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Single matrix white light fluorescent powder for deep ultraviolet LED (Light Emitting Diode) and preparation method thereof

A deep ultraviolet, single-substrate technology, applied in chemical instruments and methods, luminescent materials, gas discharge lamps, etc., can solve problems such as unfavorable practical applications, increased production costs, and insignificant enhancement of the luminous intensity of phosphors. Wide range of excitation, low cost and good consistency

Inactive Publication Date: 2013-07-31
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But Bi 3+ and Y 3+ , La 3+ The effect of co-doping on the enhancement of the luminous intensity of phosphor is not obvious, and the above-mentioned co-doped ions are also relatively expensive metal ions, which increases the production cost while improving the luminous intensity of phosphor, which is not conducive to practical application

Method used

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  • Single matrix white light fluorescent powder for deep ultraviolet LED (Light Emitting Diode) and preparation method thereof
  • Single matrix white light fluorescent powder for deep ultraviolet LED (Light Emitting Diode) and preparation method thereof
  • Single matrix white light fluorescent powder for deep ultraviolet LED (Light Emitting Diode) and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] A preparation of Zn 0.001 Y 0.989 P 0.2 V 0.8 o 4 : Dy 3+ 0.01 Single-matrix white phosphor method:

[0074] (a) Prepare raw materials B component ZnO, C component Y(NO 3 ) 3 ·6H 2 O, D component Dy 2 o 3 , E component (NH 4 ) 2 HPO 4 , F component NH 4 VO 3 , press n=0, x=0.001, y=0.01, z=0.2, weigh 0.0008gZnO, 3.8gY(NO 3 )3 ·6H 2 O, 0.019g Dy 2 o 3 , 0.264g (NH 4 ) 2 HPO 4 and 0.912g NH 4 VO 3 ;

[0075] (b) ZnO, Y(NO 3 ) 3 ·6H 2 O and Dy 2 o 3 Mix evenly, add 30ml of nitric acid with a concentration of 65% and heat the mixture at 60°C to fully dissolve the mixture to obtain a clear solution A;

[0076] (c) Will (NH 4 ) 2 HPO 4 and NH 4 VO 3 Mix evenly, add 40ml of ammonia water with a concentration of 20% and heat the mixture at 60°C to fully dissolve the mixture to obtain a clear solution B;

[0077] (d) Mix solution A and solution B, heat the mixed solution at 60°C and keep stirring, use NH 3 ·H 2 0 adjusts the pH value of the ...

Embodiment 2

[0080] A preparation of Na 0.001 Zn 0.001 Y 0.899 P 0.8 V 0.2 o 4 : Dy 3+ 0.1 Single-matrix white phosphor method:

[0081] (a) Prepare raw material A component NaNO 3 , B component Zn(OH) 2 , C component Y 2 o 3 , D component Dy(NO 3 ) 3 ·6H 2 O, E components (NH 4 ) 3 PO 4 , F component NH 4 VO 3 , according to n=1, x=0.001, y=0.1, z=0.8, weigh 0.0009g NaNO 3 , 0.001g Zn(OH) 2 , 1.02g Y 2 o 3 , 0.457gDy(NO 3 ) 3 ·6H 2 O, 1.192g (NH 4 ) 3 PO 4 and 0.228g NH 4 VO 3 ;

[0082] (b) NaNO 3 , Zn(OH) 2 , Y 2 o 3 and Dy(NO 3 ) 3 ·6H 2 O mixed evenly, adding 30ml of nitric acid with a concentration of 65% and fully dissolving the mixture under heating at 60°C to obtain a clear solution A;

[0083] (c) Will (NH 4 ) 3 PO 4 and NH 4 VO 3 Mix evenly, add 40ml of ammonia water with a concentration of 20% and heat the mixture at 60°C to fully dissolve the mixture to obtain a clear solution B;

[0084] (d) Mix solution A and solution B, heat the m...

Embodiment 3

[0087] A kind of preparation K 0.004 Zn 0.001 La 0.969 P 0.1 V 0.9 o 4 : Dy 3+ 0.03 Single-matrix white phosphor method:

[0088] (a) Prepare raw material G component K 2 CO 3 , H component ZnCO 3 , I component La 2 o 3 , J component Dy 2 o 3 , K component P 2 o 5 , L component V 2 o 5 , according to n=4, x=0.001, y=0.03, z=0.1, weigh 0.0028g K 2 CO 3 , 0.0013g ZnCO 3 , 1.58g La 2 o 3 , 0.057g Dy 2 o 3 , 0.071g P 2 o 5 and 0.819g V 2 o 5 ;

[0089] (b) K 2 CO 3 , ZnCO 3 , La 2 o 3 、Dy 2 o 3 ,P 2 o 5 and V 2 o 5 , after fully grinding and mixing evenly, calcining at 1300°C for 5 hours, cooling to room temperature, taking out the material and grinding it to obtain single-matrix white light phosphor for deep ultraviolet LED.

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Abstract

The invention relates to white light fluorescent powder for deep ultraviolet LED (Light Emitting Diode), which has the chemical formula of AnxBxRE1-x-yPzV1-zO4:Dy<3+>y, wherein the RE is rare earth ions of Y<3+>, La<3+>, Gd<3+> and Lu<3+>; the A is alkali metal ions of Li<+>, Na<+> and K<+>; the B is transition metal ions of Zn<2+> and Cd<2+>; n is larger than or equal to 0 and less than or equalto 4; x is larger than or equal to 0 and less than or equal to 0.4; y is larger than or equal to 0 and less than or equal to 0.3; and z is larger than or equal to 0 and less than or equal to 1. A chemical coprecipitation method is adopted to dissolve the raw materials containing corresponding negative ions and positive ions into solutions, and the solutions are mixed to generate precipitates which are washed, dried and calcined; or a solid-phase reaction method is adopted to calcine the raw materials subjected to mixing and fully grinding to obtain single phase fluorescent powder with the same structure to the crystal structure of the matrix (RE(P, V)O4). The invention has the advantages that the luminous intensity is enhanced through the synergic sensitization of the alkali metal ions and the transition metal ions; and a wide strong excitation band is formed in the range from 250 to 350nm.

Description

technical field [0001] The invention belongs to the technical field of photoluminescent materials, and relates to a single-matrix white light fluorescent powder for deep ultraviolet LEDs and a preparation method. The material emits white light under ultraviolet excitation, and is used for ultraviolet-excited white light LEDs and fluorescent lamps. Background technique [0002] Dy excited by ultraviolet light 3+ Activate rare earth vanadium phosphate (abbreviated as RE(PV)O 4 : Dy 3+ ) has two characteristic emissions near 483nm and 573nm, and good white light can be obtained after recombination. As a single-matrix luminescent material, it can avoid the phenomenon of impurity in light color caused by uneven distribution of three primary color phosphors during packaging. [0003] Luminous intensity is an important indicator of phosphor performance. For rare earth vanadium phosphate phosphors, the usual way to increase the luminous intensity of phosphors is to increase the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/83
CPCY02B20/181Y02B20/00
Inventor 何毓阳宋衍滟赵麦群李峰赵高扬高飞山张子富
Owner XIAN UNIV OF TECH
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