Blue-purple light or blue light excitation fluorophor, preparation method thereof, and packaged white light diode

A blue light excitation and phosphor technology, applied in the field of white light diodes, can solve the problems of uneven composition, instability and toxic hydrolysis conditions of the phosphor, and achieve the effects of stable color coordinates, high manufacturing efficiency and excellent characteristics

Inactive Publication Date: 2008-05-28
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these phosphors, for example, Sr 3-x SiO 5 :Eu 2+ x , 0

Method used

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  • Blue-purple light or blue light excitation fluorophor, preparation method thereof, and packaged white light diode
  • Blue-purple light or blue light excitation fluorophor, preparation method thereof, and packaged white light diode

Examples

Experimental program
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Effect test

Example Embodiment

[0025] Example 1

[0026] According to the composition of the phosphor and the process flow in Figure 1, take a = 0.0, b = 0.05, c = 0.0, d = 0.0, and e = 0.0. Weigh the analytically pure strontium nitrate with a purity of 99.9% and an average size of 10 Nano SiO 2 Put it into a beaker with the spectrally pure europium nitrate. According to the solid:liquid volume ratio=1:10, add deionized water, mechanically stir, titrate with a 30% nitric acid aqueous solution to pH=1, and stir for 3 hours to obtain a composite silica sol. The composite silica sol is sprayed and granulated, and the compressed air temperature is set to 110°C at the inlet temperature and the dry air volume is 100m 3 / h, the material flow is 1L / h, and the dry gel particles are obtained; the dry gel particles are put into a corundum crucible and pre-fired in a common muffle furnace at a temperature of 600°C for 3 hours, and the pre-fired powder is obtained after natural cooling. Place the crucible containing the pre...

Example Embodiment

[0028] Example 2

[0029] According to the composition of the phosphor and the process flow of Figure 1, take a = 0.1, b = 0.1, c = 0.05, d = 0.0, c: e = 10:1, weigh the analytically pure strontium nitrate and barium nitrate, and their purity 99.9% SiO with an average size of 10 nanometers 2 And spectrally pure Ce with an average size of 50 nanometers 2 O 3 , Analytical pure lithium nitrate and spectrally pure europium nitrate are put into a beaker together. According to the solid:liquid volume ratio=1:15, add deionized water, mechanically stir, titrate with a 30% nitric acid aqueous solution to pH=2, and stir for 5 hours to obtain a composite silica sol. The composite silica sol is sprayed and granulated, and the compressed air temperature is set to an inlet temperature of 150°C, and the amount of dry air is 150m. 3 / h, the material flow is 2L / h, and the dry gel particles are obtained; the dry gel particles are put into a corundum crucible and pre-fired in a common muffle furnace ...

Example Embodiment

[0030] Example 3

[0031] According to the composition of the phosphor and the process flow of Figure 1, take a = 0.0, b = 0.0, c = 0.1, d = 0.0, c: e = 1: 0.05, and weigh the analytically pure strontium nitrate with a purity of 99.9% SiO with an average size of 10 nanometers 2 And spectrally pure Ce with an average size of 50 nanometers 2 O 3 Analyze pure lithium nitrate and put them into a beaker together. According to the solid:liquid volume ratio=1:20, add deionized water, mechanically stir, titrate with a 30% nitric acid aqueous solution to pH=3, and stir for 6 hours to obtain a composite silica sol. The composite silica sol is sprayed and granulated, and the compressed air temperature is set to 200℃ at the inlet temperature and the dry air volume is 200m 3 / h, the material flow is 1.5L / h, and the dry gel particles are obtained; the dry gel particles are put into a corundum crucible and pre-fired in a common muffle furnace at a temperature of 800°C for 6 hours. After natural ...

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Abstract

The invention belongs to the technical field of photoelectric display materials and devices, which relates to a process for manufacturing phosphor excited by royal purple light or blue light and a white diode which is produced by encapsulating the phosphor and a chip. The components of the phosphor includes Sr3-a-bBaaSi1-cO5: bD, cE, dF and eG, wherein D is divalent Eu, E is trivalent Ce, F is element B, G is univalent Li, and a, b, c, d, and e are atom mole numbers, and number range is that 0.0<=a<=0.2, 0.0<=b<=0.2, 0.0<=c<=0.2, 0.0<=d<=0.2 and 0.0<=e<=0.2. According to the components of the phosphor, a compound silica sol is prepared for processing spray granulation to gain xerogel particles, and phosphor particles are gained by microwave high-temperature heating the xerogel particles. The employment of the components of the phosphor and the process for preparation ensures the easy regulating of the size, appearance, optical spectrum, brightness and luminous efficiency of the phosphor particles, thereby realizing mass production. The white diode is gained by encapsulating the phosphor particles and the royal purple light or blue light GaN (Gallium nitride) base chip.

Description

【Technical field】 [0001] The invention belongs to the technical field of photoelectric display materials and devices, and relates to a fluorescent body excited by blue-violet light or blue light, a manufacturing method and a white light diode packaged with the fluorescent body and blue-violet light or blue light GaN-based chip. 【Background technique】 [0002] The current light-emitting mode of white light diodes is that after injecting current, the GaN semiconductor acts as a chip to emit blue light with a wavelength of 460 nanometers, and the blue light is excited by YAG:Ce 3+ The phosphor layer as the main component produces yellow light with a wavelength of 560 nanometers, and the blue light is combined with the yellow light to form white light. GaN-based chips capable of emitting blue-violet or blue light at a wavelength of 400-460 nm have been commercially used. For solid state lighting, white light diodes with high power, high brightness and high color rendering index...

Claims

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Application Information

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IPC IPC(8): C09K11/79H01L33/00H01L33/50
CPCY02B20/181Y02B20/00
Inventor 王达健张培新袁志好彭金辉李岚毛智勇顾铁成姜亚昌陆启飞于文惠印寿根张红梅
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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