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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI 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 a color rendering index above 95, due to the blue-green color of 490-510nm The lack of spectrum makes it difficult for existing packaging technologies and LED phosphors to achieve a color rendering index of 95-100

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Ba 5.99 Ga 7 al 7 SiO 29 : 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, aluminum oxide, silicon dioxide; then weigh 6% barium fluoride of the total weight of raw materials; mix all raw materials by ball milling, Sieve with a 120-mesh screen; put the mixed raw materials into a tube furnace, and sinter at 1460°C for 8 hours under 100% nitrogen protection; the resulting product is ground and sieved, washed with 10% nitric acid, and then Washed with deionized water and dried to obtain Ba 5.99 Ga 7 al 7 SiO 29 : 0.01Eu blue-green phosphor.

[0023] figure 1 It is the excitation spectrogram of embodiment 1 of the present invention, as figure 1 As shown, it shows that the excitation wavelength of the luminescent material is 300-450nm; figure 2 It is the emission spectrogram of e...

Embodiment 2

[0025] Example 2: Sr 5.99 Ga 2 al 12 SiO 29 : 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, aluminum oxide, silicon dioxide; then weigh 3% barium fluoride of the total weight of raw materials; mix all raw materials by ball milling, Sieve with a 120-mesh screen; put the mixed raw materials into a tube furnace, and sinter at 1480°C for 10 hours under 100% nitrogen protection; the resulting product is ground and sieved, washed with 10% nitric acid, and then After washing with deionized water and drying to obtain Sr 5.99 Ga 2 al 12 SiO 29 : 0.01Eu blue-green phosphor.

Embodiment 3

[0027] Example 3: Sr 5.03 Ba 0.95 Ga 10 al 4 SiO 29 : 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 : 0.02Eu composition and stoichiometric ratio Weigh europium oxide, strontium carbonate, barium carbonate, gallium oxide, aluminum oxide, silicon dioxide; then weigh 1% barium fluoride of the total weight of raw materials; ball mill all 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; Washed, then washed with deionized water and dried to obtain Sr 5.03 Ba 0.95 Ga 10 al 4 SiO 29 : 0.02Eu blue-green phosphor.

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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.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a blue-green LED luminescent material. Background technique [0002] In the field of lighting technology, solid-state lighting, especially white lighting using semiconductor light-emitting diodes (LEDs), has been expected, and extensive research and development has been ongoing. As an emerging illuminant, semiconductor lighting has the advantages of high electro-optical efficiency, small size, long life, low voltage, energy saving and environmental protection, and is the best choice for the next generation of lighting. At present, the mixture of cerium-activated yttrium aluminum garnet (YAG) luminescent material and epoxy resin is mainly coated on the blue LED to generate white light through the principle of complementary color. Or adding nitride red powder to YAG can achieve a color rendering index of more than 85, but because the shortest wavelength of YAG can only reach 520...

Claims

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Application Information

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IPC IPC(8): C09K11/64
CPCC09K11/7734
Inventor 李辉王惠璇唐勇
Owner 广东科煜光电有限公司
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