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Fluorescence conversion composite layer, preparation method and white light emitting device

A composite layer and fluorescence technology, applied in the field of lighting, can solve the problems of low laser saturation power and low white light luminescence stability, and achieve the effects of improving laser saturation power, wide luminescence spectrum, and improving luminescence stability.

Pending Publication Date: 2022-05-13
SONGSHAN LAKE MATERIALS LAB +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present application provides a fluorescent conversion composite layer, a preparation method and a white light emitting device. The above fluorescent conversion composite layer is applied to a white light emitting device, which can not only obtain a high color rendering index, but also improve the existing low stability of white light emission and The problem of low laser saturation power

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  • Fluorescence conversion composite layer, preparation method and white light emitting device
  • Fluorescence conversion composite layer, preparation method and white light emitting device
  • Fluorescence conversion composite layer, preparation method and white light emitting device

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preparation example Construction

[0061] The present application also provides a method for preparing the above-mentioned fluorescent conversion composite layer 10, which includes:

[0062] S1. Obtain the fluorescent ceramic layer 12 .

[0063] The fluorescent ceramic layer 12 refers to a layered transparent ceramic obtained by mixing main materials and additives, pre-sintering to remove additives, and sintering. Among them, the molding method can be dry powder pressing, tape casting, grouting molding or 3D printing molding, etc., and the sintering can be high temperature vacuum sintering, discharge plasma sintering, hot pressing sintering, atmosphere sintering, hot isostatic pressing sintering or microwave sintering Wait.

[0064] S2. Mix the second phosphor with non-fluorescent glass powder to obtain a mixed powder.

[0065] The mixing method includes but is not limited to stirring and mixing, and may also be ball milling and other methods, as long as the second phosphor and the non-fluorescent glass powde...

Embodiment 1

[0087] According to the chemical formula (Ce 0.0015 Y 0.9985 ) 3 Al 5 o 12 Accurately weigh 1.9863g of Al 2 o 3 , 2.6415g Y 2 o 3 , 0.0060 g CeO 2 , 0.018g of tetraethyl orthosilicate, ball milled with 4.6518g of absolute ethanol, 0.0186g of oleic acid, 0.2093g of PAG, 0.2093g of BBP, 0.4187g of PVB and 0.0698 of ethylene glycol, and obtained a thickness of 0.6mm by tape casting The biscuit is then insulated at 800°C in the air to remove the organic additives, and then put into a vacuum sintering furnace (10 -4 Pa around), at 1700 ℃ for 10h, to get 0.25mm thick Ce:YAG fluorescent ceramics. Ce:YAG fluorescent ceramic surface SEM morphology is as follows figure 2 As shown, the surface is flat. Its excitation-emission spectrum is as image 3 shown.

[0088] Ce: YAG fluorescent ceramics and 454.7nm blue LED chip packaging light source electroluminescence spectrum such as Figure 4 See Table 1-S1 for relative color temperature, color coordinates, color rendering inde...

Embodiment 2

[0093] S1, the raw materials PbO and B with a molar ratio of 38:46:11:1 2 o 3 , ZnO, SiO 2 After mixing evenly, melt at 1000°C, then pour the melt into an ice-cold crucible for quenching to obtain a glass block, then grind the glass block and pass through a 200-mesh sieve to obtain a non-fluorescent glass powder with a particle size below 75 μm. S2, the red phosphor (Sr, Ca) AlSiN 3 :Eu 2+ Mix evenly with non-fluorescent glass powder to obtain mixed powder, in which (Sr,Ca)AlSiN 3 :Eu 2+ The addition amount is 20wt% of the addition amount of the non-fluorescent glass powder, and then the mixed powder is scraped onto the sapphire sheet or the Ce:YAG fluorescent ceramic sheet provided in Example 1 through a 200-mesh screen, and is heated and quenched at 650°C. Make (Sr,Ca)AlSiN 3 :Eu 2+ The red fluorescent glass layer is fused on the sapphire sheet or the Ce:YAG fluorescent ceramic sheet to form a red fluorescent glass layer / sapphire sheet composite material, and a red fl...

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Abstract

The invention discloses a fluorescence conversion composite layer, a preparation method and a white light-emitting device, and belongs to the field of illumination. The fluorescent conversion composite layer comprises a fluorescent ceramic layer and a fluorescent glass layer which are arranged in a laminated manner, the fluorescent glass layer is sintered on the surface of the fluorescent ceramic layer, the fluorescent ceramic layer contains a first fluorescent body which is excited by the exciting light to emit first emission light, and the fluorescent glass layer contains a second fluorescent body which is excited by the exciting light to emit second emission light; any one of the first emission light and the second emission light is red light or cyan-red light, and the other one is yellow-green light. When the fluorescence conversion composite layer is applied to the white light emitting device, not only can a high color rendering index be obtained, but also the problems of low white light emitting stability and low laser saturation power in the prior art can be solved.

Description

technical field [0001] The present application relates to the lighting field, in particular to a fluorescent conversion composite layer, a preparation method and a white light emitting device. Background technique [0002] Solid-state lighting technology relies on semiconductor electroluminescent materials and fluorescent conversion materials. It is the third generation of electric lighting technology after incandescent lamps and gas discharge lamps. It has the advantages of compact structure, high efficiency, long life, energy saving and environmental protection, and intelligent control. . According to electroluminescent materials, solid-state lighting includes LED (light-emitting diode) lighting and LD (laser diode) lighting. Since the realization of white light LED in 1997, LED lighting has gradually entered the traditional incandescent and fluorescent lighting markets. With the development and utilization of fluorescent conversion materials such as fluorescent ceramics ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/50H01S5/00C09K11/80C09K11/64C09K11/61
CPCH01L33/505H01L33/504H01L33/508H01S5/0087C09K11/7774C09K11/77348C09K11/617H01L2933/0041
Inventor 麻朝阳李英魁曹永革申小飞
Owner SONGSHAN LAKE MATERIALS LAB