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Fluorescent powder and preparation method thereof, and luminescent device comprising fluorescent powder

A technology of light-emitting devices and phosphors, which is applied in the field of phosphors, can solve the problems of decreased luminous intensity of phosphors and many defects on the surface of phosphors, and achieve the effect of avoiding the reduction of luminous intensity and volatilization

Active Publication Date: 2015-02-11
NINGBO SUNPU OPTO SEMICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned post-treatment process will cause more surface defects of the phosphor, resulting in a decrease in the luminous intensity of the phosphor

Method used

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  • Fluorescent powder and preparation method thereof, and luminescent device comprising fluorescent powder
  • Fluorescent powder and preparation method thereof, and luminescent device comprising fluorescent powder
  • Fluorescent powder and preparation method thereof, and luminescent device comprising fluorescent powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 The chemical composition of the fluorescent powder is Na 2.8 Y 0.11 Ce 0.09 Al 2 Li 2.8 Al 0.2 f 11.4 N 0.2 o 0.4

[0031] Raw materials are NaF (analytical pure), YF 3 (analytical pure), CeF 3 (analytical pure), AlF 3 (analytical pure), AlN (analytical pure), LiF (analytical pure) and Al 2 o 3 (analytically pure), the molar ratio is 2.80:0.110:0.090:1.733:0.200:2.800:0.133. Grind and mix the raw materials and place them in an alumina container (it can also be zirconia or boron nitride), and sinter at a temperature of 1450°C for 4 hours. The sintering atmosphere is a mixture of nitrogen and hydrogen (the sintering atmosphere is a mixture of hydrogen, nitrogen and hydrogen gas, ammonia or carbon monoxide), the sintered powder is taken out from the container, crushed, classified and treated with hydrochloric acid with a molar concentration of 3 moles per liter, and the average particle size of the synthesized phosphor is Adjust the diameter to 15 μ...

Embodiment 2

[0032] Example 2 The chemical composition of phosphor powder is NaY 1.91 Ce 0.09 Al 2 LiAl 2 f 4.4 N 0.4 o 7.2

[0033] Raw materials are NaF (analytical pure), Y 2 o 3 (analytical pure), CeF 3 (analytical pure), AlF 3 (analytical pure), AlN (analytical pure), LiF (analytical pure) and Al 2 o 3 (analytically pure), the molar ratio is 1.000:0.955:0.090:0.710:0.400:1.000:1.445. Grind and mix the raw materials and place them in a zirconia container (it can also be alumina or boron nitride), and sinter at a temperature of 1250°C for 4 hours. The sintering atmosphere is a mixture of nitrogen and hydrogen (the sintering atmosphere can be hydrogen, nitrogen and hydrogen One or more of mixed gas, ammonia or carbon monoxide), the pressure is 3 atmospheres. The sintered powder is taken out from the container, crushed, graded, and treated with hydrochloric acid with a molar concentration of 3 moles per liter, and the average particle size of the synthesized phosphor is adjus...

Embodiment 3

[0034] Example 3 The chemical composition of phosphor powder is NaY 1.91 Ce 0.09 Al 2 LiAl 2 f 5.5 N 1.5 o 5

[0035] Raw materials are NaF (analytical pure), Y 2 o 3 (analytical pure), CeF 3 (analytical pure), AlF 3 (analytical pure), AlN (analytical pure), LiF (analytical pure) and Al 2 o 3 (analytically pure), the molar ratio is 1.000:0.955:0.090:1.077:1.500:1.000:0.716. After grinding and mixing the raw materials, place them in an alumina container (or zirconia or boron nitride), and sinter at a temperature of 1200°C for 4 hours. The sintering atmosphere is a mixture of nitrogen and hydrogen, and the pressure is 3 atmospheres. The sintered powder is taken out from the container, crushed, graded, and treated with hydrochloric acid with a molar concentration of 3 moles per liter, and the average particle size of the synthesized phosphor is adjusted to 15 μm, and then the phosphor is washed repeatedly with distilled water to medium properties, and then put the fl...

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Abstract

The invention discloses fluorescent powder, a preparation method thereof, and a luminescent device comprising the fluorescent powder. The chemical constitution of the fluorescent powder is AXZ3-xAl2LiyE3-y(DmNnO12-m-n), wherein A is one or more elements selected from Na, K, Rb or Cs; Z is one or more elements selected from Ce, Sc, Y, La, Gd, Tb or Lu; E is one or more elements selected from B, Al, In or Ga; D is one or two elements selected from F or Cl; x is no lower than 0 and no higher than 3; y is no lower than 0 and no higher than 3; n is no lower than 0 and no higher than m; m+n is lower than 12; and 2x+2y=m-n. The fluorescent powder provided by the invention has a novel chemical constitution, and has high luminescent intensity. With the fluorescent powder, a phenomenon of charge imbalance is prevented, and thus fluorescent powder luminescent intensity reduction is avoided.

Description

technical field [0001] The invention relates to a fluorescent powder, and also relates to a preparation method of the fluorescent powder and a light-emitting device containing the fluorescent powder, belonging to the technical field of inorganic light-emitting materials. Background technique [0002] LED (Light emitting diode) is a semiconductor device that can convert electrical energy into light energy. Due to the advantages of high efficiency, energy saving, environmental protection, firm structure, long service life and short response time, white LEDs have been widely used in indication, backlight and lighting fields. [0003] In the current common white light LEDs, GaInN chips are often used as the excitation light source. The blue light emitted by the chip excites the phosphor coated on the chip, and the light emitted by the phosphor (YAG:Ce phosphor that can emit yellow light is selected in most product designs) is combined with the unabsorbed blue light in the chip ...

Claims

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Application Information

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IPC IPC(8): C09K11/86H01L33/50
CPCY02B20/00
Inventor 张日光周天亮朱小清林胜王义飞
Owner NINGBO SUNPU OPTO SEMICON
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