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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Poelman, Dirk
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (27/27 displayed)
- 2024Ratiometric dual-emitting thermometers based on rhodamine B dye-incorporated (nano) curcumin periodic mesoporous organosilicas for bioapplicationscitations
- 2024Evolution of low Z-elements in a Ni/MgFeAlO 4 catalyst during reaction : insight from in situ XRScitations
- 2024Unleashing the glow : upconverting nanoparticles recharge persistent luminescent materials - applications in 3D-printing and optical codingcitations
- 2023Flexible and luminescent polymer nanocomposite films (YPO4:Pr3+/ polystyrene) : investigation of structural, morphological and photoluminescence properties for solid-state lighting applicationscitations
- 2023The exact morphology of metal organic framework MIL-53(Fe) influences its photocatalytic performancecitations
- 2023Thermoluminescence dosimetric and kinetic characterization of Pakistani fluorite after β irradiationcitations
- 2023Crystalline tin disulfide by low-temperature plasma-enhanced 2 atomic layer deposition as an electrode material for Li-ion batteries 3 and CO2 electroreductioncitations
- 2023High temperature H2S removal via CO2-assisted chemical looping over ZrO2-modified Fe2O3citations
- 2023Plasma-enhanced atomic layer deposition of crystalline Ga2S3 thin filmscitations
- 2023Plasma-enhanced atomic layer deposition of crystalline Ga2S3 thin filmscitations
- 2022Photocatalytic nanocomposite membranes for environmental remediationcitations
- 2021Young's modulus of thin SmS films measured by nanoindentation and laser acoustic wavecitations
- 2021Emergence of Metallic Conductivity in Ordered One-Dimensional Coordination Polymer Thin Films upon Reductive Dopingcitations
- 2020A new microwave approach for the synthesis of green emitting Mn2+-doped ZnAl2O4citations
- 2020A new microwave approach for the synthesis of green emitting Mn 2+ -doped ZnAl 2 O 4 :A detailed study on its structural and optical propertiescitations
- 2019SmS/EuS/SmS tri-layer thin films : the role of diffusion in the pressure triggered semiconductor-metal transitioncitations
- 2019Sol-gel syntheses of photocatalysts for the removal of pharmaceutical products in watercitations
- 2018Visible-enhanced photocatalytic performance of CuWO4/WO3 hetero-structurescitations
- 2014Crystal Structure and Luminescent Properties of R2-xEux(MoO4)(3) (R = Gd, Sm) Red Phosphorscitations
- 2013Cs7Nd11(SeO3)(12)Cl-16: first noncentrosymmetric structure among alkaline-metal lanthanide selenite halidescitations
- 2013Combining optical and electrical studies to unravel the effect of Sb doping on CIGS solar cell
- 2012The configuration of rare earth centers in nitridosilicates: an x-ray absorption and optical investigation
- 2010Structure and luminescence of (Ca,Sr)2SiS4:Eu2+ phosphorscitations
- 2008Cathodoluminescence mapping with an energy-dispersive x-ray detector: principle, simulation and application
- 2008Synthesis and photoluminescence characteristics of Al2O3 thin films doped with (Ca,Sr)S:Eu2+
- 2008Cathodoluminescence mapping with an EDX detector: principle, simulation and application
- 2007Effect of microstructure and crystallinity on the photocatalytic activity of TiO2 thin films deposited by dc magnetron sputtering
Places of action
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article
Crystal Structure and Luminescent Properties of R2-xEux(MoO4)(3) (R = Gd, Sm) Red Phosphors
Abstract
The R-2(MoO4)(3) (R = rare earth elements) molybdates doped with Eu3+ cations are interesting red-emitting materials for display and solid-state lighting applications. The structure and luminescent properties of the R2-xEux(MoO4)(3) (R = Gd, Sm) solid solutions have been investigated as a function of chemical composition and preparation conditions. Monoclinic (alpha) and orthorhombic (beta') R2-xEux(MoO4)(3) (R = Gd, Sm; 0 <= x <= 2) modifications were prepared by solid-state reaction, and their structures were investigated using synchrotron powder X-ray diffraction and transmission electron microscopy. The pure orthorhombic beta'-phases could be synthesized only by quenching from high temperature to room temperature for Gd2-xEux(MoO4)(3) in the Eu3+-rich part (x > 1) and for all Sm2-xEux(MoO4)(3) solid solutions. The transformation from the alpha-phase to the beta'-phase results in a notable increase (similar to 24%) of the unit cell volume for all R2-xEux(MoO4)(3) (R = Sm, Gd) solid solutions. The luminescent properties of all R2-xEux(MoO4)(3) (R = Gd, Sm; 0 <= x <= 2) solid solutions were measured, and their optical properties were related to their structural properties. All R2-xEux(MoO4)(3) (R = Gd, Sm; 0 <= x <= 2) phosphors emit intense red light dominated by the D-5(0)-> F-7(2) transition at similar to 616 nm. However, a change in the multiplet splitting is observed when switching from the monoclinic to the orthorhombic structure, as a consequence of the change in coordination polyhedron of the luminescent ion from RO8 to RO7 for the alpha- and beta'-modification, respectively. The Gd2-xEux(MoO4)(3) solid solutions are the most efficient emitters in the range of 0 < x < 1.5, but their emission intensity is comparable to or even significantly lower than that of Sm2-xEux(MoO4)(3) for higher Eu3+ concentrations (1.5 <= x <= 1.75). Electron energy loss spectroscopy (EELS) measurements revealed the influence of the structure and element content on the number and positions of bands in the ultraviolet-visible-infrared regions of the EELS spectrum.