Effects of fluxes on preparation and luminescence properties of CaSi2O2N2:Eu2+ phosphors
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Abstract
Abstract The effect of fluxes on CaSi2O2N2:Eu2+ phosphors obtained via conventional solid-state reaction at atmospheric pressure is systematically investigated. The photoluminescence excitation and emission spectra of CaSi2O2N2:Eu2+ phosphors containing fluxes are investigated and discussed in detail. A strong emission band is observed peaked at 548 nm originating from transitions between 4f65d1 emitting state and 4f7 ground state of Eu2+ under near ultraviolet light (398 nm) excitation. The results show that the best synthesis temperature of the sample is 1450 °C with the absence of combustion aid to obtain single phase of CaSi2O2N2:Eu2+. After adding BaF2, NH4Cl and Na2CO3, single phase samples of CaSi2O2N2:Eu2+ with well-defined morphology can be successfully prepared at a temperature as low as 1400 °C. It is interesting that in the samples prepared under the assistance of BaF2 fluxes, the luminous intensity of Eu2+ is much higher than in the absence of fluxes.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Advanced Photocatalysis Techniques · Radiation Detection and Scintillator Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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