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Nitride phosphor/glass composite light conversion component for laser lighting and its preparation

A nitride phosphor, laser lighting technology, used in lighting and heating equipment, lighting devices, semiconductor devices of light-emitting elements, etc. problem, to achieve the effect of excellent luminescence performance, maintaining luminescence performance, and excellent thermal quenching performance

Inactive Publication Date: 2020-05-15
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this "LED chip + organic resin packaging" solution encountered three major problems in realizing high-brightness white lighting: (1) LED chips face serious "efficiency drop" problems with the increase of input current density; ( 2) White LEDs will generate a lot of heat when they work, and organic packaging materials are prone to aging or even carbonization, which seriously affects the reliability of the light source; (3) YAG:Ce yellow phosphor has serious thermal quenching phenomenon at higher operating temperatures , the external quantum efficiency drops by more than 20% at 200°C
However, during the preparation of nitride phosphor glass, the corrosion of nitride phosphor by molten glass liquid will seriously degrade its luminescent performance.
Chinese invention patent (CN103819091A) and the Shanghai Institute of Optics and Fine Mechanics of the Chinese Academy of Sciences (Q.Q.Zhu, et al "J.Alloys Compd." 2017; 702:193-198) have reported that based on CaAlSiN 3 : Phosphor glass with Eu red phosphor suffered from severe degradation of luminous performance
Donghua University Wang Hongzhi et al. (Chinese patent CN 106833611A) adopted SiO 2 coated CaAlSiN 3 :Eu to inhibit the corrosion of molten glass, making CaAlSiN 3 : The luminescent performance of Eu fluorescent glass has been improved to some extent, but the preparation process is complicated
Moreover, there are still problems such as low thermal conductivity, and red nitride fluorescent glass cannot be directly combined with blue laser diodes to obtain white light.
Therefore, the industry believes that nitride phosphors are not suitable for the preparation of fluorescent glass

Method used

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  • Nitride phosphor/glass composite light conversion component for laser lighting and its preparation
  • Nitride phosphor/glass composite light conversion component for laser lighting and its preparation
  • Nitride phosphor/glass composite light conversion component for laser lighting and its preparation

Examples

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Effect test

Embodiment 1

[0068] 0.5g La 3 Si 6 N 11 : Ce phosphor and 0.5g low melting point glass powder with a glass transition temperature of 620°C (D 90 = 10 μm) in a mortar and mix evenly, then add 1mL of organic binder, mix evenly to obtain phosphor slurry, and then apply it evenly on the transparent sapphire substrate with photonic crystal film on the surface by doctor blade method, the thickness is controlled to be 50 μm. After the phosphor slurry is leveled, place it on a hot table at 120°C for 10 minutes to solidify, then transfer it to a muffle furnace, raise the temperature to 650°C at 10°C / min and keep it warm for 10 minutes, then cool down with the furnace to obtain a laser lighting product. Nitride phosphor / glass composite light conversion components, such as Figure 4 shown. The thermal conductivity is 20W / (m·K), much higher than ordinary fluorescent glass ( Figure 5 for la 3 Si 6 N 11 : The XRD pattern of the Ce phosphor powder / glass composite coating is the physical superposi...

Embodiment 2

[0070] 0.7g La 3 Si 6 N 11 : Ce phosphor and 0.3g low melting point glass powder with a glass transition temperature of 550°C (D 90 = 20 μm) in a mortar and mix evenly, then add 1.5mL of organic binder, mix evenly to obtain phosphor powder slurry, and then apply it evenly on the white Al 2 o 3 On the ceramic substrate, the control thickness is 30 μm. After the phosphor slurry is leveled, place it on a hot table at 120°C for 10 minutes to solidify, then transfer it to a muffle furnace, raise the temperature to 570°C at 10°C / min and keep it warm for 10 minutes, then cool down with the furnace to obtain a laser lighting product. Nitride phosphor / glass composite light conversion component with a thermal conductivity of 13W / (m·K). The nitride phosphor / glass composite light conversion component for laser illumination and the blue laser diode with a wavelength of about 450nm (input current 0.5A) are pressed image 3 Coupled, a reflective laser lighting white light source can be...

Embodiment 3

[0072] 0.6g La 3 Si 6 N 11 : Ce phosphor and 0.4g low melting point glass powder with a glass transition temperature of 620°C (D 90 = 10 μm) in a mortar and mix evenly, then add 1mL of organic binder, mix evenly to obtain a phosphor slurry, and then apply it evenly on the gray AlN ceramic substrate with a doctor blade method, and control the thickness to 50 μm. After the phosphor slurry is leveled, place it on a hot table at 120°C for 10 minutes to solidify, then transfer it to a muffle furnace, raise the temperature to 650°C at 10°C / min and keep it warm for 10 minutes, then cool down with the furnace to obtain a laser lighting product. Nitride phosphor / glass composite light conversion component with a thermal conductivity of 70W / (m·K). The nitride phosphor / glass composite light conversion component for laser illumination and the blue laser diode with a wavelength of about 450nm (input current 0.5A) are pressed image 3 Coupled, a reflective laser lighting white light sour...

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Abstract

The invention relates to a nitride phosphor / glass composite optical conversion kit for laser illumination and a preparation thereof, which relates to light conversion components. Nitride phosphor / glass composite optical conversion kit for laser illumination comprises a nitride phosphor / glass composite coating and a high thermal conductivity ceramic substrate, the nitride phosphor / glass composite coating is closely grown on the high thermal conductivity ceramic substrate. The preparation of phosphor slurry: the nitride phosphor / glass composite optical conversion kit is prepared for laser illumination. The nitride phosphor / glass composite optical conversion kit can be used in laser illumination. The luminous efficiency above 280 lm / W can be obtained by coupling the provided nitride phosphor / glass composite optical conversion kit for laser illumination with a laser source with emission wavelength about 450 nanometers.

Description

technical field [0001] The invention relates to a light conversion component, in particular to a nitride phosphor powder / glass composite light conversion component for laser lighting and a preparation method thereof. Background technique [0002] White light LED has the advantages of energy saving, environmental protection, high efficiency, long life, etc., and is considered to be the fourth-generation lighting source beyond incandescent lamps and fluorescent lamps. Commercial white LEDs are mainly realized by packaging InGaN blue LED chips and YAG:Ce yellow phosphor powder together. The packaging process is usually to mix YAG:Ce phosphor powder with organic epoxy resin or silicone resin, and then directly coat it on LED chip surface. However, this "LED chip + organic resin packaging" solution encountered three major problems in realizing high-brightness white lighting: (1) LED chips face serious "efficiency drop" problems with the increase of input current density; ( 2) W...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21K9/64F21K9/90F21Y115/30
CPCF21K9/64F21K9/90F21Y2115/30
Inventor 解荣军游世海郑鹏周天亮李淑星
Owner XIAMEN UNIV
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