Phase-sensitive radioluminescence and photoluminescence features in Tm3+-doped yttrium tantalates for cyan and white light generation

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Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorLabaki, Hayra do Prado-
Autor(es): dc.creatorCaixeta, Fábio José-
Autor(es): dc.creatorMarques, Natasha Policei-
Autor(es): dc.creatorJosé Guidelli, Éder-
Autor(es): dc.creatorRocha Gonçalves, Rogéria-
Data de aceite: dc.date.accessioned2025-08-21T22:14:14Z-
Data de disponibilização: dc.date.available2025-08-21T22:14:14Z-
Data de envio: dc.date.issued2023-03-01-
Data de envio: dc.date.issued2023-03-01-
Data de envio: dc.date.issued2022-06-24-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1039/d2dt01455f-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/241323-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/241323-
Descrição: dc.descriptionRadioluminescence and visible photoluminescence tunability features from a single Tm3+-doped yttrium tantalate phosphor prepared by a soft sol-gel method designed to afford cubic Y3TaO7 and monoclinic M′-YTaO4 crystalline phases are reported. The annealing temperature influenced the crystallization kinetics and stabilized a preferential phase. To investigate how the crystalline phase affected the Tm3+ optical properties, excitation and emission spectra in the visible range were recorded for the samples annealed at 900 or 1100 °C. Inhomogeneous broadening in the emission spectra was due to the structural disorder of the Y3TaO7 phase. Energy transfer between the yttrium tantalate host and Tm3+ ions was observed upon CT band excitation. Under UV light, an intense and tunable cyan to blue emission ascribed to both the Tm3+ transitions 1D2 → 3F4 and 1G4 → 3H6 also emerged and could be observed by the naked eye. The lifetime decay curves demonstrated the occupation of distinct sites and that the symmetry sites occupied by Tm3+ ions in the Y3TaO7 host have higher lifetime values than in the M′-YTaO4 phase. A radioluminescence study was carried out to evaluate the yttrium tantalate scintillation performance, which was considerably enhanced in the presence of the M′-YTaO4 phase. Intense white light emission displaying a large color correlated temperature range could be obtained by controlling the delay time for the time-resolved measurements and upon an orange-emitting phosphor addition. All the above-mentioned structural and photoluminescence properties make these Tm3+-doped yttrium tantalates potential candidates for photonic applications, particularly integrated w-LED systems.-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionLaboratório de Materiais Luminescentes Micro e Nanoestruturados - Mater Lumen Departamento de Química FFCLRP Universidade de São Paulo, SP-
Descrição: dc.descriptionDepartment of Analytical Physical and Inorganic Chemistry Institute of Chemistry São Paulo State University (UNESP), SP-
Descrição: dc.descriptionLaboratório de Nanotecnologia e Dosimetria de Radiações - NanoDose Departamento de Física FFCLRP Universidade de São Paulo, SP-
Descrição: dc.descriptionDepartment of Analytical Physical and Inorganic Chemistry Institute of Chemistry São Paulo State University (UNESP), SP-
Formato: dc.format11108-11124-
Idioma: dc.languageen-
Relação: dc.relationDalton Transactions-
???dc.source???: dc.sourceScopus-
Título: dc.titlePhase-sensitive radioluminescence and photoluminescence features in Tm3+-doped yttrium tantalates for cyan and white light generation-
Tipo de arquivo: dc.typelivro digital-
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