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Nitrogen oxide fluorescent powder, preparation method thereof and luminescent device containing the fluorescent powder

A technology of nitrogen oxides and phosphors, applied in chemical instruments and methods, luminescent materials, electrical components, etc., can solve the problems of decreased luminous brightness and poor thermal stability, and achieve low cost, excellent thermal stability, and high color rendering performance effect

Active Publication Date: 2014-06-25
GRIREM ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermal stability of this series of red phosphors is poor, and the luminance of the phosphors decreases rapidly after being heated.

Method used

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  • Nitrogen oxide fluorescent powder, preparation method thereof and luminescent device containing the fluorescent powder
  • Nitrogen oxide fluorescent powder, preparation method thereof and luminescent device containing the fluorescent powder
  • Nitrogen oxide fluorescent powder, preparation method thereof and luminescent device containing the fluorescent powder

Examples

Experimental program
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Embodiment 1

[0040] The chemical formula of this embodiment is 0.999Ca 2.99 (N 1.999 , O 0.001 )·2.997AlN·1.001Si 3 N 4 0.001SiC:0.01Eu. The manufacturing method is to weigh silicon nitride (4N), silicon dioxide (4N), aluminum nitride (4N), calcium nitride (4N), europium nitride (4N), silicon carbide (4N) according to the stoichiometric ratio and metal calcium, and mix them evenly. After the mixed raw materials are kept at 1500°C for 3 hours under a nitrogen-hydrogen atmosphere, the temperature is lowered to below 100°C. After taking them out, they are ground, washed, dried and sieved. deal with. The color coordinates, half-peak width and relative luminous intensity of the obtained phosphor powder are shown in Table 1.

Embodiment 2

[0042] The chemical formula of this embodiment is 0.999Ca 2.99 (N 1.999 , O 0.001 )·2.997AlN·1.001Si 3 N 4 0.01SiC:0.01Eu. The manufacturing method is to weigh silicon nitride (4N), aluminum nitride (4N), aluminum oxide (4N), calcium nitride (4N), europium oxide (4N), calcium carbonate (4N), carbonized Silicon (4N) and fully mixed evenly. After the mixed raw materials were kept at 1500°C for 3 hours under a nitrogen-hydrogen atmosphere and a pressure of 1MPa, the temperature was lowered to below 100°C. After taking them out, they were ground, washed, dried and passed Sieve and other post-processing. The color coordinates, half-peak width and relative luminous intensity of the obtained phosphor powder are shown in Table 1.

Embodiment 3

[0044] The chemical formula of this embodiment is 0.999Ca 2.99 (N 1.999 , O 0.001 )·2.997AlN·1.001Si 3 N 4 0.08SiC:0.01Eu. Weigh silicon nitride (4N), aluminum nitride (4N), aluminum nitrate (4N), aluminum oxide (4N), calcium nitride (4N), calcium oxide (4N), europium oxide (4N) according to the stoichiometric ratio , silicon carbide (4N) and mix well. Its manufacturing method and post-treatment process are basically the same as in Example 1. The color coordinates, half-peak width and relative luminous intensity of the obtained phosphor powder are shown in Table 1.

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Abstract

The invention discloses nitrogen oxide fluorescent powder, a preparation method thereof and a luminescent device containing the fluorescent powder. The chemical formula of the fluorescent powder is mM<3-x / 2-d>(N<2-x>,Ox)*aA<1-y / 3>(N<1-y>,Oy)*bD<3-z / 4>(N<4-z>,Oz)*n(SiC):dR, wherein the M element is one or more of Mg, Ca, Sr and Ba; the A element is one or more of B, Al, Ga, La, Gd, Sc and Y; the D element is one or more of Si, Ge and Ti; the R element is one or more of Ce, Eu and Mn, and comprises the Eu certainly; 0<=x<=0.3; 0<=y<=0.3; 0<=z<=0.3; 0

Description

technical field [0001] The invention relates to a nitrogen oxide fluorescent powder with high color rendering and high light efficiency 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 fluorescent powder, 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65C09K11/64H01L33/50
Inventor 刘元红刘荣辉何华强何涛张书生胡运生徐会兵
Owner GRIREM ADVANCED MATERIALS CO LTD
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