研究目的
Investigating the energy transfer and tunable photoluminescence of Sr6Gd2Na2(PO4)6F2:Tb3+, Eu3+ phosphors for near-UV white LEDs.
研究成果
The Sr6Gd2Na2(PO4)6F2:Tb3+, Eu3+ phosphors exhibit effective energy transfer from Tb3+ to Eu3+ via dipole-quadrupole interaction, tunable photoluminescence from green to white light, and potential for application in white LEDs.
研究不足
The presence of a small impurity phase and the need for optimization of the doping concentrations for better performance.
1:Experimental Design and Method Selection:
High-temperature solid-state reaction method was used to synthesize the phosphors.
2:Sample Selection and Data Sources:
Materials included SrCO3, NH4H2PO4, NaF, Eu2O3, and Tb2O
3:List of Experimental Equipment and Materials:
X-ray powder diffraction (XRD) using Bruker D2 system, Hitachi F-7000 fluorescence spectrophotometer, FluoroLog-3 spectro fluorometer.
4:Experimental Procedures and Operational Workflow:
Materials were weighed, ground, heated at 1400℃ for 4h, cooled, and reground.
5:Data Analysis Methods:
XRD for phase structure, PL and PLE spectra for photoluminescence properties, decay curves for energy transfer analysis.
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