The role of compensation defects in Eu3+ stabilization under reductive atmosphere in Sr2SiO4 matrix
| Autor: | Marek Grinberg, Natalia Górecka, J. Barzowska, Karol Szczodrowski |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Mechanical Engineering Sodium Doping Inorganic chemistry Metals and Alloys chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Ion chemistry.chemical_compound chemistry Mechanics of Materials Materials Chemistry Lithium Orthosilicate 0210 nano-technology Luminescence Europium Boron |
| Zdroj: | Journal of Alloys and Compounds. 748:44-50 |
| ISSN: | 0925-8388 |
| Popis: | Luminescent materials based on strontium orthosilicate doped with a fixed concentration of europium and co-doped with various concentrations of sodium, lithium and boron were synthesized in order to study the role of co-dopants in luminescent properties of europium ions. The obtained materials were characterized using powder X-ray diffraction (XRD) technique. The results of the optical measurements indicate that the incorporation of sodium or lithium increases emission intensity of Eu3+, but does not stabilize Eu3+ under reductive (5% H2/N2) atmosphere, which was observed for the boron co-doping. Moreover, it is shown that the sodium or lithium co-doping facilitates the reduction process of Eu3+ → Eu2+. The obtained results suggest that diffusion limited processes are crucial for the stabilization of Eu3+ during the reduction step of synthesis. |
| Databáze: | OpenAIRE |
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