Direct visualization of the charge transfer state dynamics in dilute-donor organic photovoltaic blends

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Autor(es): dc.contributorUniversity of Bern-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorTechnische Universität-
Autor(es): dc.contributorUniversity of Oxford-
Autor(es): dc.contributorTechnische Universität München-
Autor(es): dc.creatorMoore, Gareth John-
Autor(es): dc.creatorGünther, Florian-
Autor(es): dc.creatorYallum, Kaila M.-
Autor(es): dc.creatorCausa’, Martina-
Autor(es): dc.creatorJungbluth, Anna-
Autor(es): dc.creatorRéhault, Julien-
Autor(es): dc.creatorRiede, Moritz-
Autor(es): dc.creatorOrtmann, Frank-
Autor(es): dc.creatorBanerji, Natalie-
Data de aceite: dc.date.accessioned2025-08-21T22:29:01Z-
Data de disponibilização: dc.date.available2025-08-21T22:29:01Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-11-30-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1038/s41467-024-53694-4-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/298560-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/298560-
Descrição: dc.descriptionThe interconversion dynamics between charge transfer state charges (CTCs) and separated charges (SCs) is still an unresolved issue in the field of organic photovoltaics. Here, a transient absorption spectroscopy (TAS) study of a thermally evaporated small-molecule:fullerene system (α6T:C60) in different morphologies (dilute intermixed and phase separated) is presented. Spectral decomposition reveals two charge species with distinct absorption characteristics and different dynamics. Using time-dependent density functional theory, these species are identified as CTCs and SCs, where the spectral differences arise from broken symmetry in the charge transfer state that turns forbidden transitions into allowed ones. Based on this assignment, a kinetic model is formulated allowing the characterization of the charge generation, separation, and recombination mechanisms. We find that SCs are either formed directly from excitons within a few picoseconds or more slowly (~30–80 ps) from reversible splitting of CTCs. These findings constitute the first unambiguous observation of spectrally resolved CTCs and SCs.-
Descrição: dc.descriptionDepartment of Chemistry Biochemistry and Pharmaceutical Sciences University of Bern-
Descrição: dc.descriptionInstituto de Física de São Carlos (IFSC) Universidade de São Paulo (USP)-
Descrição: dc.descriptionInstituto de Geociências e Ciências Exatas (IGCE) São Paulo State University (UNESP)-
Descrição: dc.descriptionCenter for Advancing Electronics Dresden Technische Universität-
Descrição: dc.descriptionClarendon Laboratory Department of Physics University of Oxford-
Descrição: dc.descriptionDepartment of Chemistry TUM School of Natural Sciences Technische Universität München, München-
Descrição: dc.descriptionInstituto de Geociências e Ciências Exatas (IGCE) São Paulo State University (UNESP)-
Idioma: dc.languageen-
Relação: dc.relationNature Communications-
???dc.source???: dc.sourceScopus-
Título: dc.titleDirect visualization of the charge transfer state dynamics in dilute-donor organic photovoltaic blends-
Tipo de arquivo: dc.typelivro digital-
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