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[0008] Therefore, relative to YAG:Ce (TAG:Ce), Eu 2+ The activated silicate phosphor has a wider emission, that is to say, its applicability is stronger; but the above-mentioned silicate phosphors are all doped with single rare earth ions, and there is room for further improvement of the luminous intensity; at the same time, From the application point of view, it is necessary to further improve the luminous intensity
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Embodiment 1
[0046] Example 1: BaCO 3 0.315g, SrCO 3 11.546g, SiO 2 2.398g, Eu 2 o 3 0.421g, MgF 2 0.050g, Y 2 o 3 The manufacturing method of 0.270 g is the same as that of the comparative example. The chemical formula is obtained as (Sr 0.98 Ba 0.02 )O 0.5SiO 2 0.01MgF 2 :0.03Eu 2+ , 0.03Y 3+ of fluorescent powder. Its excitation and emission spectra are shown in Figures 1 and 2. It can be seen that the excitation peak of the excitation spectrum is relatively wide, and the excitation effect of light with a wavelength in the range of 300nm-470nm is better, so it is suitable for ultraviolet light, purple light or blue light LED chips and the like. Its main emission peak is at 570nm, and its emission intensity is compared as shown in Table 1. It can be seen that the emission intensity increases significantly after adding Y.
Embodiment 2
[0047] Embodiment 2: take by weighing CaCO 3 0.155g, SrCO 3 11.177g, SiO 2 2.321g, Eu 2 o 3 0.544g, BaF 2 0.203g, Y 2 o 3 0.349g, La 2 o 3 The manufacturing method of 0.252g is the same as that of the comparative example. The chemical formula is obtained as: (Sr 0.98 Ca 0.02 )O 0.5SiO 2 0.015BaF 2 :0.04Eu 2+ , 0.04Y 3+ , 0.02La 3+ Its luminous intensity and emission main peak are shown in Table 1.
Embodiment 3- Embodiment 50
[0049] Except for weighing the raw materials according to the chemical formula composition and stoichiometry of each embodiment in Table 1, the rest of the manufacturing steps are the same as in Example 1, and the chemical composition, emission main peak and relative luminous intensity are shown in Table 1.
[0050] The chemical formula of table 1 embodiment 1-50 and comparative example and its relative luminous intensity
[0051] Example
[0052] 11
[0053] 27
[0054] 42
[0055] It can be seen from Table 1 that from Example 1 to Example 50, the luminous intensity of the phosphor powder after co-doping is obviously improved.
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Abstract
The invention relates to an LED phosphor containing silicon and a production method thereof as well as light-emitting devices made of the phosphor. A chemical formula of the phosphor is AO.aSiO2.bAX2:mEu2+, nR3+, wherein, A is one or a plurality of Sr, Ba, Ca, Mg and Zn, X is one or a plurality of F, Cl, Br, I halogen element(s), R is one or a plurality of Bi, Y, La, Ce, Pr, Gd, Tb and Dy; wherein, a is more than 0.1 and less than 2, b is more than 0.005 and less than 0.08, m is more than 0.005 and less than 0.5, n is more than 0.005 and less than 0.5, m plus n is less than 1. After all the raw materials and reaction flux are grinded and evenly mixed, under deoxidizing atmosphere, the mixture is roasted under high temperature and the phosphor can be obtained after post-treatment. The phosphor of the invention has the advantages of good chemical stability, very wide excitation wavelength that can be adjusted according to requirements, high luminous intensity, simple production method, no pollution and low cost, etc. White light or colorful LED can be produced by uv light, purple light, or blue light LED chips and the phosphor of the invention.
Description
technical field [0001] The invention relates to a silicon-containing LED fluorescent powder, a manufacturing method and a light-emitting device. Background technique [0002] LED is a high-efficiency, low-cost, green solid-state light-emitting device. It has the advantages of safety and easy use, fast luminous response, stable performance, small size, impact resistance, vibration resistance, and long life. It has been used in indicator lights, signal lights, It is widely used in mobile communication equipment and other fields, and is expected to replace incandescent lamps and fluorescent lamps and enter the lighting field. [0003] As far as the working principle of LED light-emitting devices is concerned, the combination of LED chips and phosphors is the simplest. By coating phosphor powder on ultraviolet, violet or blue LED chips, full-color display can be realized, and white light emission can be easily realized according to the principle of color matching. Taking white...
Claims
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