研究目的
Investigating the upconversion properties of BaY2(MoO4)4:Er3+/Yb3+ green phosphors synthesized via a cyclic microwave-modified sol-gel route.
研究成果
The BaY2(MoO4)4:Er3+/Yb3+ phosphors were successfully synthesized, exhibiting strong green and weak red emissions under 980 nm excitation. The Raman spectra showed strong peaks at higher frequencies and weak peaks at lower frequencies, indicating high crystallization.
研究不足
The study is limited by the specific doping concentrations of Er3+ and Yb3+ used and the synthesis method's dependency on microwave and heat treatment conditions.
1：Experimental Design and Method Selection:
The study employed a cyclic microwave-modified sol-gel process for the synthesis of BaY2(MoO4)4:Er3+/Yb3+ phosphors.
2：Sample Selection and Data Sources:
Stoichiometric amounts of Ba(NO3)2, Y(NO3)3·6H2O, (NH4)6Mo7O24·4H2O, Er(NO3)3·5H2O, Yb(NO3)3·5H2O, citric acid, NH4OH, ethylene glycol, and distilled water were used.
3：List of Experimental Equipment and Materials:
Microwave oven (
4：45 GHz, 1250 W), XRD (D/MAX 2200, Rigaku), SEM/EDS (JSM-5600, JEOL), spectrophotometer (Perkin Elmer LS55), and Raman spectrometer (LabRam Aramis, Horiba Jobin-Yvon). Experimental Procedures and Operational Workflow:
The transparent solutions were treated in a microwave oven, followed by drying and heat treatment at 900 °C for 12 h.
5：Data Analysis Methods:
XRD for phase composition, SEM/EDS for microstructure and surface morphology, PL spectra for optical properties, and Raman spectroscopy for vibrational modes.
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Ba(NO3)2
99 %
Sigma-Aldrich
Used as a precursor in the synthesis of BaY2(MoO4)4:Er3+/Yb3+ phosphors.
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Y(NO3)3·6H2O
99 %
Sigma-Aldrich
Used as a precursor in the synthesis of BaY2(MoO4)4:Er3+/Yb3+ phosphors.
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Er(NO3)3·5H2O
99.9 %
Sigma-Aldrich
Used as a dopant in the synthesis of BaY2(MoO4)4:Er3+/Yb3+ phosphors.
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Yb(NO3)3·5H2O
99.9 %
Sigma-Aldrich
Used as a dopant in the synthesis of BaY2(MoO4)4:Er3+/Yb3+ phosphors.
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XRD
D/MAX 2200
Rigaku
Used for phase composition identification of the synthesized particles.
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SEM/EDS
JSM-5600
JEOL
Used for microstructure and surface morphology observation of the synthesized particles.
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Spectrophotometer
Perkin Elmer LS55
Perkin Elmer
Used for recording PL spectra at room temperature.
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(NH4)6Mo7O24·4H2O
99 %
Alfa Aesar
Used as a precursor in the synthesis of BaY2(MoO4)4:Er3+/Yb3+ phosphors.
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Raman Spectrometer
LabRam Aramis
Horiba Jobin-Yvon
Used for Raman spectroscopy measurements.
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