研究目的
Investigating the enhanced long afterglow of SrAl2Si2O8:Eu2+ by codoping Dy3+.
研究成果
The co-doped Dy3+ ions act as trap centers, significantly enhancing the intensity and prolonging the afterglow duration of SrAl2Si2O8:Eu2+. This indicates potential applications in future opto-electronic devices.
研究不足
The study focuses on the luminescent properties and afterglow enhancement but does not explore the potential for scaling up the synthesis process or the cost-effectiveness of the materials for commercial applications.
1：Experimental Design and Method Selection:
The phosphors were synthesized by a solid state reaction. The phase and luminescent properties were investigated by X-ray powder diffraction, photoluminescence spectra, decay curves, and thermo-luminescence glow curves.
2：Sample Selection and Data Sources:
Stoichiometric amounts of raw materials (SrCO3, α-Al2O3, SiO2, Eu2O3, Dy2O3) were used.
3：List of Experimental Equipment and Materials:
Rigaku D/max-RA X-ray diffractometer, Edinburgh Instrument FLS920 spectrophotometer, PR305 long-lasting luminescence detector, muffle furnace.
4：Experimental Procedures and Operational Workflow:
The mixture was calcined at 1400°C for 6h in a muffle furnace under a reducing atmosphere for Eu2+ and Eu2+/Dy3+ doped samples.
5：Data Analysis Methods:
XRD patterns were analyzed for phase identification, photoluminescence spectra for excitation and emission characteristics, decay curves for afterglow duration, and thermo-luminescence for trap analysis.
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Rigaku D/max-RA X-ray diffractometer
D/max-RA
Rigaku
Performing X-ray diffraction patterns for phase identification.
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Edinburgh Instrument FLS920 spectrophotometer
FLS920
Edinburgh Instrument
Measuring excitation and emission spectra.
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PR305 long-lasting luminescence detector
PR305
Measuring afterglow decay curves.
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Muffle furnace
Calcining the mixture of raw materials.
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