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Fluorescent powder, preparation and white radiation LED light source using the fluorescent powder thereof

A technology of LED light source and fluorescent powder, which is applied in the field of white LED light source to achieve high utilization rate, long life, and improved luminous efficiency

Inactive Publication Date: 2008-12-10
ZHEJIANG SINGBEE LIGHTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the technical problems existing in the light source in the existing lighting industry, the purpose of the present invention is to provide a phosphor powder for white LED light source

Method used

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  • Fluorescent powder, preparation and white radiation LED light source using the fluorescent powder thereof
  • Fluorescent powder, preparation and white radiation LED light source using the fluorescent powder thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A phosphor powder for white light LED light sources, the chemical equation of the phosphor powder is:

[0029] Gd 4.89 al 3 o 16 : Ce 0.01 Eu 0.1 ;

[0030] The preparation method of the above-mentioned fluorescent powder comprises the following steps:

[0031] 1) Weigh the required fluorescent powder raw materials and flux respectively according to the stoichiometric ratio of the above phosphor powder composition; 2) Mix the raw materials thoroughly, put the mixture into a crucible, and burn it once at 1500°C, 4-10 hours, the process does not allow a reducing atmosphere; 3) continue to burn the crucible with the material at a temperature of about 1600 ° C in a nitrogen / hydrogen mixed gas atmosphere for at least one time, and the time is 2 to 10 hours; 4) burn the The washed powder is washed at least once in deionized water at 70°C-100°C for more than 1 hour, and at the same time, it is fully stirred, and then it is left to stand after stopping stirring to remove ...

Embodiment 2

[0033] A phosphor powder for white light LED light sources, the chemical equation of the phosphor powder is:

[0034] Lu 4.8 B 3 o 16 : Ce 0.05 Dy 0.15 ; Its preparation method is as embodiment 1.

Embodiment 3

[0036] A phosphor powder for white light LED light sources, the chemical equation of the phosphor powder is:

[0037] La 4.65 Ga 3 o 16 : Ce 0.1 mn 0.25 ; Its preparation method is as embodiment 1.

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Abstract

The present invention relates to a white light LED light source, in particular to fluorescent powder, a method for preparing and a white light LED light source for using the same. The chemical equation of the fluorescent powder is R[5-x-y]M[3]O[16]: Ce[x]R'[y], wherein, R is at least one of Y, Gd, Lu, Sc, La and Sm; M is at least one of B, Al, Ga, In, P, Ge and Zn; X is larger than 0.001 and less than 0.8; R' is at least one of Tb, Eu, Dy, Pr and Mn; Y is larger than or equal to 0 and less than 0.3. Additionally, the present invention also discloses the method for preparing and the white light LED light source for using the fluorescent powder. The white light LED light source uses blue light to excite the fluorescent powder to generate yellow light, which is mixed with the blue light emitted by an original blue light LED crystal grain so as to generate white light with high photosynthetic capacity that is suitable for illumination. The color temperature of the light source is between 6000 and 7000K, which does not cause the phenomenon that the light color is excessively blue or excessively yellow, and simultaneously the luminous efficiency reaches 100lm / W. The light source has the advantage of long service life.

Description

technical field [0001] The invention relates to a white LED light source, in particular to a fluorescent powder, a preparation method thereof and a white LED light source using the fluorescent powder. Background technique [0002] Energy shortage is a hot topic in the world today. In the lighting industry, light-emitting diodes (LEDs) are replacing traditional lighting with high energy consumption and short life because of its high efficiency, energy saving, environmental protection, environmental protection, safety, and long life. The first choice, but because of the current bottleneck of LED technology, replacing traditional lighting still needs to overcome some technical difficulties related to the normal operation of LED. In the LED field, red, blue, green, etc. are for beautifying lighting, and only white LEDs can be applied to traditional lighting. With the advancement of technology, the brightness of LED has gradually increased, and the application level of white lig...

Claims

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Application Information

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IPC IPC(8): C09K11/78H01L33/00H01L33/50
Inventor 王元成王丽娜
Owner ZHEJIANG SINGBEE LIGHTING TECH
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