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Red fluorescent powder, its preparation method and light-emitting device adopting the same

A technology of red phosphors and light-emitting devices, which is applied to phosphor layers, light-emitting materials, chemical instruments and methods, etc., can solve the problems affecting the full-color display quality of images, the effect of PDP brightness, and low light-emitting efficiency, and achieve excellent light-emitting characteristics, The effect of improving quantum efficiency and brightness, and simple synthesis method

Inactive Publication Date: 2013-04-24
GRIREM ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the key materials used in PDP-type 3D displays is phosphor powder, and the PDP red powder currently used is mainly (Y, Gd)BO 3 :Eu 3+ and Y 2 o 3 :Eu 3+ Two kinds, where (Y, Gd)BO 3 :Eu 3+ The relative luminous efficiency is high, but the main emission peak is at 593nm, and the color purity is lower than the color TV broadcasting standard formulated by the National Television Standards Committee (NTSC), so it greatly affects the quality of full-color image display; , Y 2 o 3 :Eu 3+ The main emission peak is at 611nm, the color purity is better, but the luminous efficiency is much lower than that of (Y, Gd)BO 3 :Eu 3+ , so that the brightness of the PDP is affected

Method used

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  • Red fluorescent powder, its preparation method and light-emitting device adopting the same
  • Red fluorescent powder, its preparation method and light-emitting device adopting the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The chemical composition of the red fluorescent powder of the present embodiment is: Y 2 o 3 0.1B 2 o 3 0.5P 2 o 5 0.5V 2 o 5 0.02SrCl 2 :0.05Eu 3+ . Its manufacturing method is to weigh Y according to the stoichiometric ratio 2 o 3 (4N), Eu 2 o 3 (4N), NH 4 VO 3 (4N) and (NH 4 ) 2 HPO 4 (4N), H 3 BO 3 (AR), SrCl 2 (AR), after the above raw materials are ground and mixed evenly, first keep warm at 1300°C for 5 hours, take out after cooling, and after grinding again, keep warm at 1100°C for 3 hours, and the obtained product is crushed, washed with water, sieved, and dried to obtain the product.

Embodiment 2

[0044] The chemical formula of the red fluorescent powder of the present embodiment is: Y 2 o 3 0.05Al 2 o 3 0.5P 2 o 5 0.5V 2 o 5 0.02SrCl 2 :0.05Eu 3+ . Its manufacture method is identical with embodiment 1.

Embodiment 3-28

[0046] According to the chemical formula composition and stoichiometric ratio of each embodiment in Table 1, the raw materials were weighed, and the corresponding phosphor powder was prepared according to the method of Example 1. The chemical formula and relative luminous intensity of the phosphor powder obtained are shown in Table 1.

[0047] Table 1 Chemical formulas of phosphors in Examples 1 to 30 and their relative luminous intensity under vacuum ultraviolet (147nm) excitation

[0048]

[0049]

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Abstract

The invention relates to a red fluorescent powder, its preparation method and a light-emitting device adopting the fluorescent powder. The fluorescent powder has a chemical formula of: Y2O3.aA2O3.bP2O5.cV2O5.nMX2:mEu3<+>, wherein A is at least one of B, Al and Ga; M is Sr, or at least one of Mg, Ca and Ba as well as Sr; X is at least one of F, Cl and Br; and also, a is larger than 0 and smaller than or equal to 0.5, b is larger than 0 and is smaller than or equal to 1, c is larger than 0 and is smaller than 1, the sum of b and c is larger than or equal to 0.8 and is smaller than or equal to 1, n is larger than 0 and is smaller than or equal to 0.05, and m is larger than 0 and is smaller than or equal to 0.5. The raw materials are fully mixed according to the chemical formula, the obtained mixture is calcinated at high temperature, and after a post-treatment, the red fluorescent powder can be obtained. The prepared fluorescent powder can emit a strong red light under vacuum ultraviolet excitation, the emission dominant wavelength at 619nm, the color purity is high, and the emission intensity is high. The fluorescent powder provided in the invention can be combined with other types of fluorescent powder to make high performance light-emitting devices.

Description

technical field [0001] The invention relates to a red fluorescent powder, a preparation method thereof and a light-emitting device using the fluorescent powder, belonging to the technical field of light-emitting materials. Background technique [0002] Color plasma flat panel display (PDP) type 3D display has the advantages of fast response, high contrast, wide viewing angle and dynamic and realistic display effect, etc., showing a rapid growth trend, making PDP display technology and industry very likely to catch up with 3D display technology developed rapidly. One of the key materials used in PDP-type 3D displays is phosphor powder, and the PDP red powder currently used is mainly (Y, Gd)BO 3 :Eu 3+ and Y 2 o 3 :Eu 3+ Two kinds, where (Y, Gd)BO 3 :Eu 3+ The relative luminous efficiency is high, but the main emission peak is at 593nm, and the color purity is lower than the color TV broadcasting standard formulated by the National Television Standards Committee (NTSC),...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/86H01J11/42H01J17/04
Inventor 刘荣辉徐会兵何华强张书生胡运生何涛
Owner GRIREM ADVANCED MATERIALS CO LTD