Fluorescent material, preparation method thereof and light-emitting device
A fluorescent material and a technology that emits red light. It is applied in the fields of display, optoelectronics, and lighting technology. It can solve the problems of high price, good color rendering, and harsh preparation methods, and achieves improved luminous brightness, improved color rendering performance, and simple preparation. Effect
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[0036] Example 1: Ca 0.8 Li 0.1 MoO 4-x F x : Eu 0.1 Preparation of fluorescent materials
[0037] Weigh various raw materials CaCO according to stoichiometric composition 3 , Li 2 CO 3 , Eu 2 O 3 , MoO 3 , NH 4 F, which is called NH 4 The molar mass of F is 0, 0.01, 0.02, 0.05, 0.08, 0.10, that is, the value of x is 0, 0.01, 0.02, 0.04, 0.08, 0.10. After the above 6 groups of raw materials are fully mixed and uniformly ball-milled, they are put into 99 porcelain crucibles, and kept at 500°C for 5 hours in an air atmosphere, and then heated to 850°C for 4 hours. After the sintered body is cooled, it is crushed, sieved, and classified. The chemical composition in the present invention is Ca 0.8 Eu 0.1 Li 0.1 MoO 4 : NH 4 F's fluorescent material. Of which Ca 0.8 Li 0.1 MoO 3.92 F 0.08 : Eu 0.1 The excitation spectrum of figure 1 As shown, the emission spectra under different excitation lights are as follows figure 2 It shows that its maximum emission is at 615nm, with different c...
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[0038] Example 2: Ca 0.72 Li 0.1 MoO 4-x F x : Eu 0.96 Sm 0.04 Preparation of fluorescent materials
[0039] Weigh various raw materials CaCO according to stoichiometric composition 3 , Li 2 CO 3 , Eu 2 O 3 , MoO 3 , SmO 3 , NH 4 F, which is called NH 4 The molar mass of F is 0, 0.01, 0.02, 0.05, 0.08, 0.10, that is, the value of x is 0, 0.01, 0.02, 0.04, 0.08, 0.10. After the above 6 groups of raw materials are fully mixed and uniformly ball-milled, they are put into 99 porcelain crucibles, and kept at 500°C for 5 hours in an air atmosphere, and then heated to 850°C for 4 hours. After the sintered body is cooled, it is crushed, sieved, and classified. The chemical composition in the present invention is Ca 0.72 Li 0.1 Mo O 4-x F x : Eu 0.96 Sm 0.04 Fluorescent material. Its excitation and emission spectral characteristics are basically the same as those of Example 1. Different content of NH 4 The influence of F on the luminous intensity at 615nm is as image 3 Shown in line 2. ...
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[0040] Example 3: LiMo 2 O 8-x F 2x :Preparation of Eu fluorescent material
[0041] Weigh various raw materials Li according to stoichiometric composition 2 CO 3 , Eu 2 O 3 , MoO 3 , LiF, where the molar mass of LiF is weighed as 0, 0.01, 0.02, 0.05, 0.08, 0.10, that is, the value of x is 0, 0.01, 0.02, 0.04, 0.08, 0.10. After the above 6 groups of raw materials are fully mixed and uniformly ball-milled, they are put into 99 porcelain crucibles, and kept at 500°C for 5 hours in an air atmosphere, and then heated to 850°C for 4 hours. After the sintered body is cooled, it is crushed, sieved, and classified. The chemical composition in the present invention is LiMo 2 O 8-x F 2x : Eu's fluorescent material. Its excitation and emission spectral characteristics are basically the same as those of Example 1. The influence of different content of LiF on the luminous intensity at 615nm is as image 3 As shown in line 3.
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