Blue-green LED (light emitting diode) light-emitting material

A luminescent material, blue-green technology, applied in the field of materials, can solve the problems of lack of spectrum, LED phosphors are difficult to achieve color rendering index, etc., and achieve good thermal stability and good brightness

Active Publication Date: 2017-07-25

广东科煜光电有限公司

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AI-Extracted Technical Summary

Problems solved by technology

[0003] At present, the technology of using blue, purple or ultraviolet LEDs with YAG yellow-green phosphors and nitride red powders to produce high-color white light is relatively mature, but for LED packages with ...

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Abstract

The invention relates to a blue-green LED (light emitting diode) light-emitting material. A chemical structural formula of the material is M6-x(GayAl1-y)14SiO29:xEu, wherein M refers to at least one or more of group-II alkaline-earth metal elements, x is larger than or equal to 0.001 and smaller than or equal to 1, and y is larger than or equal to 0 and smaller than or equal to 1. An emission waveband of the synthesized target light-emitting material is 490-510nm, the deficiency of spectrum at a blue-green light wave band in existing LED packaging is effectively filled, and the synthesized target light-emitting material is high in luminance and heat stability. In addition, after the synthesized target light-emitting material is matched with other light-emitting materials to obtain LED lamps by packaging, a color rendering index can reach 95 or above.

Application Domain

Luminescent compositions

Technology Topic

Led packagingColor rendering index +8

Image

Examples

Experimental program(5)

Example Embodiment

[0021] Example 1: Ba 5.99 Ga 7 Al 7 SiO 29 :The preparation example of 0.01Eu luminescent material

[0022] According to the chemical formula Ba 5.99 Ga 7 Al 7 SiO 29 : 0.01Eu composition and stoichiometric ratio Weigh europium oxide, barium carbonate, gallium oxide, alumina, silicon dioxide; then weigh 6% barium fluoride of the total weight of the raw materials; after ball milling and mixing all the raw materials, Sieving with a 120-mesh screen; put the mixed raw materials into a tube furnace, sintering at 1460°C for 8 hours under the protection of 100% nitrogen; the resulting product is ground and sieved and washed with 10% nitric acid by mass concentration. After washing with deionized water and drying to obtain Ba 5.99 Ga 7 Al 7 SiO 29 : 0.01Eu blue-green phosphor.

[0023] figure 1 Is the excitation spectrum of Example 1 of the present invention, such as figure 1 As shown, it shows that the excitation wavelength of the luminescent material is 300-450nm; figure 2 Is the emission spectrum of Example 1 of the present invention, such as figure 2 As shown, the emission wavelength of the luminescent material is 491nm; image 3 Is the SEM spectrum of Example 1 of the present invention, such as image 3 As shown, it shows that the main morphology of the luminescent material is nearly spherical, and the average particle size is 12 μm;

[0024] Figure 4 This is the thermal stability diagram of Example 1 of the present invention, such as Figure 4 As shown, it shows that the luminescent material has higher thermal stability, and the luminous efficiency is only reduced by 10% after 225h accelerated aging experiment.

Example Embodiment

[0025] Example 2: Sr 5.99 Ga 2 Al 12 SiO 29 :The preparation example of 0.01Eu luminescent material

[0026] According to the chemical formula Sr 5.99 Ga 2 Al 12 SiO 29 : 0.01Eu composition and stoichiometric ratio Weigh europium oxide, strontium carbonate, gallium oxide, alumina, silicon dioxide; then weigh 3% barium fluoride of the total weight of the raw materials; after ball milling and mixing all raw materials, Sieved with a 120-mesh screen; put the mixed raw materials into a tube furnace and sinter at 1480°C for 10 hours under the protection of 100% nitrogen; the resulting product is ground and sieved and washed with 10% nitric acid by mass concentration. Sr is obtained by washing with deionized water and drying 5.99 Ga 2 Al 12 SiO 29 : 0.01Eu blue-green phosphor.

Example Embodiment

[0027] Example 3: Sr 5.03 Ba 0.95 Ga 10 Al 4 SiO 29 :The preparation example of 0.02Eu luminescent material

[0028] According to the chemical formula Sr 5.03 Ba 0.95 Ga 10 Al 4 SiO 29 :The composition and stoichiometric ratio of 0.02Eu Weigh europium oxide, strontium carbonate, barium carbonate, gallium oxide, alumina, silicon dioxide; then weigh 1% barium fluoride of the total weight of the raw materials; ball mill all the raw materials After mixing, sieve with a 120 mesh screen; put the mixed raw materials into a tube furnace and sinter at 1480°C for 10 hours under the protection of 100% argon; the resulting product is ground and sieved with 10% nitric acid by mass concentration Wash, then wash with deionized water and dry to get Sr 5.03 Ba 0.95 Ga 10 Al 4 SiO 29 :0.02Eu blue-green phosphor.

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PUM

Property	Measurement	Unit
The average particle size	12.0	µm
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Good thermal stability
Good brightness

Organic light-emitting compound, organic light-emitting device including the compound, and method of manufacturing the organic light-emitting device

InactiveUS20080100208A1Good thermal stabilitySilicon organic compoundsDischarge tube luminescnet screensOrganic groupPhotochemistry

Owner:SAMSUNG ELECTRONICS CO LTD

High-temperature and High-Salt resisting gel water packing-off method

InactiveCN1888374AGood thermal stabilityIncrease success rateSealing/packingPetroleumEngineering

Owner:PETROCHINA CO LTD

Blue-green LED (light emitting diode) light-emitting material

A luminescent material, blue-green technology, applied in the field of materials, can solve the problems of lack of spectrum, LED phosphors are difficult to achieve color rendering index, etc., and achieve good thermal stability and good brightness

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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