	-
dc.date.issued	2022	-
dc.identifier.citation	SOUSA, Leonardo Evaristo de et al. Triplet-to-singlet exciton transfer in hyperfluorescent OLED materials. Journal of Materials Chemistry C, [S. l.], n. 10, 4914, 2022. DOI: 10.1039/d1tc05596h.	pt_BR
dc.identifier.uri	http://repositorio2.unb.br/jspui/handle/10482/48533	-
dc.language.iso	eng	pt_BR
dc.publisher	Royal Society of Chemistry	pt_BR
dc.rights	Acesso Restrito	pt_BR
dc.title	Triplet-to-singlet exciton transfer in hyperfluorescent OLED materials	pt_BR
dc.type	Artigo	pt_BR
dc.subject.keyword	Éxcitons	pt_BR
dc.subject.keyword	Hiperfluorescentes	pt_BR
dc.subject.keyword	Diodos emissores de luz orgânicos (OLEDs)	pt_BR
dc.identifier.doi	10.1039/d1tc05596h	pt_BR
dc.relation.publisherversion	https://pubs.rsc.org/en/content/articlelanding/2022/tc/d1tc05596h	pt_BR
dc.description.abstract1	Hyperfluorescent 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.	pt_BR
dc.identifier.orcid	https://orcid.org/0000-0002-5880-5325	pt_BR
dc.identifier.orcid	https://orcid.org/0000-0002-8336-7718	pt_BR
dc.identifier.orcid	https://orcid.org/0000-0002-4985-7350	pt_BR
dc.contributor.affiliation	Technical University of Denmark, Department of Energy Conversion and Storage	pt_BR
dc.contributor.affiliation	University of Brasilia, Institute of Physics	pt_BR
dc.contributor.affiliation	University of Brasilia, Institute of Physics	pt_BR
dc.contributor.affiliation	University of Brasilia, Institute of Physics	pt_BR
dc.contributor.affiliation	University of Brasilia, Institute of Physics	pt_BR
dc.description.unidade	Instituto de Física (IF)	pt_BR
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