Comparison of structural and spectroscopic properties of Ho3+-doped niobate compounds

Autor(es)

Guene-Girard, S. ^[1] ; Courtois, J. ^[1] ; Dussauze, M. ^[2] ; Heintz, J-M ^[1] ; Fargues, A. ^[1] ; Roger, J. ^[3] ; Nalin, M. ^[4] ; Cardinal, T. ^[1] ; Jubera, V ^[1]

Afiliação do(s) autor(es)

^[1] Univ Bordeaux, ICMCB, Bordeaux INP, CNRS, UMR 5026, F-33600 Pessac - France

^[2] Univ Bordeaux, ISM Inst Mol Sci, CNRS, UMR 5255, F-33405 Talence - France

^[3] Univ Bordeaux, Lab Composites ThermoStruct, CNRS, UMR 5801, F-33600 Pessac - France

^[4] Sao Paulo State Univ UNESP, Chem Inst, BR-14800060 Araraquara, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Materials Research Bulletin; v. 143, NOV 2021.
• Citações Web of Science: 0

Resumo

Ho3+-doped YNbO4 and Y3NbO7 phosphors were synthesised via a co-precipitation synthesis route. Structural characterisation and spectroscopic properties were performed as a function of the Ho3+ concentration. The Rietveld type-refinement confirms the stabilisation of the pure monoclinic Fergusonite YNbO4 phase at the highest temperatures, but the quadratic phase is stabilised for the lowest temperature, whereas a pure cubic fluorite Y3NbO7 phase was observed for all of the heat treatments. Raman and infrared spectroscopies were used to compare the cation-oxygen vibrational modes. Emission spectra and up-conversion processes were obtained under excitation at 445 and 975 nm respectively. For a similar Ho3+ content, the energy transfers observed show differences between the two crystalline compounds that are related to a stronger interaction between the holmium cations in the fluorite host lattice. (AU)

• Processo FAPESP: 19/01223-0 - Estudo das propriedades ópticas e magnéticas de vidros óxidos de metais pesados e suas aplicações em impressão 3D
• Beneficiário: Marcelo Nalin
• Modalidade de apoio: Bolsas no Exterior - Pesquisa
• Processo FAPESP: 13/07793-6 - CEPIV - Centro de Ensino, Pesquisa e Inovação em Vidros
• Beneficiário: Edgar Dutra Zanotto
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs