New insight on the use of diffuse reflectance spectroscopy for the optical characterization of Ln2Ge2O7 (Ln = lanthanides) pyrogermanates

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dc.creatorGuilherme Mendes Martins
dc.creatorKisla Prislen Félix Siqueira
dc.creatorCristiano Fantini Leite
dc.creatorRoberto Luiz Moreira
dc.creatorAnderson Dias
dc.date.accessioned2023-12-20T14:58:05Z
dc.date.accessioned2025-09-09T00:28:26Z
dc.date.available2023-12-20T14:58:05Z
dc.date.issued2021
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.sponsorshipFINEP - Financiadora de Estudos e Projetos, Financiadora de Estudos e Projetos
dc.description.sponsorshipOutra Agência
dc.identifier.doihttps://doi.org/10.1016/j.jlumin.2021.118312
dc.identifier.issn0022-2313
dc.identifier.urihttps://hdl.handle.net/1843/62109
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofJournal of Luminescence
dc.rightsAcesso Restrito
dc.subjectMetais de terras raras - Propriedades óticas
dc.subjectFotoluminescência
dc.subjectEspectrometria de ultra violeta
dc.subjectMaterial cerâmico
dc.subject.otherPyrogermanates
dc.subject.otherDiffuse reflectance spectroscopy
dc.subject.otherPhotoluminescence
dc.subject.otherElectronic transitions
dc.subject.otherPyrochlores
dc.subject.otherLanthanides
dc.subject.otherUV–Vis
dc.titleNew insight on the use of diffuse reflectance spectroscopy for the optical characterization of Ln2Ge2O7 (Ln = lanthanides) pyrogermanates
dc.typeArtigo de periódico
local.citation.spage118312
local.citation.volume238
local.description.resumoIn this paper, the optical properties of Ln2Ge2O7 ceramics (Ln = lanthanides) were evaluated by diffuse reflectance spectroscopy. Charge transfer band, energy gap, and intraconfigurational f-f transitions were investigated, identified, and discussed as a function of the structural features of the pyrocompounds. A medium band gap of 5.8 eV indicates that the space group has a small influence on this parameter (the triclinic pyrogermanates have slightly lower band gaps than the tetragonal ones), while the f-f electronic transitions could be entirely observed in all samples. In this respect, diffuse reflectance spectroscopy emerged as a powerful tool for the analysis of the intraconfigurational features in lanthanide-containing materials in association with photoluminescence data. The optical features reported in the present work represent an important evolution aiming at the deep knowledge of lanthanide pyrogermanates, which can assist in the development of devices with properties that meet the most advanced technological demands.
local.identifier.orcidhttps://orcid.org/0000-0001-7620-6708
local.identifier.orcidhttps://orcid.org/0000-0002-6344-3103
local.identifier.orcidhttps://orcid.org/0000-0003-0436-7857
local.identifier.orcidhttps://orcid.org/0000-0001-6820-0269
local.identifier.orcidhttps://orcid.org/0000-0001-7413-1087
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S0022231321004282

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