Rare earth-doped multicolor fluorescent emission glass suitable for white light LED and preparation method thereof
A fluorescence emission and rare earth doping technology, which is applied in the field of luminescent glass doped with rare earth ions for white LEDs and its preparation, can solve the problems of low light conversion efficiency, easy aging of epoxy resin, and easy drift of white light, and achieve good results. Thermal and chemical stability, low cost, uniform luminous effect
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Embodiment 1-5
[0036] Using analytically pure SiO 2 、H 3 BO 3 、Na 2 CO 3 , chemically pure SrF 2 and 99.99% DyF 3 As the main raw material, the component molar ratio is SiO 2 : 50, B 2 o 3 : 20, Na 2 O: 18, SrF 2 : 10, DyF 3 : x, the composition of x=0.5, 1, 1.5, 2, 2.5 (in order of embodiment 1-5) weighed 4g of batch materials, and the quality and luminescent performance parameters of each raw material are shown in Table 1 and Table 2.
[0037] The glass composition quality (g) of table 1 embodiment 1-5
[0038]
[0039] Each sample was accurately weighed and ground and mixed in a mortar and pestle for 30 minutes. Then each batch was placed in each corundum crucible and melted in an electric furnace at 1400° C. for 30 minutes. Pour the molten glass into a preheated mold and press it into shape. Annealed at 600° C. for 2 hours to obtain the glass samples of Examples 1-5. The emission spectrum of embodiment 1-5 under 354nm excitation is as figure 1 shown. Dy 3+ Ions emit ...
Embodiment 6-10
[0044] Using analytically pure SiO 2 、H 3 BO 3 、Na 2 CO 3 , chemically pure SrF 2 and 99.99% CeF 3 、DyF 3 As the main raw material, the component molar ratio is SiO 2 : 50, B 2 o 3 : 20, Na 2 O: 18, SrF 2 : 10, CeF 3 : 0.5, DyF 3: x, the composition of x=0,0.1,0.3,0.5,0.75 (be followed by embodiment 6-10) takes batch by weighing. Each raw material quality and luminescent performance parameters are as shown in Table 3 and Table 4:
[0045] The glass composition quality (g) of table 3 embodiment 6-10
[0046]
[0047] The preparation process of the luminescent glass is the same as that in Example 1. Ce in Example 6 3+ The excitation and emission spectra of figure 2 shown. It can be seen from the figure that Ce 3+ The emission spectrum of Dy 3+ The excitation spectra have good overlap and the Ce 3+ The excitation peak of 327nm and Dy 3+ The excitation peaks are the same. indicating the presence of Ce 3+ →Dy 3+ Possibility of energy transfer. The exci...
Embodiment 11-15
[0051] Using analytically pure SiO 2 、H 3 BO 3 、Na 2 CO 3 , chemically pure SrF 2 and 99.99% DyF 3 , CeF 3 As the main raw material, the component molar ratio is SiO 2 : 50, B 2 o 3 : 20, Na 2 O: 18, SrF 2 : 10, DyF 3 : 0.5, CeF 3 : x, the composition of x=0.1,0.3,0.5,0.75,1 (be followed by embodiment 11-15) takes batch by weighing. The quality and luminescent performance parameters of each raw material are shown in Table 5 and Table 6:
[0052] The glass composition quality (g) of table 5 embodiment 11-15
[0053]
[0054] The preparation process of the luminescent glass is the same as that in Example 1. The emission spectrum of embodiment 11-15 is as Figure 6 shown. Dy 3+ of yellow light, blue light and Ce 3+ The blue-violet light is recombined into white light. Fixed Dy 3+ concentration, by adjusting the Ce 3+ The density realizes the adjustment of color coordinates.
[0055] The luminous performance parameter of table 6 embodiment 11-15
[0056]...
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