研究目的
Investigating the luminescent properties and energy transfer mechanisms in Sm3+, Eu3+ co-doped NaLa(WO4)2 phosphors for potential applications in optical devices.
研究成果
The study confirms the energy transfer between Eu3+ and Sm3+ in NaLa(WO4)2 phosphors, with the mechanism attributed to exchange interaction. The electron-phonon coupling is weak, and the luminescent properties can be tuned by adjusting the doping concentrations.
研究不足
The study focuses on the luminescent properties and energy transfer mechanisms but does not explore the practical application in devices in depth.
1：Experimental Design and Method Selection:
The molten salt method was used to fabricate tungstate materials.
2：Sample Selection and Data Sources:
La(NO3)3, Eu(NO3)3, Na2WO4, Sm(NO3)3 and NaNO3 were used as reagents.
3：List of Experimental Equipment and Materials:
D/max-2600 X ray diffractometer and Fluoromax-4 fluorescence spectrophotometer were used.
4：Experimental Procedures and Operational Workflow:
The mixture was ground for 4 h and calcined at 350℃ for 3 h, then washed with deionized water and centrifuged.
5：Data Analysis Methods:
The XRD pattern, emission spectra, excitation spectra, and fluorescence decay curves were analyzed.
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