研究目的
Investigating the up-converted optical properties of PbY2-x(MoO4)4:Er3+/Yb3+ double molybdate phosphors prepared using the sol-gel method assisted by microwave technique.
研究成果
The PbY2-x(MoO4)4:Er3+/Yb3+ double molybdate phosphors prepared by the microwave sol-gel method exhibit well-crystallized morphology and fine grain sizes. They show strong up-converted emission bands in the green and red regions under 980 nm excitation, attributed to the incorporation of Er3+ and Yb3+ ions into the crystal lattice, leading to unit cell shrinkage and highly modulated MoO4-x group. These materials have potential applications in optoelectronic devices and photoluminescent imaging.
研究不足
The study is limited to the specific doped concentrations of Er3+ and Yb3+ and the microwave sol-gel method. The identification of secondary phases in the XRD patterns is difficult due to weak peaks.
1：Experimental Design and Method Selection:
The sol-gel method assisted by microwave technique was used to prepare PbY2-x(MoO4)4:Er3+/Yb3+ double molybdate phosphors.
2：Sample Selection and Data Sources:
Precise amounts of Pb(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, XRD (D/MAX 2200, Rigaku, Japan), SEM/EDS (JSM-5600, JEOL, Japan), spectrophotometer (Perkin Elmer LS55, UK), LabRam Aramis (Horiba Jobin-Yvon, France).
4：Experimental Procedures and Operational Workflow:
The samples were prepared by dissolving the precursors in NH4OH and ethylene glycol, then treated in a microwave oven, dried, and heat-treated at 900 °C for 16 h.
5：Data Analysis Methods:
XRD for phase identification, SEM for morphology observation, spectrophotometer for up-converted photoluminescence spectra, and Raman spectroscopy for spectroscopic properties.
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