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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 semiconductor field, can solve the problems of polluting the environment, easy decomposition, exhaust gas discharge, etc., and achieve the effect of high energy conversion and high brightness

Active Publication Date: 2014-09-03
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 examples of luminescent materials

[0045] Weigh Sr according to the above composition 3 N 2 (27.0746g), Li 3 N (0.1803 g), Si 3 N 4 (57.6933g), CeN (2.3798g) and AlN (12.6719g), after being mixed and ground uniformly in a glove box filled with argon, put in a boron nitride crucible and fired in an air pressure furnace, and pass 0.3MPa N 2 ,Hold at 1700°C for 4 hours, and the powder obtained is ground and then calcined at high temperature under the same conditions to promote the growth of crystal grains. The obtained luminescent material is crushed, washed with hydrochloric acid to remove impurities, and dried to obtain 100 g of the yellow luminescent material of the present invention. See the emission spectrum and excitation spectrum figure 1 . From figure 1 It can be found that the emission spectrum of the luminescent material is relatively wide, the half-height width of the spectrum is about 130nm, and the main ...

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 examples of luminescent materials

[0047] Weigh Sr according to the above composition 3 N 2 (27.0204g), Li 3 N (0.1799 g), Si 3 N 4 (55.4185g), Ce 2 O 3 (2.5293g), Al 2 O 3 (1.5731g) and AlN (13.2788g), after being mixed evenly in a glove box filled with argon, put into a boron nitride crucible and fired in an air pressure furnace, and pass 0.3MPa N 2 , With 0.1gSrF 2 As a flux, it is kept at 1700°C for 4 hours, and the obtained powder is ground and then calcined at a high temperature under the same conditions to promote the growth of crystal grains. The obtained luminescent material is crushed, washed with hydrochloric acid to remove impurities, and dried to obtain 100 g of the yellow luminescent material of the present invention. See the emission spectrum and excitation spectrum figure 2 . From figure 2 It can be found that the emission spectrum of the luminescent material is relatively wide...

Embodiment 2-8 and 10-16

[0049] The preparation process of the above embodiment is the same as that of embodiment 1 or embodiment 9, in which Ce halide such as CeCl can also be used 3 Or nitrates such as Ce(NO 3 ) 3 The reaction flux used is chloride or fluoride such as Sr, Ca, Ba, Li, etc. The luminous intensity of the luminescent material obtained 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 and ultraviolet light, and can replace YAG phosphors to prepare white light LEDs.

[0050] Table 1 Chemical formula and luminescence characteristics of Examples 1-18 (excitation wavelength is 450nm)

[0051] Example

Chemical formula

Main emission 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

Sr 0.85 Ca 0.05 Li 0.05 Si 4 AlN 7 :Ce 0.05

580

85

4

Sr 0.85 Ba 0.05 Li 0.05 Si 4 AlN 7 :Ce 0.05

568

...

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Abstract

A nitrogen oxide compound luminescent material, its chemical formula is: M1-yX4-xZ1+xOxN7-x:Ry, wherein, M is one or more of alkali metals, alkaline earth metals, rare earth metals, and transition metals; X is Si , at least one of Ge, B, Al and contains Si; Z is at least one of Al, Ga, In and contains Al; R is at least one of the luminescent center elements Eu, Ce, Tb, Yb, Sm, Pr, Dy species; 0≤x<0.5; 0<y<1.0. When the luminescent material is excited by an excitation light source such as ultraviolet, near ultraviolet or blue light, it can emit yellow light or red light with a wavelength of 500-750nm, and can be prepared by cooperating with ultraviolet, near ultraviolet or blue LED and other luminescent materials such as green phosphor powder. White LED light source. The luminescent material of the invention has the characteristics of wide excitation wavelength range, high efficiency and stability, simple preparation method, easy batch production and no pollution.

Description

Technical field [0001] The present invention relates to the field of semiconductors, in particular to a nitrogen compound luminescent material, a preparation method thereof and an illumination light source made therefrom. Background technique [0002] GaN-based light-emitting diode LED (Light-Emitting Diode) is a new type of light-emitting device known as 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, low maintenance, etc. , 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., replacing all kinds of light bulbs and Trend of fluorescent lamps. This new type of green light source is bound to become a new generation of lighting system, which has extensive and far-reaching significance for energy conservation, envir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/64C09K11/66C09K11/80F21S2/00F21Y101/02
CPCH05B33/14C09K11/7721Y02B20/181C09K11/0883Y02B20/00C09K11/77218C09K11/59C09K11/64H01L33/50
Inventor 贾晓卿王海嵩鲍鹏
Owner BEIJING YUJI SCI & TECH
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