Whole color fluorescent material and preparation method thereof

A fluorescent material, white technology, applied in the field of full-color fluorescent materials, can solve problems such as high sintering temperature, uneven distribution of luminous centers, and rising chip temperature, and achieve good chemical stability, simple preparation process, and small product particle size.

Inactive Publication Date: 2007-10-03
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method also has a very serious disadvantage, that is, as the input power increases, the heat generation of the LED increases, which increases the temperature of the chip, resulting in a decrease in the reliability of the LED and a decrease in the light output efficiency.
[0004] It can be seen from the above situation that whether the principle of complementary colors or the principle of mixi...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 100g lithium nitrate, 250.7g yttrium nitrate, 69.168g zirconium nitrate (Zr(NO 3 ) 4 ·5H 2 O), 56.63g of europium nitrate, 46.84g of dysprosium nitrate, 4.95g of boric acid, 523.5g of urea, and 880.1g of citric acid were dissolved in water, heated at 100°C for 40 minutes, and then sintered at 700°C for 25 minutes to obtain white Powdered full-color fluorescent material.

Embodiment 2

[0017] Weigh 100g lithium nitrate, 250.7g yttrium nitrate, 69.168g zirconium nitrate (Zr(NO 3 ) 4 ·5H 2 O), 60.83g europium nitrate, 55.60 dysprosium nitrate, 3.61g cerium nitrate, 5.98g boric acid, 640.8g urea, 897.7g citric acid were dissolved in water, heated at 140°C for 30 minutes, then sintered at 800°C for 20 minutes, The white powdery full-color fluorescent material can be obtained.

Embodiment 3

[0019] Weigh 100g lithium nitrate, 250.7g yttrium nitrate, 69.168g zirconium nitrate (Zr(NO 3 ) 4 ·5H 2 O), 68.43g europium nitrate, 59.97g dysprosium nitrate, 3.59g lanthanum nitrate, 6.97g boric acid, 691.2g urea, 983.5g citric acid were dissolved in water, heated at 160°C for 20 minutes, then sintered at 900°C for 10 minutes, The white powdery full-color fluorescent material can be obtained.

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PUM

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Abstract

This invention relates to a panchromatic luminescent material, formulae is LiYZrO:Eu3+, Dy3+, R3+. The R represents B3+ or mixture of any kinds of rare earth ion and B3+ ion. The process: dissolve lithium nitrate, yttrium nitrate, zirconium nitrate, europium nitrate, dysprosium nitrate and boric acid or mixture of any rare earth nitrate and boric acid in de-ionized water, then add urea and citric acid to above solution, heat and whip, then by agglutination to gain product. This luminescent material is panchromatic blazing, has high emissive power, uniformity phase, small granularity, belong to nanometer level, and has good chemical stability.

Description

technical field [0001] The invention relates to a full-color fluorescent material and belongs to the technical field of luminescent materials. technical background [0002] Since Edison invented the incandescent lamp in 1882, artificial lighting sources have gone through three stages of development: incandescent lamps, neon lamps, and gas discharge lamps. In 1993, Japan first made a technological breakthrough on blue GaN light-emitting diodes, and realized white LEDs in 1996. In recent years, it is heading towards the fourth development stage of lighting sources—the direction of white LED-based semiconductor lighting sources. develop. Because white LEDs do not contain mercury, they have the advantages of power saving, environmental protection, and long life. They are known as "green lighting sources" and can be widely used in communications, electronics, automobiles, photoelectric displays and other industries, and will gradually replace traditional lighting equipment. [...

Claims

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Application Information

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IPC IPC(8): C09K11/78
Inventor 吕孟凯邱子凤周媛媛张爱玉马谦
Owner SHANDONG UNIV
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