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Laser-excited fluorescent glass film and preparation method thereof

A technology for exciting fluorescent and fluorescent glass, which is applied in the direction of climate sustainability, sustainable architecture, and energy-saving lighting. Avoid the decline of heat dissipation performance, improve light efficiency and color rendering performance, and avoid the effect of easy cracking of the film layer

Active Publication Date: 2021-03-02
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current fluorescent glass film materials used for laser lighting and laser projection display usually use a single yellow-emitting YAG:Ce 3+ As a fluorescence conversion material, due to the YAG:Ce 3+ The lack of effective green and red light components in the luminous spectrum of the laser causes the final laser white light to exhibit a low color rendering index or color gamut, and cannot achieve warm white light emission, which greatly limits laser lighting and laser projection display at high Applications in the field of color rendering

Method used

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  • Laser-excited fluorescent glass film and preparation method thereof
  • Laser-excited fluorescent glass film and preparation method thereof
  • Laser-excited fluorescent glass film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: a kind of fluorescent glass thin film, by the commercial K of 50wt% 2 O-Na 2 O-Al 2 o 3 -SiO 2 Glass powder with 50wt% YAGG:Ce 3+ Yellow-green phosphor, 50wt% commercial K 2 O-Na 2 O-Al 2 o 3 -SiO 2 Glass powder with 50wt% GdYAG:Ce 3+ The orange phosphors are composed separately.

[0041] Will commercially use YAGG:Ce 3+ Phosphor powder (Suzhou Lanbo Photoelectric Technology Co., Ltd.) and GdYAG:Ce 3+ Phosphor powder (Suzhou Lanbo Photoelectric Technology Co., Ltd.) and commercial K 2 O-Na 2 O-Al 2 o 3 -SiO 2 Glass powder (Changzhou Wujin Xinghai Chemical Co., Ltd.) is weighed according to the ratio of mass ratio 1:1, mixed evenly, and organic slurry is added. The organic slurry is made of ethyl acetate (Shanghai Aladdin Biochemical Co., Ltd., ≥88.5%) ), ethyl cellulose (Shanghai Aladdin Biochemical Co., Ltd., 18-22mPa.S), terpineol (Shanghai Aladdin Biochemical Co., Ltd., 85%) were mixed evenly in a mass ratio of 3:1:16 Prepared by stirr...

Embodiment 2

[0045] Embodiment 2: a kind of fluorescent glass thin film, by the commercial K of 50wt% 2 O-Na 2 O-Al 2 o 3 -SiO 2 Glass powder with 50wt% YAG: Ce 3+ Composition of yellow fluorescent powder.

[0046] Commercial YAG: Ce 3+ Phosphor commercial K 2 O-Na 2 O-Al 2 o 3 -SiO 2 Weigh and mix the glass powder according to the mass ratio of 1:1, add the organic slurry and stir until it becomes gelatinous, and coat two layers of YAG: Ce on both sides of the sapphire substrate respectively. 3+ PiG and a layer of YAG: Ce 3+ PiG is cured and formed on a heating platform and then placed in a muffle furnace. The temperature is raised to a maximum temperature of 750°C at a room temperature of 25°C and kept at a temperature of 10 minutes. The temperature is lowered to a room temperature of 25°C and taken out to obtain a fluorescent glass film.

[0047] Fluorescent glass thin film prepared in embodiment 1 and single YAG in embodiment 2: Ce 3+ Optical performance comparison of fluo...

Embodiment 3

[0048] Embodiment 3: a kind of fluorescent glass thin film, by the commercial K of 50wt% 2 O-Na 2 O-Al 2 o 3 -SiO 2 Glass powder with 50wt% YAGG:Ce 3+ Yellow-green phosphor, 50wt% commercial K 2 O-Na 2 O-Al 2 o 3 -SiO 2 Glass powder with 50wt% GdYAG:Ce 3+ The orange phosphors are composed separately.

[0049] Will commercially use YAGG:Ce 3+ Phosphor and GdYAG:Ce 3+ Phosphors were compared with commercial K 2 O-Na 2 O-Al 2 o 3 -SiO 2 Weigh and mix the glass powder according to the mass ratio of 1:1, add the organic slurry and stir until it becomes gelatinous, and coat a layer of YAGG:Ce on both sides of the sapphire substrate respectively. 3+ PiG and two layers of GdYAG:Ce 3+ PiG, after being solidified on a heating table, placed in a muffle furnace, heated to a maximum temperature of 750°C at a room temperature of 25°C (the optimum sintering temperature is related to the glass powder matrix, and the glass powder used in our prepared samples is the same , so...

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Abstract

The invention discloses a laser-excited fluorescent glass film and a preparation method thereof. The fluorescent glass film is a double-sided composite fluorescent glass film structure, and the fluorescent glass film structure comprises a YAGG:Ce<3+> fluorescent glass film at one side of a sapphire substrate and a GdYAG:Ce<3+> fluorescent glass film at the other side of the sapphire substrate. Thepreparation method comprises the following steps: preparing yellow-green fluorescent powder and glass powder mixed slurry; preparing orange fluorescent powder and glass powder mixed slurry; and preparing the laser-excited fluorescent glass film. Yellow-green and orange light-emitting fluorescent films are compounded, so that the problem that green light and red light in a single yellow light-emitting YAG:Ce<3+> fluorescent film are insufficient can be solved, and the color rendering index of obtained white light is increased. Meanwhile, the double-sided composite structure not only can avoidthe problems that the film layer is easy to crack and the heat dissipation performance is reduced due to the superposition of a plurality of film layers, but also can realize the fine control of the thicknesses of different fluorescent powder layers.

Description

technical field [0001] The invention relates to the field of fluorescent glass films, in particular to a laser-excited fluorescent glass film and a preparation method thereof. Background technique [0002] As we all know, white LED (Light Emitting Diode, LED) has many advantages, such as energy saving, high efficiency, high reliability and environmental friendliness, etc., but there is a problem of "sudden drop in efficiency" in blue LED chips. This problem makes LED chips unsuitable for ultra-high power or brightness solid-state lighting applications. In contrast, the luminous efficiency of a laser diode (LD) is proportional to the input current, and high-power excitation light can be obtained. Because lasers exhibit excellent properties, such as high brightness, excellent directivity, good monochromaticity, and small emission spot area, the use of lasers to excite fluorescence conversion materials to generate high-power white light has very good application prospects. ...

Claims

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Application Information

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IPC IPC(8): C04B41/52
CPCC04B41/52C04B41/009C04B14/303C04B41/5022C04B41/4539C04B41/4501C04B41/0072Y02B20/00
Inventor 王乐孟遥邾强强张宏翟玥胡翔宇曹丽
Owner CHINA JILIANG UNIV
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