| 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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Lebedev, Oleg
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2024Entanglement of cation ordering and manipulation of the magnetic properties through a temperature-controlled topotactic interface reaction in nanocomposite perovskite oxides
- 2024PbSe Quantum Dot Superlattice Thin Films for Thermoelectric Applicationscitations
- 2024Structural, optical, and electronic properties of single crystals of 4H lead-based hexagonal hybrid perovskite
- 2023Artificial Aging of Thin Films of the Indium-Free Transparent Conducting Oxide SrVO 3citations
- 2022Mixed (Sr 1 − x Ca x ) 33 Bi 24 Al 48 O 141 fullerenoids: the defect structure analysed by (S)TEM techniques
- 20225D total scattering computed tomography reveals the full reaction mechanism of a bismuth vanadate lithium ion battery anodecitations
- 20223D LiMn 2 O 4 Thin Film Deposited by ALD: A Road toward High‐Capacity Electrode for 3D Li‐Ion Microbatteriescitations
- 20223D LiMn<sub>2</sub>O<sub>4</sub> Thin Film Deposited by ALD: A Road toward High‐Capacity Electrode for 3D Li‐Ion Microbatteriescitations
- 2022Synthetic strategy for metallophthalocyanine covalent organic frameworks for electrochemical water oxidationcitations
- 2022Path Less Traveled: A Contemporary Twist on Synthesis and Traditional Structure Solution of Metastable LiNi 12 B 8citations
- 2021Transport and Thermoelectric Coefficients of the Co 9 S 8 Metal: A Comparison with the Spin Polarized CoS 2citations
- 2020Lithium-driven conversion and alloying mechanisms in core-shell Sn/SnOx nanoparticlescitations
- 2020A scalable synthesis route for multiscale defect engineering in the sustainable thermoelectric quaternary sulfide Cu26V2Sn6S32citations
- 2020Li 2 O:Li–Mn–O Disordered Rock‐Salt Nanocomposites as Cathode Prelithiation Additives for High‐Energy Density Li‐Ion Batteriescitations
- 2019Sn(TFSI) 2 as Suitable Salt For the Electrodeposition of Nanostructured Cu 6 Sn 5 - Sn Composite obtained on Cu electrode in Ionic Liquidcitations
- 2017Layered tellurides: stacking faults induce low thermal conductivity in the new In 2 Ge 2 Te 6 and thermoelectric properties of related compoundscitations
- 2014Structural, magnetic and transport properties of 2D structured perovskite oxychalcogenidescitations
- 2014ZrSe 3 -Type Variant of TiS 3 : Structure and Thermoelectric Propertiescitations
- 2014Influence of the structure on the properties of <tex>$Na_{x}Eu_{y}(MoO_{4})_{z}$</tex> red phosphorscitations
- 2012Magnetodielectric CuCr 0.5 V 0.5 O 2 : an example of a magnetic and dielectric multiglasscitations
- 2007Critical temperature modification of low dimensional superconductors by spin dopingcitations
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article
Influence of the structure on the properties of <tex>$Na_{x}Eu_{y}(MoO_{4})_{z}$</tex> red phosphors
Abstract
Scheelite related compounds (A',A '')(n)[(B',B '')O-4](m) with B', B '' = W and/or Mo are promising new materials for red phosphors in pc-WLEDs (phosphor-converted white-light-emitting-diode) and solid-state lasers. Cation substitution in CaMoO4 of Ca2+ by the combination of Na+ and Eu3+, with the creation of A cation vacancies, has been investigated as a factor for controlling the scheelite-type structure and the luminescent properties. Na5Eu(MoO4)(4) and NaxEu(2-x)/33+square(2-x)/3MoO4 (0.138 <= x <= 0.5) phases with a scheelite-type structure were synthesized by the solid state method; their structural characteristics were investigated using transmission electron microscopy. Contrary to powder synchrotron X-ray diffraction before, the study by electron diffraction and high resolution transmission electron microscopy in this paper revealed that Na0.286Eu0.571MoO4 has a (3 + 2)D incommensurately modulated structure and that (3 + 2)D incommensurately modulated domains are present in Na0.200Eu0.600MoO4. It also confirmed the (3 + 1)D incommensurately modulated character of Na(0.138)Eu(0.621)Mo04. The luminescent properties of all phases under near-ultraviolet (n-UV) light have been investigated. The excitation spectra of these phosphors show the strongest absorption at about 395 nm, which matches well with the commercially available n-UV-emitting GaN-based LED chip. The emission spectra indicate an intense red emission due to the D-5(0) -> F-7(2) transition of Eu3+, with local minima in the intensity at Na0.286Eu0.571MoO4 and Na0.200Eu0.600MoO4 for similar to 613 nm and similar to 616 nm bands. The phosphor Na5Eu(MoO4)(4) shows the brightest red light emission among the phosphors in the Na2MoO4-Eu2/3MoO4 system and the maximum luminescence intensity of Na5Eu(MoO4)(4) (lambda(ex) = 395 nm) in the D-5(0) -> F-7(2) transition region is close to that of the commercially used red phosphor YVO4:Eu3+ (lambda(ex) = 326 nm). Electron energy loss spectroscopy measurements revealed the influence of the structure and Na/Eu cation distribution on the number and positions of bands in the UV-optical-infrared regions of the EELS spectrum.