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Light-emitting ceramic and light-emitting device

A technology of luminescent ceramics and luminescent centers, applied in luminescent materials, lasers, phonon exciters, etc., can solve the problems that luminescent ceramics cannot meet the use requirements, the blue light absorption efficiency is reduced, and the light conversion efficiency is low, and the consistency is easy to control. , Improve color rendering, uniform luminous effect

Pending Publication Date: 2018-05-25
APPOTRONICS CORP LTD
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Problems solved by technology

[0003] In the application of laser light sources, since the laser power is much greater than that of LEDs, luminescent ceramics need to withstand higher blue light power density, good heat conduction and uniform luminescence, etc., and luminescent ceramics need to provide yellow light with higher power density to achieve white light. white balance, which makes the traditional luminescent ceramics developed for LEDs unable to meet the requirements of use
[0004] In addition, the YAG fluorescent ceramics in the prior art are prepared by solid-phase sintering or liquid-phase method, the cerium doping amount is very low, and the transmittance is high, which shortens the optical path of the incident excitation light inside the ceramic and makes the blue light Lower absorption efficiency, lower light conversion efficiency

Method used

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  • Light-emitting ceramic and light-emitting device

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Embodiment Construction

[0039] Traditional fluorescent solid packages, such as silica gel packaged phosphor powder, glass packaged luminescent glass, etc., are based on a transparent silicone continuum matrix or glass continuum matrix, and the phosphor powder is distributed in it. When the blue light is incident on the illuminant, the blue light can penetrate the transparent matrix and irradiate on the phosphor particles to perform photoluminescent energy conversion, and the heat generated is mainly transmitted through the continuous structure of the phosphor to the matrix. However, silica gel and glass have the disadvantages of low heat resistance and poor thermal conductivity. When used in a high-power laser light source, the silica gel system will age and become brittle due to high temperature, and even be burned; the heat resistance of the glass system is better. , but the thermal conductivity is low, and the sharp rise in temperature will still cause a significant drop in the efficiency of the ph...

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Abstract

The application discloses light-emitting ceramic and a light-emitting device. The light-emitting ceramic is prepared from the following components: a YAG (Yttrium Aluminum Garnet) substrate, and light-emitting centers and scattering particles uniformly dispersed in the YAG substrate, wherein the light-emitting centers are YAG fluorescent powder particles with the particle diameter being 10-20mu mand doped by lanthanide-series elements; the particle diameter of the scattering particles is 20-50nm; the YAG substrate is YAG ceramic doped by the lanthanide-series elements, and the particle diameter of crystal grains of the YAG substrate is less than that of the crystal grains of the YAG fluorescent powder particles. The light-emitting ceramic disclosed by the application has the advantages ofhigh light-emitting efficiency and applicability to large-power light sources.

Description

technical field [0001] The present application relates to the field of luminescent ceramics, in particular to a luminescent ceramic used for a high-power light source, and a luminescent device using the luminescent ceramic. Background technique [0002] YAG luminescent ceramics are different from YAG (Y 3 al 5 o 12 , yttrium aluminum garnet, abbreviated as YAG) pure-phase ceramics, by doping cerium and other lanthanide elements in YAG, so that a small amount of the element replaces part of the yttrium position, so that the YAG luminescent ceramics can obtain luminescent properties, and the incident The light is converted to light with a longer wavelength. The traditional YAG:Ce luminous ceramics are mainly developed for the luminous characteristics of LEDs. Since the power of LED chips is small, the power density of blue light emitted is low, so the power density of yellow light required to synthesize white light is not high. Therefore, it is developed for LEDs. The lumi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/44H01S5/30
CPCH01S5/30H01S5/305C04B35/44C04B2235/50C04B2235/9646C04B2235/3217C04B2235/3244C04B2235/3232C04B2235/386C09K11/7774C04B2235/3225C04B2235/3224C04B2235/3229C04B2235/5436C04B2235/5445C04B2235/5454C04B2235/786C04B2235/785C04B2235/781C04B2235/5472C04B2235/783C04B2235/80C04B2235/9653C04B37/023C04B2237/343C04B2237/124C04B2237/407C04B2235/764C09K11/7715G02B1/11H01S3/1643C04B35/78H01L33/502C04B2237/123C04B2235/782C04B2237/125C04B2235/95H01L33/641C04B35/50H01L33/46
Inventor 李乾陈雨叁许颜正
Owner APPOTRONICS CORP LTD
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