Optical properties of undoped NdTaO4, ErTaO4 and YbTaO4 ceramics

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dc.creatorKisla Prislen Felix Siqueira
dc.creatorAlexandre Peixoto do Carmo
dc.creatorMaria José Valenzuela Bell
dc.creatorAnderson Dias
dc.date.accessioned2023-07-28T12:52:01Z
dc.date.accessioned2025-09-09T01:32:17Z
dc.date.available2023-07-28T12:52:01Z
dc.date.issued2016
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.identifier.doihttps://doi.org/10.1016/j.jlumin.2016.06.054
dc.identifier.issn1872-7883
dc.identifier.urihttps://hdl.handle.net/1843/57125
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofJournal of Luminescence
dc.rightsAcesso Restrito
dc.subjectLuminescência
dc.subjectLasers de estado sólido
dc.subjectIons das terras raras
dc.subjectEspectroscopia de infravermelho
dc.subjectRaios X - Difração
dc.subjectMaterial cerâmico
dc.subject.otherOrthotantalates
dc.subject.otherLuminescence
dc.subject.otherCrystal structures
dc.subject.otherSolid state lasers
dc.subject.otherRare earth
dc.titleOptical properties of undoped NdTaO4, ErTaO4 and YbTaO4 ceramics
dc.typeArtigo de periódico
local.citation.epage153
local.citation.spage146
local.citation.volume179
local.description.resumoThe optical properties of undoped polycrystalline ceramics NdTaO4 (NTO), ErTaO4 (ETO) and YbTaO4 (YTO) were investigated for the first time to our knowledge. The ceramics were prepared by solid-state reaction and exhibited two different crystalline structures, according to x-ray diffraction: M-fergusonite type (I2/a, #15), for NTO, and M′-fergusonite type (P2/a, #13), for ETO and YTO. The results from photoluminescence (PL) absorption and emission showed that the optical properties of these compounds have some variation in accordance with the rare earth ion present on the TaO4 host matrix. In these ceramics, the intraconfigurational f–f transitions were observed. The specific emissions in the infrared (IR) regions were assigned to all ceramics, as well as emission in the visible range for ETO. Under near-IR excitation (at 980 nm), the ETO ceramic is characterized by intense purplish pink up-conversion luminescence with coordinates x=0.460 and y=0.271 in the chromaticity diagram (CIE), and about 47% of color purity. Under visible excitation at 532 nm, clear evidences of the down-conversion process in ETO through the cross-relaxation have been found. Fluorescence lifetimes for dominated IR-emission were determined as 81.5, 122.1 and 131.2 μs for NTO, YTO and ETO, respectively. The broad full width at half-maximum (FWHM) and optical results indicate that the polycrystalline ceramics NTO, ETO and YTO investigated here are promising luminescent inorganic materials for solid state lasers.
local.identifier.orcidhttps://orcid.org/0000-0001-7413-1087
local.identifier.orcidhttps://orcid.org/0000-0002-6344-3103
local.identifier.orcidhttps://orcid.org/0000-0003-2494-8878
local.identifier.orcidhttps://orcid.org/0000-0001-7038-4570
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S0022231316306263

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