Borate matrix fluorescent powder for white-light LED and preparation method of borate matrix fluorescent powder

The technology of phosphor and borate is applied in the preparation of a single-base phosphor for white light LED and the preparation field thereof, which can solve the problems such as difficulty in adjusting and controlling the phosphor powder ratio, decrease in luminous efficiency, and the like, and achieves low synthesis reaction temperature, The effect of good thermal stability and simple process

Inactive Publication Date: 2016-11-23
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the overlap of emission spectra between different phosphors, there is a reabsorption phenomenon, which leads to a decrease in luminous efficiency; and the problem of adjusting the ratio of phosphors is not easy to solve

Method used

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  • Borate matrix fluorescent powder for white-light LED and preparation method of borate matrix fluorescent powder
  • Borate matrix fluorescent powder for white-light LED and preparation method of borate matrix fluorescent powder
  • Borate matrix fluorescent powder for white-light LED and preparation method of borate matrix fluorescent powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] NaSr according to chemical composition 0.89 BO 3 :0.01Ce 3+ ,0.05Sm 3+ ,0.05Tb 3+ Take by weighing 0.5304g anhydrous sodium carbonate Na 2 CO 3 , 1.3144g strontium carbonate SrCO 3 , 0.6474g boric acid H 3 BO 3 , 0.0181g cerium oxide CeO 2 , 0.0872g samarium oxide Sm 2 o 3 , 0.0935g terbium oxide Tb 4 o 7 , into the agate mortar for preliminary mixing. Then add 2 times the volume of acetone, fully grind it in a ball mill jar for 30 minutes, then dry it in a drying oven for 1-5 hours, remove the acetone, transfer the dried raw material to a corundum crucible, and put it in a high-temperature muffle furnace. Calcining at 400-500°C for 10 hours; putting the semi-finished product obtained after the first sintering into an agate crucible for further grinding; Secondary sintering, reducing atmosphere is N 2 and H 2 Mixed gas, the calcination time is 8 hours; after the reaction is completed, naturally cool to room temperature, take out the sample and grind it, ...

Embodiment 2

[0042] NaSr according to chemical composition 0.88 BO 3 :0.01Ce 3+ ,0.05Sm 3+ ,0.06Tb 3+ Take by weighing 0.5307g anhydrous sodium carbonate Na 2 CO 3 , 1.2995g strontium carbonate SrCO 3 , 0.6478g boric acid H 3 BO 3 , 0.0172g cerium oxide CeO 2 , 0.0879g samarium oxide Sm 2 o 3 , 0.1131g terbium oxide Tb 4 o 7 , into the agate mortar for preliminary mixing. Then add 2 times the volume of acetone, fully grind it in a ball mill jar for 30 minutes, then dry it in a drying oven for 1-5 hours, remove the acetone, transfer the dried raw material to a corundum crucible, and put it in a high-temperature muffle furnace. Calcining at 400-500°C for 10 hours; putting the semi-finished product obtained after the first sintering into an agate crucible for further grinding; Secondary sintering, reducing atmosphere is N 2 and H 2 Mixed gas, the calcination time is 8 hours; after the reaction is completed, naturally cool to room temperature, take out the sample and grind it, ...

Embodiment 3

[0045] NaSr according to chemical composition 0.87 BO 3 :0.01Ce 3+ ,0.05Sm 3+ ,0.07Tb 3+ Weigh respectively 0.5306g of anhydrous sodium carbonate Na 2 CO 3 , 1.2849g strontium carbonate SrCO 3 , 0.6466g boric acid H 3 BO 3 , 0.0175g cerium oxide CeO 2 , 0.0879g samarium oxide Sm 2 o 3 , 0.1314g terbium oxide Tb 4 o 7 , into the agate mortar for preliminary mixing. Then add 2 times the volume of acetone, fully grind it in a ball mill jar for 30 minutes, then dry it in a drying oven for 1-5 hours, remove the acetone, transfer the dried raw material to a corundum crucible, and put it in a high-temperature muffle furnace. Calcining at 400-650°C for 10 hours; putting the semi-finished product obtained after the first sintering into an agate crucible for further grinding; Secondary sintering, reducing atmosphere is N 2 and H 2 Mixed gas, the calcination time is 8 hours; after the reaction is completed, naturally cool to room temperature, take out the sample and grind...

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Abstract

The invention discloses borate matrix fluorescent powder for white-light LED and a preparation method of the borate matrix fluorescent powder. The preparation method is characterized in that NaSr1-x-y-zCexSmyTbzBO3 single matrix fluorescent powder is prepared by a high temperature solid phase method, 0<=x<=0.10, 0<=y<=0.40, 0<=z<=0.40, and the raw materials used by the preparation method are high-purity Na2CO3, SrCO3, H3BO3, CeO2, Tb4O7 and Sm2O3. The fluorescent powder can emit white light under ultraviolet excitation, and the purity of white light can be regulated by regulating doping Ce<3+>, Sm<3+> and Tb<3+> ion concentration. The borate matrix fluorescent powder and the preparation method have the advantages that the preparation method is simple in process and low in synthesizing reaction temperature, the chromaticity coordinates of the prepared NaSrBO3:Ce,Sm,Tb fluorescent powder can be regulated by regulating the doping concentration of the Ce<3+>, the Tb<3+> and the Sm<3+>, and the fluorescent powder is high in light emitting efficiency, good in thermal stability and promising in application prospect in white-light LED under ultraviolet excitation.

Description

technical field [0001] The invention belongs to the field of luminescent materials, and in particular relates to the preparation of a single matrix fluorescent powder for white light LEDs and a preparation method thereof. Background technique [0002] Light Emitting Diodes (LED) is a new type of solid-state lighting device developed in recent years. Because of its advantages of high efficiency, long life, energy saving, and no pollution, it has broad application prospects and potential markets, and has attracted widespread attention from all over the world. It is regarded as a green lighting source in the 21st century. [0003] At present, there are two main methods to realize white LED through phosphor conversion mechanism. One is to use blue LEDs with yellow-emitting phosphors to form white light. At present, this kind of solution is very mature in technology and process, and it is the mainstream product of industrialization. However, the white light obtained by this me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/63H01L33/50
CPCY02B20/00
Inventor 陈学元辛茗涂大涛罗文钦朱浩淼
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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