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A kind of sulfide green fluorescent powder and its preparation method and light-emitting device using the fluorescent powder

A green fluorescent powder and light-emitting device technology, which is applied in chemical instruments and methods, light-emitting materials, semiconductor devices, etc., can solve the problem of low fluorescent pink domain, and achieve high light efficiency, good temperature performance, and uniform distribution.

Active Publication Date: 2021-02-12
DONGTAI TIANYUAN FLUORESCENT MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The backlight source of existing LED products generally adopts YGG or LuAG phosphors, the fluorescent pink color density is not high, the highest can only reach 98%, and the intensity generally reaches 95%

Method used

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  • A kind of sulfide green fluorescent powder and its preparation method and light-emitting device using the fluorescent powder
  • A kind of sulfide green fluorescent powder and its preparation method and light-emitting device using the fluorescent powder
  • A kind of sulfide green fluorescent powder and its preparation method and light-emitting device using the fluorescent powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047]According to chemical formula Ca1Mg0.01Ga2.2S4.4Se0.05: 0.06Eu, 0.0005Er to calculate the ratio of raw materials, weigh out 100.09 grams of calcium carbonate, 0.84 grams of magnesium carbonate, 206.18 grams of gallium oxide, 5.55 grams of selenium oxide, 10.56 grams of europium oxide, and 0.096 grams of erbium oxide according to the ratio. Use 10mol / L Dissolve the nitric acid, and add excess ammonium bicarbonate to precipitate the solid32-Calculated as NO3-In total, the molar ratio between the two is 1.05:1, the same below), filter, clean with deionized water, and dry, finally add 141.11 grams of sulfur, flux: 15 grams of magnesium chloride, 30 grams of strontium bromide, and obtain the material after thorough mixing and grinding Precursor: Put the material precursor into the buried carbon corundum crucible, pre-fire at 600°C for 2 hours, cool to room temperature and crush to 10-20μm (the same below), clean with deionized water 3 times, and dry; put it in the buried again Burn...

Embodiment 2

[0049]According to the chemical formula Sr1.0Mg0.01Ga2.2S4.4Se0.05: 0.06Eu, 0.0005Er to calculate the ratio of raw materials, weigh 147.63 grams of strontium carbonate, 0.84 grams of magnesium carbonate, 206.18 grams of gallium oxide, 5.55 grams of selenium oxide, 10.56 grams of europium oxide, and 0.096 grams of erbium oxide according to the ratio. Use 10mol / L Dissolve the nitric acid, add excess ammonium bicarbonate solid precipitation, filter, clean with deionized water, and dry. Finally, add 141.11 grams of sulfur, flux: 30 grams of sodium bromide, 2 grams of calcium chloride, and 2 grams of strontium chloride. Fully mix and grind to obtain the material precursor; put the material precursor into the buried carbon corundum crucible, pre-fire at 600°C for 2 hours, cool to room temperature and crush to 10-20μm, rinse with deionized water 3 times, and dry; put it in again Buried in a carbon corundum crucible, burned at 720°C for 8 hours, and finally ball milled with agate balls for ...

Embodiment 3

[0051]According to chemical formula Ba1.0Mg0.01Ga2.2S4.4Se0.05: 0.06Eu, 0.0005Er to calculate the ratio of raw materials, weigh 197.34 g of barium carbonate, 0.84 g of magnesium carbonate, 206.18 g of gallium oxide, 5.55 g of selenium oxide, 10.56 g of europium oxide, and 0.096 g of erbium oxide according to the ratio. Use 10mol / L Dissolve the nitric acid, precipitate with excess ammonium bicarbonate, filter, clean with deionized water, and dry, finally add 141.11 grams of sulfur, flux: 15 grams of potassium iodide, 5 grams of calcium chloride, and thoroughly mix and grind to obtain the material precursor; The material precursor is put into the buried carbon corundum crucible, pre-fired at 600°C for 2 hours, cooled to room temperature and broken to 10-20μm, cleaned with deionized water 3 times, and dried; put into the buried carbon corundum crucible again at 720°C Burn for 9 hours, and finally use agate ball milling for 3 hours to obtain green powder.

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Abstract

A sulfide green fluorescent powder, having the following chemical formula: (Ca1-x-y,Srx,Bay)MdSaSen:zEu, cEr, bR, wherein M is one or more of Mg, Zn, Al, Ga, Gd, La, and Y, and R is one of Ce, Tb, Pr, Bi, Sb, Pb, Sn, and Ge. The sulfide green fluorescent powder has uniformly distributed particles and good stability after being encapsulated, can absorb the blue light emitted by an luminescent element, emits green light, does not absorb the red light emitted by a red luminescent body, and does not cause repeated absorption. Also disclosed is a luminescent apparatus comprising the sulfide green fluorescent powder, having a high luminous efficacy, a gamut level of 102, and a color rendering index of more than 97.

Description

Technical field[0001]The invention relates to a sulfide green fluorescent powder, a preparation method thereof and a light emitting device using the fluorescent powder.Background technique[0002]With the rapid development of the international IT industry, related backlights, display lighting and white LED industries continue to introduce new ones, and product sizes are developing towards diversification and portability. As one of the core components of LED products, backlights are bound to match this development trend. , Committed to product diversification and portability. The backlight of the existing LED products generally uses YGG or LuAG phosphors. The phosphorous pink has a low gamut and can only reach 98% at the highest, and the intensity generally reaches 95%.Summary of the invention[0003]The purpose of the present invention is to provide a sulfide green phosphor and a preparation method thereof.[0004]Another object of the present invention is to provide a light-emitting devi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/84H01L33/48H01L33/50
CPCC09K11/7786H01L33/48H01L33/502
Inventor 胡程王晶尹向南徐达
Owner DONGTAI TIANYUAN FLUORESCENT MATERIALS CO LTD