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
6 Cites 0 Cited by

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 ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

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

Technology Topic

Led packagingColor rendering index +8

Image

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

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.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
The average particle size12.0µm
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Similar technology patents

Formula of chemical pigment with enhanced brightness

InactiveCN109401446AGood strengthGood brightnessPigment pastesSolventWater soluble
Owner:钱建英

Polish

InactiveCN105238202AGood brightnessNon-sticky surfaceCoatingsPolishing compositionsChemistryPolish - product
Owner:河南荣光鞋业有限公司

Brightener for VCP electroplating and preparation method thereof

InactiveCN111663156AThe composition of the formula is reasonableGood brightnessFirming agentCitric acid
Owner:惠州市腾达宇科技有限公司

No-secondary light spot LED reflector

PendingCN108662552AGood guidanceGood brightnessCoatingsReflectorsEngineeringLED lamp
Owner:中山雅大光电有限公司

Solid polishing wax block based on modified rice bran wax and preparation method thereof

InactiveCN113621314AHigh hardnessGood brightnessCandle ingredientsPolishing compositionsChlorinated paraffinsRice bran wax
Owner:皇宇奢汇(上海)技术有限公司

Classification and recommendation of technical efficacy words

  • Good thermal stability
  • Good brightness

Halogen-free low-smoke flame-retardant cable material and preparation method thereof

InactiveCN108727738AAvoid mechanical propertiesGood brightnessPlastic/resin/waxes insulatorsPlasticizerAntioxidant
Owner:ZHONGSHAN LVLANG ADDITIVES CO LTD

Preparation method of water-based floor paint and construction process of water-based floor paint

ActiveCN104693926AGood brightnessLong-lasting color retentionCoatingsIonEmulsion
Owner:山东世纪联合新材料科技有限公司

Double-color burnt-out sofa fabric technology

InactiveCN106120136AFluff erectGood brightnessLiquid/gas/vapor treatment of propelled fabricsWarp knittingBurning outDyeing
Owner:ZHEJIANG FAMOUS TEXTILE CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products