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Fluorescent powder for white light diode and its production method and usage method

A technology of light-emitting diodes and manufacturing methods, applied in the direction of light-emitting materials, chemical instruments and methods, and the use of gas discharge lamps, etc., can solve the problems that the luminous intensity needs to be further improved, achieve shortening of the atomic distance, increase the emission intensity, and improve the transfer effect Effect

Active Publication Date: 2007-12-05
JIANGSU BREE OPTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Ba reported in US6255670 2 (Mg, Zn)Si 2 o 7 : Eu phosphor and its preparation method, and the influence of Mg / Zn ratio on quantum efficiency and synthesis temperature is proposed. This phosphor is a green phosphor excited by ultraviolet light, with stable chemical properties, but the luminous intensity needs to be further improved; The YAG:Ce phosphor powder reported by US5998925 mentions the influence of Y / Gd, Al / Ga ratio on phosphor emission
The produced light-emitting diodes have color rendering problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1 A phosphor powder for white light emitting diodes, the structural formula is: AM x Al 10 o 17 n(Al 2 o 3 ):Eu y , R 2 , where: A is one of Ca, Sr, Ba, or a mixture of two or more, the mixture ratio can be any ratio, M is Zn, Gd, Ca, Hf, La, Si One of them, or a mixture of two or more, the ratio of the mixture can be any ratio, R is one of Dy, Ce, Tb, Pr, or it can be two or more The mixture, the mixture ratio can be any ratio, 0.01x Al 10 o 17 n(Al 2 o 3 ) as matrix, Eu y , R z for the excitation center.

Embodiment 2

[0024] Embodiment 2 A method for manufacturing the phosphor powder for white light emitting diodes according to embodiment 1, comprising:

[0025] The first step is to weigh the raw materials according to the composition of the phosphor powder for white light emitting diodes. The raw materials are simple substances of elements A, M, Al, Eu, and R, or oxides of A, M, Al, Eu, and R. It can be a salt of A, M, Al, Eu, R, and the proportion of A, M, Al, Eu, R in the raw material is the same as that in the structural formula of the phosphor powder for white light emitting diodes, wherein A is Ca, Sr, Ba At least one of (if multiple, its proportioning can be any proportioning), M is at least one of Zn, Gd, Hf, La, Si (if it is multiple, its proportioning can be any proportioning ), R is at least one of Dy, Ce, Tb, Pr (if multiple, its proportioning can be any proportioning);

[0026] In the second step, the alkaline earth metal halide ( For example, it can be selected as calcium ch...

Embodiment 3

[0031] Example 3 A method of using phosphor powder for white light emitting diodes. The phosphor powder of the present invention is coated on chips of blue light, ultraviolet light or near ultraviolet light emitting diodes by a coating method to form an electric light source. The manufacturing method is the same as that of ordinary electric light sources.

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PUM

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Abstract

This invention discloses a kind of fluorescence powder used in white light e, whose constitutional formula is : AMXAl10O17.n(Al2O3): Euy, Rz. This invention also discloses a method for manufacturing a kind of fluorescence powder, which is : Firstly, weight up raw materials according to the constitutional formula of fluorescence powder, then weight up secondary solvent that is 10-100 mole percent of raw materials, and mix raw materials with secondary solvent; after these, roast above mixture in the air, and reduction calcinate and final treat to get luorescence powder used in white light light-emitting diode. This invention also discloses a method for mking use of the luorescence powder, and execute electric light source by using the a sort of blue light, ultraviolet or near ultraviolet slice and light-emitting diod luorescence powder as raw materials. The production attained by this invention has stable chemical property and high luminous intensity, and its manufacture technology is simple. The produced electric light source produced has high lighting brilliance and good color rendering.

Description

technical field [0001] The invention relates to a fluorescent powder and a manufacturing method and a using method thereof, in particular to a fluorescent powder for a white light emitting diode and a preparing method and a using method thereof. Background technique [0002] Light-emitting diodes have been widely used in general lighting, indicator lights, signal lights, displays and other fields due to their advantages such as low current, high room temperature intensity, fast luminous response, stable performance, long life, small size, durability and impact resistance. As a high-efficiency, low-cost solid-state light source, it is expected to replace the existing lighting methods. [0003] At present, there are three main ways to realize light-emitting diodes: one is to coat high-efficiency yellow phosphor powder that can be excited by blue light on the blue light-emitting diode chip, and the blue light and yellow light are mixed to form white light; The LED chip is coat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/80H01L51/54
CPCY02B20/181Y02B20/00
Inventor 缪昌文何锦华蒋建清梁超董岩张超吴直森钟海涛吴竞潘晨
Owner JIANGSU BREE OPTRONICS CO LTD
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