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Ultraviolet-excited oxynitride red-light fluorescent powder and preparation method thereof

A red light phosphor, nitrogen oxide technology, applied in chemical instruments and methods, luminescent materials and other directions, can solve the problems of harsh synthesis conditions, low red light luminous efficiency, etc., achieve good chemical stability and thermal stability, The effect of high luminous brightness and simple equipment

Inactive Publication Date: 2014-12-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Various types of rare earth-doped nitride / oxynitride phosphors have been developed at home and abroad, but the nitride / oxynitride phosphors used in LED lighting still have low red light luminous efficiency and harsh synthesis conditions. Not enough

Method used

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  • Ultraviolet-excited oxynitride red-light fluorescent powder and preparation method thereof
  • Ultraviolet-excited oxynitride red-light fluorescent powder and preparation method thereof
  • Ultraviolet-excited oxynitride red-light fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) According to the chemical formula Ca 2 AlSi 3 o 2 N 5 :0.001Sm 3+ Weigh CaCl according to stoichiometric ratio 2 , AlCl 3 ·6H 2 O, Nano-Si 3 N 4 , SmCl 3 ·6H 2 O, disperse the three chlorides in the above raw materials in a sufficient amount of isopropanol, stir and reflux at a constant temperature of 80°C until completely dissolved, and then add nano-Si 3 N 4 Add to the above solution, continue to reflux and stir at 80°C for 2 hours to form a uniformly dispersed white suspension;

[0019] 2) Weigh the amount of the substance as CaCl 2 15 times of CO(NH 2 ) 2 , disperse it in a sufficient amount of isopropanol, stir and reflux at a constant temperature of 80°C until completely dissolved; CO(NH 2 ) 2 Add the isopropanol solution to the above suspension, and continue to reflux and stir at 80°C for 2 hours to obtain nano-Si 3 N 4 Precipitate of the precursor with the core and the urea complex of chloride as the shell;

[0020] 3) The precipitate was s...

Embodiment 2

[0023] 1) According to the chemical formula Ca 2 AlSi 3 o 2 N 5 :0.005Sm 3+ Weigh CaCl according to stoichiometric ratio 2 , AlCl 3 ·6H 2 O, Nano-Si 3 N 4 , SmCl 3 ·6H 2 O, disperse the three chlorides in the above raw materials in a sufficient amount of isopropanol, stir and reflux at a constant temperature of 70°C until completely dissolved, and then add nano-Si 3 N 4 Add to the above solution, continue to reflux and stir at 70°C for 2 hours to form a uniformly dispersed white suspension;

[0024] 2) Weigh the amount of the substance as CaCl 2 15 times of CO(NH 2 ) 2 , dispersed in a sufficient amount of isopropanol, stirred and refluxed at a constant temperature of 70°C until completely dissolved; CO(NH 2 ) 2 Add the isopropanol solution to the above suspension, and continue to reflux and stir at 70°C for 2 hours to obtain nano-Si 3 N 4 Precipitate of the precursor with the core and the urea complex of chloride as the shell;

[0025] 3) The precipitate wa...

Embodiment 3

[0027] 1) According to the chemical formula Ca 2 AlSi 3 o 2 N 5 :0.01Sm 3+ Weigh CaCl according to stoichiometric ratio 2 , AlCl 3 ·6H 2 O, Nano-Si 3 N 4 , SmCl 3 ·6H 2 O, disperse the three chlorides in the above raw materials in a sufficient amount of isopropanol, stir and reflux at a constant temperature of 90°C until completely dissolved, and then add nano-Si 3 N 4 Add to the above solution, continue to reflux and stir at 90°C for 1 hour to form a uniformly dispersed white suspension;

[0028] 2) Weigh the amount of the substance as CaCl 2 15 times of CO(NH 2 ) 2, disperse it in a sufficient amount of isopropanol, stir and reflux at a constant temperature of 90°C until completely dissolved; CO(NH 2 ) 2 The isopropanol solution was quickly added to the above suspension, and continued to reflux at 90°C for 1 hour to obtain nano-Si 3 N 4 Precipitate of the precursor with the core and the urea complex of chloride as the shell;

[0029] 3) The precipitate was...

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Abstract

The invention discloses an ultraviolet-excited oxynitride red-light fluorescent powder of which the chemical formula is Ca2AlSi3O2N5:xSm<3+>, wherein 0.001<=x<=0.1. The ultraviolet-excited oxynitride red-light fluorescent powder is prepared by combination of an in-situ coprecipitation process and an atmosphere reduction nitrizing process. The preparation technique of the oxynitride red-light fluorescent powder is simple, has the advantage of low sintering temperature, can greatly lower the energy consumption, and is suitable for industrial production. The ultraviolet-excited oxynitride red-light fluorescent powder has the advantages of high luminance, ultraviolet radiation resistance, favorable chemical stability and favorable heat stability; the excitation wavelength is 250-350nm, and the fluorescent powder can be effectively excited by the 282nm InAlGaN deep ultraviolet LED (light-emitting diode); and the emission wavelengths are 602nm and 650nm, and thus, the fluorescent powder can be packaged together with the deep ultraviolet LED to implement red light output.

Description

technical field [0001] The invention relates to an ultraviolet-excited nitrogen oxide red phosphor powder applied to semiconductor lighting and a preparation method thereof, belonging to the technical field of semiconductor lighting. Background technique [0002] Since the 1990s, with the advancement of light-emitting diode technology, especially the development of white LEDs, LEDs have gradually entered the field of general lighting from special light source applications, such as large-screen displays, indicator lights, landscape lighting, and backlights. , which brings greater convenience to people's production and life and improves the quality of lighting. Due to the comprehensive advantages of LEDs such as high brightness, high color rendering index, energy saving, environmental protection, long life, small size, fast response, high reliability, and no radiation, it is considered to be after incandescent lamps, fluorescent lamps and high-intensity gas discharge lamps. T...

Claims

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Application Information

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IPC IPC(8): C09K11/64
Inventor 樊先平万军乔旭升王璠吴一民
Owner ZHEJIANG UNIV
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