Fluorescent material and its preparing method

A technology of fluorescent materials and light-emitting components, which is applied in the direction of light-emitting materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc., and can solve problems such as difficult synthesis, narrow light-emitting spectrum, and difficult large-scale adjustment

Inactive Publication Date: 2007-01-24
吕宗昕
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low quantum efficiency of the current yttrium aluminum garnet phosphor, the blue light generated by the LED cannot be effectively utilized, thus deriving the problem of insufficient brightness
[0006] According to the existing research results, although yttrium aluminum garnet phosphor powder has been applied, it is quite difficult to synthesize because the required reaction temperature is as high as 1500°C-1700°C, and the luminous brightness still needs to be improved.
On the other hand, the main peak of luminescence of yttrium aluminum garnet phosphor is only around 550 to 570nm, the luminescence spectrum is narrow, and it is not easy to adjust it greatly, especially in the red light range, there is a problem of insufficient color rendering
Therefore, there is still a certain gap between the application of yttrium aluminum garnet phosphor powder and the actual needs

Method used

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  • Fluorescent material and its preparing method
  • Fluorescent material and its preparing method
  • Fluorescent material and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Mix the aqueous solution of strontium nitrate, barium nitrate, sodium nitrate, and europium nitrate with the alcohol solution of tetraethoxysilane, and adjust the molar ratio of strontium ions: barium ions: sodium ions: europium ions: silicon ions to be 2.82:0.08 : 0.05: 0.05: 1, make it evenly mixed, after heating and drying, the dry powder is calcined at 800°C for 3 hours. The calcined powder is then mixed with fluxing agent strontium chloride, the mixing molar ratio of strontium chloride and calcined powder is 0.1:1, and the molar ratio of strontium ion: barium ion: sodium ion: europium ion: silicon ion in the mixed powder is 2.92:0.08:0.05:0.05:1. Put the above mixed powder in reducing atmosphere (N 2 with H 2 Flow volume ratio is 95%: 5%) calcined at 1400 ° C for 4 hours, the chlorine component volatilizes at high temperature, and the europium ion is divalent after the reaction, and Sr 2.92 Ba 0.08 Na 0.05 Eu 0.05 SiO 5.075 Phosphor powder. The fluorescent ...

Embodiment 2

[0031] The aqueous solution of strontium nitrate, potassium nitrate and europium nitrate is mixed with the alcohol solution of tetraethoxysilane (tetraethoxysilane), and the molar ratio of strontium ions: potassium ions: europium ions: silicon ions is 2.54: 0.04: 0.42: 1, so that It is mixed evenly, and after heating and drying, the dry powder is calcined at 900°C for 2 hours. The calcined powder is then mixed with fluxing agent strontium chloride, the mixing molar ratio of strontium chloride and calcined powder is 0.3:1, and the molar ratio of strontium ion: potassium ion: europium ion: silicon ion in the mixed powder is 2.84:0.04 :0.42:1. Put the above mixed powder in reducing atmosphere (N 2 with H 2 Flow volume ratio is 95%: 5%) calcined at 1400 ° C for 4 hours, the chlorine component volatilizes at high temperature, and the europium ion is divalent after the reaction, and Sr 2.84 K 0.04 Eu 0.42 SiO 5.28 Phosphor powder. The fluorescent material is analyzed by X-ray...

Embodiment 3

[0033] Mix the aqueous solution of strontium nitrate, magnesium nitrate, potassium nitrate, bismuth nitrate, and europium nitrate with the alcohol solution of tetraethoxysilane to control strontium ions: magnesium ions: potassium ions: bismuth ions: europium ions: silicon ions The molar ratio is 2.58:0.08:0.07:0.07:0.2:1, so that they are mixed uniformly, and after heating and drying, the dry powder is calcined at 880°C for 4 hours. The calcined powder is then mixed with flux ammonium chloride, the mixing molar ratio of ammonium chloride and calcined powder is 0.1:1, strontium ion: magnesium ion: potassium ion: bismuth ion: europium ion: silicon ion in the mixed powder The molar ratio is 2.58:0.08:0.07:0.07:0.2:1. Put the above mixed powder in reducing atmosphere (N 2 with H 2 Flow volume ratio is 95%: 5%) calcined at 1450 ° C for 3 hours, the chlorine component volatilizes at high temperature, and the europium ion is divalent after the reaction, and Sr 2.58 Mg 0.08 K 0.0...

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PUM

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Abstract

The fluorescent material has the composition of (SraMbNcLd)SiOn, where, M is one or several selected from Mg, Ca, Ba, Zn, Li, Na and K; N is one or several selected from Li, Na and K; L is one or several selected from Mn, Cu, Sn, Sb, Bi, Pb and RE elements; a has the selection range of 2.5-3.5; b has the selection range of 0.001-0.5; c has the selection range of 0.001-0.5; d has the selection range of 0.001-0.5; and n has the selection range of 4.7-5.5. The present invention also provides the preparation process of the fluorescent material and the LED, planar display and other light emitting devices with the fluorescent material.

Description

technical field [0001] The invention relates to a novel fluorescent material, which can be applied to light-emitting diodes and other light-emitting components. The invention also relates to a preparation method of the fluorescent material. Background technique [0002] White light-emitting diodes are a new type of lighting equipment that is different from traditional light sources. Since Edison invented the incandescent light bulb, various lighting devices have come out one after another, making human life more comfortable and convenient. With the maturity and breakthrough of manufacturing technology, Light Emitting Diode (LED), which can directly convert electric energy into light energy, has become a light-emitting component that combines the advantages of many manufacturers, and it also makes LED become the lighting source of tomorrow in the 21st century. star. LED is a light source made of semiconductor technology, and the wavelength of light emitted by it covers inf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/79H01L51/30
Inventor 吕宗昕
Owner 吕宗昕
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