研究目的
To develop new rare earth ions doped phosphors and perform basic research on their structure and luminescent properties, specifically synthesizing and investigating Ca7Zn2(PO4)6 doped with Eu3+, Sm3+, and Pr3+ ions.
研究成果
The synthesized phosphors exhibit characteristic red emissions with high color purity, making them promising for applications in luminescence devices. Future studies could focus on enhancing emission intensity and exploring other host materials.
研究不足
The study is limited to room temperature measurements and specific doping concentrations; potential optimizations could include varying synthesis conditions or exploring other rare earth dopants.
1：Experimental Design and Method Selection:
The phosphors were synthesized using the traditional high-temperature solid-state reaction method. The crystal structure was analyzed using X-ray diffraction with Rietveld refinement, and photoluminescence properties were examined using fluorescence spectrophotometry.
2：Sample Selection and Data Sources:
Samples were prepared with specific stoichiometric proportions of CaCO3, ZnO, (NH4)2HPO4, and rare earth oxides (Eu2O3, Sm2O3, Pr6O11).
3：1). List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Equipment includes Rigaku Ultima IV X-ray diffractometer, S-4800 scanning electron microscope with energy dispersive spectrometer, and FS5-MCS fluorescence spectrophotometer. Materials include CaCO3 (99%), ZnO (99%), (NH4)2HPO4 (99%), Eu2O3 (
4：99%), Sm2O3 (99%), Pr6O11 (99%), ethanol, and Li2COExperimental Procedures and Operational Workflow:
Reactants were weighed, mixed with ethanol, fired at 1180°C for 8 hours in a muffle furnace, and cooled to room temperature. Measurements were performed at room temperature.
5：Data Analysis Methods:
Rietveld refinement for XRD data, exponential fitting for decay curves using specific equations, and calculation of CIE coordinates and color purity.
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X-ray diffractometer
Ultima IV
Rigaku
Identified the crystal structure of the phosphors using X-ray diffraction.
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Scanning electron microscope
S-4800
Examined the microstructure and morphology of the samples.
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Fluorescence spectrophotometer
FS5-MCS
Measured photoluminescence spectra and fluorescence decay times.
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Electronic balance
Accurately weighed the reactants for synthesis.
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Muffle furnace
Fired the samples at high temperature for synthesis.
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Agate mortar
Used for mixing the sample powder with ethanol.
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Alumina crucible
Held the samples during firing in the muffle furnace.
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