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Nitrogen oxides luminescent material and preparation method thereof and lighting source made of same

A technology of nitrogen oxides and luminescent materials, applied in the field of semiconductors, can solve problems such as environmental pollution, easy decomposition, poor chemical and thermal stability of sulfide phosphors, and achieve high energy conversion and high brightness effects

Active Publication Date: 2012-07-11
BEIJING YUJI SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chemical and thermal stability of sulfide phosphor is very poor, it is easy to react with moisture in the air, and it is easy to decompose when heated, and waste gas is emitted during the production process, polluting the environment

Method used

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  • Nitrogen oxides luminescent material and preparation method thereof and lighting source made of same
  • Nitrogen oxides luminescent material and preparation method thereof and lighting source made of same
  • Nitrogen oxides luminescent material and preparation method thereof and lighting source made of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1: Sr 0.90 Li 0.05 Si 4 AlN 7 : Ce 0.05 Preparation example of luminescent material

[0045] Weigh Sr according to the above composition 3 N 2 (27.0746 grams), Li 3 N (0.1803 g), Si 3 N 4 (57.6933 grams), CeN (2.3798 grams) and AlN (12.6719 grams), after mixing and grinding uniformly in a glove box filled with argon, put it into a boron nitride crucible and roast it in a pressure furnace, and introduce 0.3MPa N 2 , kept at 1700°C for 4 hours, the obtained powder was ground and then fired at high temperature under the same conditions to promote the development of grains. The obtained luminescent material was pulverized, washed with hydrochloric acid to remove impurities, and dried to obtain 100 g of the yellow luminescent material of the present invention. Its emission and excitation spectra are shown in figure 1 . From figure 1 It can be found that the emission spectrum of the luminescent material is wide, the half maximum width of the spectrum is a...

Embodiment 9

[0046] Example 9: Sr 0.90 Li 0.05 Si 3.85 al 1.15 o 0.15 N 6.85 : Ce 0.05 Preparation example of luminescent material

[0047] Weigh Sr according to the above composition 3 N 2 (27.0204 g), Li 3 N (0.1799 g), Si 3 N 4 (55.4185 g), Ce 2 o 3 (2.5293 g), Al 2 o 3 (1.5731 g) and AlN (13.2788 g), after mixing and grinding evenly in a glove box filled with argon, put it into a boron nitride crucible and roast it in a pressure furnace, and feed 0.3MPa N 2 , with 0.1gSrF 2 It is used as a flux, and it is kept at 1700°C for 4 hours. The obtained powder is ground and then fired at a high temperature under the same conditions to promote the development of grains. The obtained luminescent material was pulverized, washed with hydrochloric acid to remove impurities, and dried to obtain 100 g of the yellow luminescent material of the present invention. Its emission and excitation spectra are shown in figure 2 . From figure 2 It can be found that the emission spectrum of...

Embodiment 2-8 and 10-16

[0049] The preparation process of the above examples is the same as that of Example 1 or Example 9, wherein Ce halides such as CeCl can also be used 3 or nitrates such as Ce(NO 3 ) 3 etc., the reaction flux used is chloride or fluoride of Sr, Ca, Ba, Li, etc., and the luminous intensity of the obtained luminescent material is shown in Table 1. The maximum emission wavelength of these luminescent materials is mostly in the yellow light region, and can be excited by blue light and ultraviolet light, and can replace YAG phosphor powder to prepare white light LEDs.

[0050] The chemical formula of table 1 embodiment 1-18 and its luminescence characteristic (excitation wavelength is 450nm)

[0051] Example

chemical formula

Emission main peak nm

Relative Strength%

[0052] 1

Sr 0.90 Li 0.05 Si 4 AlN 7 : Ce 0.05

573

100

2

Sr 0.80 Li 0.10 Si 4 AlN 7 : Ce 0.10

576

94

3

S...

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PUM

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Abstract

The invention relates to a nitrogen oxides luminescent material. The chemical formula of the nitrogen oxides luminescent material is M1-yX4-xZ1+xOxN7-x: Ry, wherein M is one or several of an alkali metal, an alkaline-earth metal, a rare-earth metal and a transition metal; X is at least one of Si, Ge, B and A1 and contains Si; Z is at least one of Al, Ga and In and contains Al; R is at least one of Eu, Ce, Tb, Yb, Sm, Pr and Dy which are elements of a luminescent center; x is greater than or equal to 0.5 and is less than 0.5; and y is greater than or equal to 0 and is less than 1.0. When the luminescent material is excited by an ultraviolet, near ultraviolet or blue light and the like excitation light source, the luminescent material can emit yellow lights or red lights with the wavelength of 500-750mm; and a novel white light LED (Light Emitting Diode) light source can be manufactured by matching the nitrogen oxides luminescent material with an ultraviolet, near ultraviolet or blue light LED and other luminescent material such as green fluorescent powder. The nitrogen oxides luminescent material provided by the invention has the characteristics of wide range of excitation wavelength, high efficiency and stability; and the preparation method is simple and easy for volume production and is pollution-free.

Description

technical field [0001] The invention relates to the field of semiconductors, in particular to a nitrogen compound luminescent material, a preparation method thereof and an illumination source made of the same. Background technique [0002] GaN-based light-emitting diode (Light-Emitting Diode) is a new type of light-emitting device known as the solid-state lighting in the 21st century. It has the advantages of small size, power saving, long life, no mercury that pollutes the environment, high efficiency, and low maintenance. , can be widely used in various lighting facilities, including indoor lighting, traffic signals / indicators, car taillights / headlights, outdoor super-large screens, display screens and advertising screens, etc., and can replace all kinds of bulbs and Fluorescent trend. This new type of green light source will definitely become a new generation of lighting system, which has extensive and far-reaching significance for energy saving, environmental protection...

Claims

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Application Information

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IPC IPC(8): C09K11/64C09K11/66C09K11/80F21S2/00F21Y101/02
CPCC09K11/0883H05B33/14Y02B20/181C09K11/7721Y02B20/00C09K11/77218C09K11/59C09K11/64H01L33/50
Inventor 贾晓卿王海嵩鲍鹏
Owner BEIJING YUJI SCI & TECH
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