研究目的
Investigating the luminescent properties of Dy3+/Eu3+ doped fluorescent glass for white LED based on oxyfluoride matrix.
研究成果
The fluoroborosilicate glasses doped with Dy3+ and Dy3+/Eu3+ were prepared by melt-cooling method. The results show that emission intensity of the sample doped with 0.5 mol% Dy3+ is the strongest, and Y/B increases continuously with the increasing concentration of Dy3+. The change of emission intensity and decay curve test show that energy transfer from Dy3+ to Eu3+ in the glass, belonging to non-radiative transition. The tunable CCTs of the samples range from 7800 to 2700 K with the increasing concentration of Eu3+, which are suitable for different working environments. Therefore, the potential fluorescent glass can meet the demand of the luminescent material.
研究不足
The technical and application constraints of the experiments, as well as potential areas for optimization, are not explicitly mentioned in the paper.
1：Experimental Design and Method Selection:
The fluoroborosilicate glasses doped with Dy3+ and Dy3+/Eu3+ were prepared by melt-cooling method.
2：Sample Selection and Data Sources:
The compositions of the glasses were (45–i)SiO2-15B2O3-10BaF2-10CaO-20Na2O-iDy2O3 (where i =
3：25, 5, 75, 1mol%) and (5–j)SiO2-15B2O3-10BaF2-10CaO-20Na2O-5Dy2O3- jEu2O3 (where j = 05 mol%, 1 mol%, 2 mol%, 3 mol%). List of Experimental Equipment and Materials:
A Lambda 950 spectrometer for absorption spectrum measurement, and a F-7000FL spectrometer for photoluminescence spectrum and decay profiles recording.
4：Experimental Procedures and Operational Workflow:
All raw materials were accurately weighed, ground thoroughly in agate mortar, stirred, poured into corundum, held at 1450 ℃ for 1 h, and quickly poured into a preheated and quenched mold at 500 ℃. Annealed in a muffle furnace for 2 h.
5：Data Analysis Methods:
The CIE chromaticity coordinates were calculated to characterize the luminescent color of the samples.
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