Nitride fluorescent powder and preparation method thereof, luminescent device containing fluorescent powder

A technology of nitride phosphors and phosphors, which is applied in the direction of chemical instruments and methods, luminescent materials, electrical components, etc., can solve the problems of demanding equipment, complicated process, and high cost, and achieve easy operation, high luminous efficiency, and low cost Effect

Active Publication Date: 2013-04-17
GRIREM ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the luminous efficiency of nitride phosphors (for example, phosphors disclosed in patent documents EP1104799A1, WO2005 / 052087, CN100340631C, and CN101090953A) still needs to be further improved
On the other hand, the preparation process of this type of phosphor generally requires relatively strict equipment requirements (usually high temperature and high pressure environment), high cost and complicated process

Method used

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  • Nitride fluorescent powder and preparation method thereof, luminescent device containing fluorescent powder
  • Nitride fluorescent powder and preparation method thereof, luminescent device containing fluorescent powder
  • Nitride fluorescent powder and preparation method thereof, luminescent device containing fluorescent powder

Examples

Experimental program
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Effect test

Embodiment 1

[0038] The nitride red phosphor product of the present embodiment, after analyzing the chemical formula of this phosphor is Ca 2.9915 (N 1.999 , O 0.001 )·3.0Al 0.9997 (N 0.999 , O 0.001 )·1.0Si 2.9998 (N 3.999 , O 0.001 )·0.0001Se 1.8 N 2.4 :0.008Eu. The manufacturing method is to weigh silicon nitride (4N), aluminum nitride (4N), calcium nitride (4N), europium nitride (4N), selenium nitride (4N) and metal calcium according to the stoichiometric ratio, and mix Evenly, the mixed raw materials are kept at 1500°C for 3 hours under a nitrogen-hydrogen atmosphere, and then the temperature is lowered to below 100°C. After taking them out, they are subjected to post-processing such as grinding, washing, drying, and sieving. The average particle size of the obtained phosphor is 10 μm, and its excitation spectrum is as follows figure 1 As shown, it can be seen from the figure that there is strong absorption from 325nm to 500nm, which is suitable for ultraviolet, near ultrav...

Embodiment 2

[0040] The nitride red phosphor product of the present embodiment, after analyzing the chemical formula of this phosphor is Ca 2.9915 (N 1.999 , O 0.001 )·3.0Al 0.9997 (N 0.999 , O 0.001 )·1.0Si 2.9998 (N 3.999 , O 0.001 )·0.001Se 1.8 N 2.4 :0.008Eu. Weigh silicon nitride (4N), aluminum nitride (4N), calcium carbonate (4N), europium oxide (4N) and elemental selenium (4N) according to the stoichiometric ratio, and fully mix them uniformly. Its manufacturing method and post-treatment process are basically the same as in Example 1. The color coordinates and relative luminous intensity of the obtained phosphor powder are shown in Table 1.

Embodiment 3

[0042] The nitride red phosphor product of the present embodiment, after analyzing the chemical formula of this phosphor is Ca 2.9915 (N 1.999 , O 0.001 )·3.0Al 0.9997 (N 0.999 , O 0.001 )·1.0Si 2.9998 (N 3.999 , O 0.001 )·0.01Se 1.8 N 2.4 :0.008Eu. Weigh silicon nitride (4N), aluminum nitrate (4N), calcium hydroxide (4N), metal europium (4N) and selenium oxide (4N) according to the stoichiometric ratio, and mix well and evenly. Its manufacturing method and post-treatment process are basically the same as in Example 1. The color coordinates and relative luminous intensity of the obtained phosphor powder are shown in Table 1.

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Abstract

The invention provides a nitride fluorescent powder and a preparation method thereof, and a luminescent device containing the fluorescent powder. The chemical formula of the fluorescent powder is M3-x / 2(N2-x,Ox).AA1-y / 3(N1-y,Oy).bD3-z / 4(N4-z,Oz).cXmNn:dR, wherein the M element comprises one or more of Be, Mg, Ca, Sr, Ba and Zn; the A element comprises one or more of B, Al, Ga, La, Gd, Sc and Y; the D element comprises one or more of Si, Ge and Ti; the X element comprises one or both of Se and Te; the R element comprises one or more of Ce, Eu and Mn; and 0.0001<=x<=0.05, 0.0001<=y<=0.05, 0.0001<=z<=0.05, 2.8<=a<=3.2, 0.8<=b<=1.2, 0.0001<=c<=0.1, 0.001<=d<=0.2, 0.8<=m<=4.2, and 1.8<=n<=4.5. The fluorescent powder provided by the invention has the advantages of high luminescence efficiency and simple and feasible synthesis technique, and can be used for making high-performance luminescent devices independently or in combination with other fluorescent powders.

Description

technical field [0001] The invention relates to a nitride phosphor that can be effectively excited by ultraviolet, violet or blue LED (Light Emitting Diode), a preparation method thereof and a light-emitting device containing the phosphor, belonging to the technical field of semiconductors. Background technique [0002] White light-emitting diodes (white LEDs) have the advantages of low voltage, high luminous efficiency, low energy consumption, long life, and no pollution, and have been successfully applied in the fields of semiconductor lighting and liquid crystal flat panel displays. At present, the realization of white light LED is mainly divided into two types: the first is the combination of three primary colors (red, blue, green) LED chips; Yellow phosphors, or use blue LEDs with green and red phosphors, or use ultraviolet or purple LEDs to excite red, green, and blue phosphors. Among these implementation methods, the combination of blue LED chips with YAG:Ce yellow p...

Claims

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Application Information

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IPC IPC(8): C09K11/88H01L33/50
Inventor 刘元红何华强刘荣辉胡运生何涛
Owner GRIREM ADVANCED MATERIALS CO LTD
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