Local Structure of Europium‐Doped Luminescent Strontium Fluoride Nanoparticles: Comparative X‐ray Absorption Spectroscopy and Diffraction Study
| Autor: | Kirill V. Yusenko, Ralph Wagner, Franziska Emmerling, Anke Kabelitz, Ana Guilherme Buzanich, Alexander Schökel, Erhard Kemnitz, Thoralf Krahl, Carsten Prinz |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Diffraction
X-ray absorption spectroscopy Materials science strontium fluoride Extended X-ray absorption fine structure Renewable Energy Sustainability and the Environment Doping europium fluoride Strontium fluoride Energy Engineering and Power Technology Nanoparticle chemistry.chemical_element 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten Biomaterials chemistry.chemical_compound EXAFS chemistry Materials Chemistry luminescence Physical chemistry nanoparticles ddc:620 Luminescence Europium |
| Zdroj: | ChemNanoMat 7(11), 1221-1229 (2021). doi:10.1002/cnma.202100281 |
| DOI: | 10.1002/cnma.202100281 |
| Popis: | ChemNanoMat 7(11), 1221 - 1229 (2021). doi:10.1002/cnma.202100281 Rare-earth based luminescent materials are key functional components for the rational design of light-conversion smart devices. Stable Eu$^{3+}$-doped strontium fluoride (SrF$_2$) nanoparticles were prepared at room temperature in ethylene glycol. Their luminescence depends on the Eu content and changes after heat treatment. The crystallinity of heat-treated material increases in comparison with as-synthesized samples. Particles were investigated in solution using X-ray diffraction, small-angle X-ray scattering, and X-ray spectroscopy. After heat treatment, the size of the disordered nanoparticles increases together with a change of their local structure. Interstitial fluoride ions can be localized near Eu$^{3+}$ ions. Therefore, non-radiative relaxation from other mechanisms is decreased. Knowledge about the cation distribution is key information for understanding the luminescence properties of any material. Published by Wiley, Weinheim |
| Databáze: | OpenAIRE |
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