研究目的
To enhance the red upconversion emission of LiGdF4:Yb3+/Ho3+ nanorods by doping with Ce3+ and investigate the effects of Ce3+ concentration on the emission properties.
研究成果
The study successfully enhanced the red upconversion emission of LiGdF4:Yb3+/Ho3+ nanorods by doping with Ce3+, achieving a 20-fold increase in the red to green emission ratio. This was attributed to efficient cross relaxation processes between Ho3+ and Ce3+ ions. The work demonstrates the potential of these materials in biological imaging and color display applications.
研究不足
The study is limited to the synthesis and characterization of LiGdF4:Yb3+/Ho3+ nanorods with Ce3+ doping. The potential applications in biological imaging and color displays are suggested but not experimentally verified.
1：Experimental Design and Method Selection:
A facile oil heated method at 200 °C was used to synthesize tetragonal phase LiGdF4:Yb3+/Ho3+ nanorods tri-doped with Ce3+.
2：3+. Sample Selection and Data Sources:
2. Sample Selection and Data Sources: Samples with different Ce3+ concentrations from 0 to 16 mol% were prepared.
3：List of Experimental Equipment and Materials:
X-ray powder diffractometer (D/max 2200v), transmission electron microscopy (HEOL-3000F TEM), ZOLIX fluorescence spectrometer system, 980 nm semiconductor laser.
4：Experimental Procedures and Operational Workflow:
The synthesis involved mixing rare earth chlorides with LiOH, oleic acid, and NH4F, followed by heating in a Teflon-lined autoclave. The products were collected by centrifugation, washed, and dried.
5：Data Analysis Methods:
XRD and TEM were used for structural and morphological characterization, and fluorescence spectroscopy for emission properties.
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