Silicate-based phosphor material and preparation method thereof

A phosphor and silicate technology, applied in the directions of luminescent materials, chemical instruments and methods, electrical components, etc., to achieve the effects of wide excitation range, low cost, and simple operation

Active Publication Date: 2018-11-30
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, people's research on solid-state luminescent materials has mainly focused on visible light and ultraviolet light-emitting fluorescent materials, and there is relatively little research on near-infrared emitting fluorescent materials. There are no corresponding mature products on the market, and further research and development are urgently needed. High-performance and versatile near-infrared light source

Method used

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  • Silicate-based phosphor material and preparation method thereof
  • Silicate-based phosphor material and preparation method thereof
  • Silicate-based phosphor material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0039] A phosphor material for near-infrared fluorescent conversion LED, the chemical expression of the phosphor is NaSc 0.96 Si 2 o 6 : 0.04Cr, its preparation steps are as follows:

[0040] 1. Weigh the raw material Na 2 CO 3 0.007mol, Sc 2 o 3 0.0048mol, SiO2 0.014mol, Cr 2 o 3 0.0002mol;

[0041] 2. The weighed raw materials and 1.5% NH 4 After F is fully mixed as a flux, it is sintered in air at 1200 ° C for 10 hours to obtain a roasted product;

[0042] 3. Fully grind the roasted product into powder and pass through a 200-mesh sieve, wash with deionized water for 3 times, and dry at 80°C to obtain the NaSc of the present invention. 0.96 Si 2 o 6 : 0.04Cr near-infrared phosphor.

[0043] The excitation spectrum and emission spectrum of this example are as figure 1 shown.

Embodiment 2

[0045] A phosphor material for near-infrared fluorescent conversion LED, the chemical expression of the phosphor is LiSc 0.96 Si 2 o 6 : 0.04Cr, its preparation steps are as follows:

[0046] 1. Weigh the raw material Li 2 CO 3 0.005mol, Sc 2 o 3 0.0048mol, SiO 2 0.012mol, Cr 2 o 3 0.0002mol;

[0047] 2. The weighed raw materials and 1.5% NH 4 After F is fully mixed as a flux, it is sintered at 1200 ° C in air for 5 hours to obtain a roasted product;

[0048] 3. Grind the roasted product into powder and pass it through a 200-mesh sieve, wash it three times with deionized water, and dry it at 100°C to obtain the near-infrared phosphor LiSc of the present invention. 0.96 Si 2 o 6 : 0.04Cr.

[0049] The excitation spectrum and emission spectrum of this example are as figure 2 , 3 shown.

Embodiment 3

[0051] A phosphor material for near-infrared fluorescent conversion type LED, the chemical expression of the phosphor is Na 0.8 Li 0.2 sc 0.98 Si 2 o 6 : 0.02Cr, its preparation steps are as follows:

[0052] 1. Weigh the raw material Na 2 CO 3 0.004mol, Li 2 CO 3 0.001mol, Sc 2 o 3 0.0049mol, SiO 2 0.01mol, Cr 2 o 3 0.0001mol;

[0053] 2. The weighed raw materials and 2% H of the total weight of the raw materials 3 BO 3 After being fully mixed as a flux, it was sintered at 1250°C in air for 6 hours to obtain a calcined product;

[0054] 3. Fully grind the calcined product into powder and pass through a 200-mesh sieve, wash with deionized water for 3 times, and dry at 120°C to obtain the near-infrared fluorescent powder Na 0.8 Li 0.2 sc 0.98 Si 2 o 6 : 0.02Cr.

[0055] The excitation spectrum and emission spectrum of this example are as Figure 4 , 5 shown.

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Abstract

The invention discloses a silicate-based phosphor material and a preparation method thereof, wherein the chemical expression formula of the phosphor material is RM1-xSi2O6:xCr, R is one or a pluralityof materials selected from Li, Na and K, M is one or a plurality of materials selected from Sc, Ga, Y and Lu, and x is more than or equal to 0.005 and is less than or equal to 0.2. According to the present invention, the prepared phosphor material has characteristics of stable chemical property and excellent light-emitting performance, can be excited by blue-light or red-light LED chips, and is used for constructing fluorescent conversion type LED devices; and the preparation method has characteristics of simple operation, no pollution and low cost.

Description

technical field [0001] The invention relates to a phosphor material and a preparation method thereof, in particular to a silicate-based phosphor material and a preparation method thereof. Background technique [0002] Since the birth of high-brightness blue LED and white LED, solid-state lighting technology has been greatly developed and brought a revolution to the lighting and display industry. Due to its high luminous efficiency, environmental friendliness, long life, compactness, and good reliability, white LEDs are gradually replacing traditional incandescent and fluorescent lamps and becoming new light sources in many fields. The method of manufacturing white LED devices is to combine blue LED chips with some light-emitting materials with suitable emission wavelengths. This type of fluorescent conversion white LED has simple device structure and low manufacturing cost. In addition to white LEDs, the rapid development of solid-state lighting technology also provides a p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/79H01L33/50
CPCC09K11/7708C09K11/7776H01L33/501
Inventor 邵起越丁浩徐小雪董岩蒋建清
Owner SOUTHEAST UNIV
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