Near ultraviolet excitation type red phosphor and preparation method thereof

A technology for red phosphors and phosphors, applied in the directions of luminescent materials, chemical instruments and methods, can solve the problems of single preparation method and low luminous intensity, and achieve the effects of unique preparation method, good luminescence performance and easy doping

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

AI Technical Summary

Problems solved by technology

At present, many patented phosphors have defects such as single preparation method and low luminous intensity of the product. Therefore,

Method used

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  • Near ultraviolet excitation type red phosphor and preparation method thereof
  • Near ultraviolet excitation type red phosphor and preparation method thereof
  • Near ultraviolet excitation type red phosphor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] According to the formula (Y 0.9 ,Gd 0.1 ) 0.96 (P 0.1 ,V 0.9 )O 4 : 0.02Eu 3+ ,0.02Bi 3+ Weigh Y separately 2 o 3 (A.R.) 0.216 mol, Eu 2 o 3 (A.R.) 0.005 mol, Bi(NO 3 ) 3 · 5H 2 O (A.R.) 0.01 mol, NH 4 VO 3 (A.R.) 0.45 mol, Gd 2 o 3 (A.R.) 0.024 mol and (NH 4 ) 2 HPO 4 (A.R.) 0.05 mol, and then weigh 1wt% surfactant PEG and 1wt% flux H 3 BO 3 ; put Y 2 o 3 and Eu 2 o 3 Heat and dissolve with an appropriate amount of concentrated nitric acid to form a solution, add Bi(NO 3 ) 3 · 5H 2 O and NH 4 VO 3 , and use a 1:1 water-alcohol mixed solution to form a solution, move the ultrasonically treated solution into a reaction kettle and heat it at 150 ° C for 18 hours, filter it with suction, wash it, and dry it to obtain a precursor; Gd 2 o 3 and (NH 4 ) 2 HPO 4Dissolve in excess dilute nitric acid, and then dry; dissolve the dry product in an appropriate amount of water-alcohol mixture, add the previously prepared precursor and surfact...

Embodiment 2

[0023] According to the formula (Y 0.8 ,Gd 0.2 ) 0.94 (P 0.2 ,V 0.8 )O 4 : 0.02Eu 3+ ,0.04Bi 3+ Weigh Y separately 2 o 3 (A.R.) 0.188 mol, Eu 2 o 3 (A.R.) 0.005 mol, Bi(NO 3 ) 3 · 5H 2 O (A.R.) 0.02 mol, NH 4 VO 3 (A.R.) 0.4 mol, Gd 2 o 3 (A.R.) 0.047 mol and (NH 4 ) 2 HPO 4 (A.R.) 0.1 mol, and then weigh 2wt% surfactant PEG and 1wt% flux BaF 2 ; put Y 2 o 3 and Eu 2 o 3 Heat and dissolve with an appropriate amount of concentrated nitric acid to form a solution, add Bi(NO 3 ) 3 · 5H 2 O and NH 4 VO 3 , and use a 1:1 water-alcohol mixed solution to form a solution, move the ultrasonically treated solution into a reaction kettle and heat it at 160 °C for 16 hours, filter it with suction, wash it, and dry it to obtain a precursor; Gd 2 o 3 and (NH 4 ) 2 HPO 4 Dissolve in excess dilute nitric acid, and then dry; dissolve the dry product in an appropriate amount of water-alcohol mixture, add the previously prepared precursor and surfactant PE...

Embodiment 3

[0025] According to the formula (Y 0.7 ,Gd 0.3 ) 0.94 (P 0.3 ,V 0.7 )O 4 : 0.04Eu 3+ ,0.02Bi 3+ Weigh Y separately 2 o 3 (A.R.) 0.1645 mol, Eu 2 o 3 (A.R.) 0.01 mol, Bi(NO 3 ) 3 · 5H 2 O (A.R.) 0.01 mol, NH 4 VO 3 (A.R.) 0.35 mol, Gd 2 o 3 (A.R.) 0.0705 mol and (NH 4 ) 2 HPO 4 (A.R.) 0.15 mol, and then weigh 3wt% surfactant PEG and 1wt% flux Li 2 CO 3 ; put Y 2 o 3 and Eu 2 o 3 Heat and dissolve with an appropriate amount of concentrated nitric acid to form a solution, add Bi(NO 3 ) 3 · 5H 2 O and NH 4 VO 3 , and use a 1:1 water-alcohol mixed solution to form a solution, move the ultrasonically treated solution into a reaction kettle and heat it at 180°C for 15 hours, filter it with suction, wash it, and dry it to obtain a precursor; Gd 2 o 3 and (NH 4 ) 2 HPO 4 Dissolve in excess dilute nitric acid, and then dry; dissolve the dry product in an appropriate amount of water-alcohol mixture, add the previously prepared precursor and surfact...

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Abstract

The invention relates to a near ultraviolet excitation type red phosphor and a preparation method thereof, and belongs to the technical field of luminescent materials. The phosphor has a structural formula represented by (Y1-x,Gdx)1-a-b(Px,V1-x)O4:aEu<3+>,bBi<3+>; and in the formula, x is greater than 0 and not greater than 0.5, and each of a and b is greater than 0 and lower than 0.1. The design idea of the phosphor is characterized in that Eu<3+> is treated as a luminescent center, and Bi<3+> and the like are added as auxiliary activators; there is an interaction in the luminescence of the phosphor; and the addition of Bi<3+>, Gd<3+>, P<5+> and the like enhances the luminescence performance of a sample, wherein the doping of Gd<3+> can improve the luminescent color purity of the sample, the doping of P<5+> can substantially enhance the luminescence performance, and the doping of Bi<3+> can reduce the fluorescent attenuation time of the sample. The preparation method comprises the following steps: weighing reactant raw materials according to the stoichiometric ratios of all elements in the structural formula, preparing a YVO4:Eu<3+>,Bi<3+> matrix predecessor through using a solvothermal process, doping Gd<3+> and P<5+> through using a sol-gel process, drying the obtained product, grinding the product, adding a flux, carrying out ball milling and uniform mixing, calcining the obtained mixed product in a high temperature furnace, and grinding the obtained product to obtain the required phosphor which is the near ultraviolet excitation type red phosphor and can emit red fluorescence.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a near-ultraviolet excited red fluorescent powder and a preparation method thereof. Background technique [0002] Near-ultraviolet-excited luminescent materials are an important class of photoluminescent functional materials, which have the characteristics of heat resistance, corrosion resistance, high stability, high efficiency, energy saving, and recyclability. Such materials are widely used in devices such as high-pressure mercury lamps, PDP displays, FED field emission displays, and near-ultraviolet excited tricolor white LEDs. The traditional near-ultraviolet excited red phosphor is a sulfide phosphor. In recent years, as phosphors for 3D-PDP and trichromatic white LEDs have become research hotspots, phosphors excited by near-ultraviolet have also attracted more and more attention. For such electron-trapping materials, the luminescence phenomenon ...

Claims

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Application Information

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IPC IPC(8): C09K11/83
Inventor 朱达川蒲勇涂铭旌
Owner SICHUAN UNIV
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