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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<x≤1 (CN1745159A), there are still deficiencies: 1) the composition is single, the excitation spectrum, emission spectrum, brightness and luminous efficiency are not easy to adjust, 2) the composition of the phosphor is not uniform, the size , shape and crystallinity are not easy to control
In addition, when using the liquid phase method to prepare rare earth-doped silicate phosphors, the silicon source is usually tetraethyl orthosilicate, which is toxic and the hydrolysis conditions are unstable.

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
Comparison scheme
Effect test

Embodiment 1

[0026] According to the composition of the phosphor and the process flow of accompanying drawing 1, take a=0.0, b=0.05, c=0.0, d=0.0, e=0.0, take by weighing analytically pure strontium nitrate, the purity is 99.9%, and the average size is 10 nano-SiO 2 Put it in a beaker with spectroscopically pure europium nitrate. According to solid: liquid volume ratio = 1: 10, add deionized water, mechanically stir, titrate to pH = 1 with 30% nitric acid aqueous solution, 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 the inlet temperature of 110°C, and the dry air volume is 100m 3 / h, the material flow is 1L / h, to obtain dry gel particles; the dry gel particles are put into a corundum crucible, and pre-fired in an ordinary muffle furnace at a temperature of 600°C for 3 hours, and then naturally cooled to obtain a pre-fired powder. Place the crucible with pre-burned powder in an indu...

Embodiment 2

[0029] According to the composition of phosphor and the technological process of accompanying drawing 1, get a=0.1, b=0.1, c=0.05, d=0.0, c: e=10: 1, take by weighing analytically pure strontium nitrate and barium nitrate, purity 99.9% SiO with an average size of 10 nm 2 and spectrally pure Ce with an average size of 50 nm 2 o 3 , analytically pure lithium nitrate and spectroscopically pure europium nitrate were put into a beaker together. According to solid: liquid volume ratio = 1: 15, add deionized water, mechanically stir, titrate to pH = 2 with 30% nitric acid aqueous solution, 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 at the inlet temperature of 150°C, and the dry air volume is 150m 3 / h, the material flow is 2L / h, to obtain dry gel particles; the dry gel particles are put into a corundum crucible, and pre-fired in an ordinary muffle furnace at a temperature of 70...

Embodiment 3

[0031] According to the composition of phosphor and the technological process of accompanying drawing 1, get a=0.0, b=0.0, c=0.1, d=0.0, c: e=1: 0.05, take by weighing analytically pure strontium nitrate, purity is 99.9% SiO with an average size of 10 nm 2 and spectrally pure Ce with an average size of 50 nm 2 o 3 , analytically pure lithium nitrate, and put them together in a beaker. According to solid: liquid volume ratio = 1: 20, add deionized water, mechanically stir, titrate to pH = 3 with 30% nitric acid aqueous solution, 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 at the inlet temperature of 200°C, and the dry air volume is 200m 3 / h, the material flow is 1.5L / h, to obtain dry gel particles; the dry gel particles are put into a corundum crucible, pre-fired in an ordinary muffle furnace, the temperature is 800 ° C, the time is 6 hours, and the pre-fired powder is o...

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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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