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Wavelength conversion element and its preparation method, illumination source

A technology of wavelength conversion element and laser light source, which is applied in the direction of light source, lighting device, lighting and heating equipment, etc., can solve the problems of uneven mixing of blue light and yellow light, large difference in etendue, single luminous wavelength, etc., and achieve improvement The effects of uneven color, good optical performance, and high color rendering index

Active Publication Date: 2022-04-12
YLX INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two types of ceramic fluorescent materials have good heat resistance, and still have high luminous efficiency at higher temperatures, but there are also problems such as single luminous wavelength, which is not conducive to obtaining white lighting with high color rendering index.
In addition, since the blue light component in the white light of the above scheme comes from the laser light source, and the yellow light component comes from the fluorescent material, the difference in etendue between the two is large, and there is a phenomenon of uneven mixing of blue light and yellow light in the output white light

Method used

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  • Wavelength conversion element and its preparation method, illumination source
  • Wavelength conversion element and its preparation method, illumination source
  • Wavelength conversion element and its preparation method, illumination source

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Embodiment 1

[0029] In this embodiment, the RE is Ce, that is, the first phase RE 3+ :Al 2 o 3 The crystal phase is the first phase Ce 3+ :Al 2 o 3 crystal phase, the wavelength conversion element is Ce 3+ :YAG and Ce 3+ :Al 2 o 3 Composed of multiphase ceramics, where the first phase Ce 3+ :Al 2 o 3 The molar ratio of Ce to (Ce+Al) in the crystal phase is 0.02-0.1, the second phase Ce 3+ : the mol ratio of Ce and (Ce+Al) in the YAG crystal phase is 0.001-0.1, and the Ce 3+ :Al 2 o 3 and Ce 3+ : The molar ratio of YAG is 0.2-5.

[0030] figure 2 It is the emission spectrum of the first phase under the excitation of 375nm excitation light in Example 1 of the present invention. Such as figure 2 As shown, the excitation light source is selected as a 375nm ultraviolet laser, and the laser light source emits excitation light with a first wavelength of 375nm and is incident on the wavelength conversion element, which is absorbed by the first phase Ce in the wavelength convers...

Embodiment 2

[0038] In this embodiment, the RE is Yb and / or Yb+Nd, that is, the first phase RE 3+ :Al 2 o 3 The crystal phase is the first phase Yb 3+ :Al 2 o 3 crystal phase, or the first phase Nd 3+ ,Yb 3+ :Al 2 o 3 crystal phase, or Yb 3+ :Al 2 o 3 with Nd 3+ ,Yb 3+ :Al 2 o 3 common crystalline phases. where, when the first phase RE 3+ :Al 2 o3 The crystal phase is the first phase Yb 3+ :Al 2 o 3 Crystal phase, the molar ratio of Yb and (Yb+Al) is preferably 0.01-0.1; when the first phase RE 3+ :Al 2 o 3 The crystal phase is the first phase Nd 3+ ,Yb 3+ :Al 2 o 3 crystal phase, or Yb 3+ :Al 2 o 3 with Nd 3+ ,Yb 3+ :Al 2 o 3 When the crystal phase is composed together, the molar ratio of Nd and (Nd+Yb+Al) is 0.01-0.08, and the molar ratio of Yb and (Nd+Yb+Al) is 0.01-0.1, the second phase Ce 3+ : the molar ratio of Ce and (Ce+Al) in the YAG crystal phase is 0.001-0.1, and the RE 3+ :Al 2 o 3 and Ce 3+ :Al 2 o 3 The molar ratio is 0.5-10.

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Abstract

A wavelength conversion element, a preparation method thereof, and an illumination source, wherein the material of the wavelength conversion element is a multiphase ceramic, and the multiphase ceramic includes a first phase (11) and a second phase (12) uniformly interspersed and distributed, and the The emission spectrum of the first phase and the excitation spectrum of the second phase overlap. The present invention converts the first phase RE 3+ :Al 2 o 3 Crystal phase and second phase Ce 3+ The wavelength conversion element is made of multi-phase ceramics with evenly interspersed distribution of :YAG crystal phase, so that the lighting source containing the wavelength conversion element has a wide spectrum and high color rendering index, which effectively improves the uneven color in the exit spot. The light extraction efficiency of the light-emitting surface is improved, and it still has good optical performance at a relatively high temperature.

Description

technical field [0001] The invention relates to a wavelength conversion element, a preparation method thereof, and an illumination light source, belonging to the technical field of illumination light source manufacturing. Background technique [0002] At present, the two promising lighting methods in the lighting industry are LED lighting and laser lighting, but LED has problems such as low brightness and sudden drop in efficiency. The laser diode excites the fluorescent material through the excitation light source for white light illumination. It has the advantages of high electro-optical conversion efficiency, high brightness, inefficient dip phenomenon and small size. The light source excites the yellow fluorescent material, and the converted yellow light is mixed with the unconverted blue light to obtain white light. In this solution, the performance of the fluorescent material has a significant impact on the overall performance of the lighting source. [0003] Traditi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/50C04B35/505C04B35/622C04B35/638F21K9/64F21V9/30F21Y115/30
CPCC04B35/50C04B35/505C04B35/622C04B35/638F21K9/64F21V9/30C04B2235/3217C04B2235/3206C04B2235/6581C04B2235/6567F21Y2115/30F21K2/00C04B35/44C04B35/01
Inventor 徐梦梦许颜正
Owner YLX INC
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