Eu3+-doped BaMO4 (M: W or Mo) luminescent materials for lighting applications prepared by coprecipitation method
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2021
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INTERNATIONAL CONFERENCE ON LUMINESCENCE, 19th
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This work presents the development and investigation of the structural, spectroscopic,
and electronic properties of Eu3+-doped BaMO4 (M: W or Mo) compounds obtained by
the coprecipitation method, at room temperature, targeting applications in phosphor-converted
Light-Emitting Diode (pc-LEDs) lighting devices [1,2]. A systematic study
was performed to determine optimal doping concentrations in order to obtain high-intensity
monochromatic-like luminescence with efficient lanthanide quantum yield for
red light emission. Structural analysis by X-Ray Powder Diffraction showed a stable
characteristic scheelite-type structure for all of the studied compounds, with no phase
segregation, as confirmed by Rietveld Refinement, whereas average crystallite size was
estimated to be about 30 nm. Morphology and elemental distribution were probed by
Scanning Electron Microscopy coupled with Energy dispersive X-ray spectroscopy,
where homogeneous europium distribution was identified even at high doping
concentrations (up to 10% molar). The optical behavior of the prepared materials was
studied by Diffuse Reflectance Spectroscopy and Luminescence Spectroscopy in the
UV-Vis range, displaying characteristic red emission, together with the nephelauxetic
effect associated with spectral red-shifts attributed to structural distortions around the
Eu3+ ion and significant (LMCT) contribution. The intensity parameters Ω2,4 and
lanthanide quantum yield QLn
Ln of all Eu-doped materials were also determined.
Furthermore, the CIE color diagram was investigated, showing the rate of greenish-blue
host matrix contribution ([WO4]2- or [MoO4]2-) and Eu3+ luminescence in different
compounds.
Como referenciar
MOREIRA, R.P.; FRANCISCO, L.H.C.; BRITO, H.F.; MALTA, O.L.; TEOTONIO, E.E.S.; FELINTO, MARIA C.F.C. Eu3+-doped BaMO4 (M: W or Mo) luminescent materials for lighting applications prepared by coprecipitation method. In: INTERNATIONAL CONFERENCE ON LUMINESCENCE, 19th, July 26-30, 2021, Changchun, China. Abstract... Disponível em: http://repositorio.ipen.br/handle/123456789/32673. Acesso em: 20 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.