| People | Locations | Statistics |
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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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Verbeeck, Jo
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (22/22 displayed)
- 2024Phase coexistence induced surface roughness in V<sub>2</sub>O<sub>3</sub>/Ni magnetic heterostructurescitations
- 2024Stabilizing Perovskite Pb(Mg<sub>0.33</sub>Nb<sub>0.67</sub>)O<sub>3</sub>-PbTiO<sub>3</sub> Thin Films by Fast Deposition and Tensile Mismatched Growth Templatecitations
- 2023Low-Dose 4D-STEM Tomography for Beam-Sensitive Nanocompositescitations
- 2022On the formation mechanisms of intragranular shear bands in olivine by stress-induced amorphizationcitations
- 2021Optical versus electron diffraction imaging of Twist-angle in 2D transition metal dichalcogenide bilayerscitations
- 2021Increased performance improvement of lithium-ion batteries by dry powder coating of high-nickel NMC with nanostructured fumed ternary lithium metal oxidescitations
- 2020Single femtosecond laser pulse excitation of individual cobalt nanoparticlescitations
- 2020Reliable Characterization of Organic and Pharmaceutical Compounds with High Resolution Monochromated EEL Spectroscopycitations
- 2020Unravelling stacking order in epitaxial bilayer MX₂ using 4D-STEM with unsupervised learningcitations
- 2019Controlling the interfacial conductance in <tex>$LaAlO_{3}/SrTiO_{3}$</tex> in 90 degrees off-axis sputter depositioncitations
- 2018Getting rid of anti-solvents: gas quenching for high performance perovskite solar cellscitations
- 2017Energy level alignment and cation charge states at the <tex>$LaFeO_{3}/LaMnO_{3}$</tex> (001) heterointerfacecitations
- 2017One step toward a new generation of C-MOS compatible oxide PN junctionscitations
- 2017Direct observation of enhanced magnetism in individual size- and shape-selected 3d transition metal nanoparticlescitations
- 2016A universal deposition protocol for planar heterojunction solar cells with high efficiency based on hybrid lead halide perovskite familiescitations
- 2016Long-range domain structure and symmetry engineering by interfacial oxygen octahedral coupling at heterostructure interfacecitations
- 2016Engineering properties by long range symmetry propagation initiated at perovskite heterostructure interface
- 2015Co-rich ZnCoO nanoparticles embedded in wurtzite <tex>$Zn_{1-x}Co_{x}O$</tex> thin filmscitations
- 2014Crystal Structure and Luminescent Properties of R2-xEux(MoO4)(3) (R = Gd, Sm) Red Phosphorscitations
- 2014Influence of the structure on the properties of <tex>$Na_{x}Eu_{y}(MoO_{4})_{z}$</tex> red phosphorscitations
- 2012Artificial construction of the layered Ruddlesden–Popper Manganite La2Sr2Mn3O10by reflection high energy electron diffraction monitored pulsed laser deposition
- 2012Grain size tuning of nanocrystalline chemical vapor deposited diamond by continuous electrical bias growth: Experimental and theoretical studycitations
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.