Investigation of rare earth distribution in Sr2MgSi2O7:Eu2+,Dy3+ nanophosphors prepared by wet-chemical routes
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2017
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INTERNATIONAL CONFERENCE ON LUMINESCENCE, 18th
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Luminescent materials have been developed through ne chemistry methods that help to achieve
a better control of parameters such as morphology, particle size, atomic homogeneity and high purity
single phase in low temperature synthesis.[1, 2] In this work, the material Sr1:98MgSi2O7 nanoparticles
doped with 0.01 mol of Eu2+ and codoped with 0.01 mol of Dy3+ was prepared via Pechini and
Condensation methods. Post-annealing by microwave assisted method using granular coal as the
susceptor/reducing agent [3] was applied on both materials and their luminescent properties were
compared. The structural position of Eu2+ used as the activator ions determines photoluminescence
properties. The luminescence spectra of Sr2MgSi2O7:Rn+ nanomaterial (R: Eu2+, Dy3+) shows a high
emission broad band assigned to the intercon gurational transition 4f65d1 ! 4f7 centered around 460
nm, which is overlapped with a low emission lines attributed to the 4F9=2 ! 6H13=2 transition of Dy3+
ion (Fig. 1b). Elemental mappings obtained by Energy Dispersive X-Ray (EDX) presents dopants
more likely to be found at the edge, indicating a possible segregation of rare earths to the grain
boundaries during the synthesis (Fig. 1c). The persistent luminescence phenomenon emitting in a
blue region was observed for both nanomaterials.
Como referenciar
BONTURIM, E.; REIS, R. dos; MERIZIO, L.G.; RODRIGUES, L.C.V.; BRITO, H.F.; FELINTO, M.C.F.C. Investigation of rare earth distribution in Sr2MgSi2O7:Eu2+,Dy3+ nanophosphors prepared by wet-chemical routes. In: INTERNATIONAL CONFERENCE ON LUMINESCENCE, 18th, August 27 - September 1, 2017, João Pessoa, PB. Abstract... Disponível em: http://repositorio.ipen.br/handle/123456789/27985. Acesso em: 23 May 2024.
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