Optical properties of SrSi2O2N2:Eu2+ phosphor enhanced by the addition of carbonate or fluoride reactive agents

We describe powders of SrSi2O2N2:Eu2+ green phosphor synthesized with various reactive agents in a wide range of concentration. Two approaches are described, the first is adding carbonate reactive agents (K2CO3 and Li2CO3) to the initial powders excessively and, the second, using SrF2 reactive agent...

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Bibliographic Details
Published inJournal of alloys and compounds Vol. 845; p. 155468
Main Authors Adamczyk, B.J., Brik, M.G., Nagirnyi, V., Romet, I., Michalik, D., Pawlik, T., Sopicka-Lizer, M.
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier B.V 10.12.2020
Elsevier BV
Subjects
Agglomerates
Emission analysis
Emission spectra
Europium
Excitation spectra
LED
Morphology
Optical properties
Oxynitride phosphor
Particle size distribution
Phosphors
Photoluminescence
Potassium carbonate
Quantum efficiency
Reagents
Solid-state synthesis
Strontium fluorides
Thermoluminescence
Solid-state synthesis
LED
Oxynitride phosphor
Photoluminescence
Thermoluminescence
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Summary:We describe powders of SrSi2O2N2:Eu2+ green phosphor synthesized with various reactive agents in a wide range of concentration. Two approaches are described, the first is adding carbonate reactive agents (K2CO3 and Li2CO3) to the initial powders excessively and, the second, using SrF2 reactive agent as an additional Sr source to increase the reactivity. XRD and particle size distribution analysis elucidated several additional phases in the final phosphors and revealed changes of powder morphology, including the presence of particle agglomerates. The studies of emission and excitation spectra, emission quantum efficiency and thermal quenching as well as thermoluminescence, supported by the calculations of trap depths and parameters of the electron–phonon interaction, bring a comprehensive insight into the influence of reactive agents on the SrSi2O2N2:Eu2+ phosphor. •Fabrication of highly efficient oxynitride phosphor powders with usage of reactive agents.•Calculations of trap depths and the electron-vibrational interaction parameters.•Relationship between phase composition and photoluminescence properties.•Oxynitride phosphor solid state synthesis issues.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2020.155468