Red luminous silicon-oxygen nitride fluorescent material, preparation method and light emitting device using same

A silicon oxynitride and fluorescent material technology, applied in luminescent materials, chemical instruments and methods, use of gas discharge lamps, etc., can solve the problem of not well meeting the technical requirements of warm white LEDs, low luminous intensity, and large luminous efficiency attenuation And other issues

Inactive Publication Date: 2010-06-09
DALIAN LUMINGLIGHT SCIENCE & TECHNOLOGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alkaline earth metal elements, rare earth metal elements and their binary nitrides, and silicon diimides are extremely active substances that are extremely sensitive to air and humidity. Therefore, the above-mentioned preparation method has fine and harsh conditions, cumbersome steps, difficult control, and extremely high cost. High limitations, only suitable for a small amount of preparation in the laboratory, not conducive to the realization of industrial scale mass production
In addition, the sensitive, harsh and difficult-to-control characteristics of the raw materials and manufacturing process of the above-mentioned published patents make it difficult to adjust the emission wavelength and luminous intensity of fluorescent materials through effective means such as composition adjustment, co-activators and fluorescence enhancers. Therefore, the luminous intensity of the component-fixed fluorescent material prepared by the above-mentioned published patent is low, far lower than that of the yellow aluminate phosphor, and can only be finitely adjusted through the limited adjustment of its own elements and the introduction of trace elements in the crucible material. Emission wavelength and luminous intensity o

Method used

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  • Red luminous silicon-oxygen nitride fluorescent material, preparation method and light emitting device using same
  • Red luminous silicon-oxygen nitride fluorescent material, preparation method and light emitting device using same
  • Red luminous silicon-oxygen nitride fluorescent material, preparation method and light emitting device using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] raw material

[0079] First, weigh the above-mentioned raw materials with the molar ratio of Ca: Sr: Eu: F: Si = 0.85: 1.25: 0.04: 0.02: 4.85, grind and mix them well, then put them into a boron nitride crucible, put them into a precision Controlled heat treatment furnace, in high-purity N 2 Sintering at 1300-1700°C for several hours in the atmosphere, during this process MI Calcium acetate decomposes to form a certain amount of activated carbon, and the activated carbon further reduces various oxide phases to metal elements. At the same time, each metal element and a small amount of unreduced oxides enter the silicon nitride lattice to obtain Red loose target sintered body. After crushing, grinding and sieving, the silicon oxygen nitrogen fluorescent material Ca with orange-red light emission in the present invention is obtained. 0.85 Sr 1.25 Eu 0.04 Si 4.85 o 0.31 f 0.02 N 7.68 . The material has an emission peak wavelength of 591nm under the excitat...

Embodiment 2-62

[0080] Embodiment 2-62, preparation method and steps are the same as embodiment 1. Adopt the calcium acetate ((CH) in the embodiment 1 3 COO) 2 Ca·xH 2 O) As a reducing raw material, partial substitution of M by Zn II Alkaline earth metals, Ge partly substituted for Si, F - and / or Cl - The introduction of fluxing and fluorescence enhancing ions, and the introduction of other rare earth co-activating ions can fine-tune the emission peak wavelength and luminous intensity of the fluorescent material. According to the preparation method and steps of preparing the fluorescent material in Example 1, the silicon oxygen nitrogen fluorescent material fluorescent material of Example 2-62 with orange-red emission varying in the range of emission peak wavelength from 580 to 680 nm was prepared.

[0081] Table 1 shows the coefficient value range, component composition and emission peak wavelength corresponding to the expression (1) of the fluorescent materials of each embodiment.

[...

Embodiment 63

[0087] raw material

[0088] First, weigh the above-mentioned raw materials with the molar ratio of Ca:Sr:Eu:F:Si=0.35:1.75:0.04:0.02:5, grind and mix them well, then put them into a boron nitride crucible, put them into a precision Controlled heat treatment furnace, in high-purity N 2 Sintering at 1300-1700°C for several hours in the atmosphere, during this process M I Calcium propionate decomposes to form a large amount of activated carbon, and the activated carbon further reduces various oxide phases to metal elements. At the same time, each metal element and a very small amount of unreduced oxides enter the silicon nitride lattice to Obtain a red loose target sintered body. After crushing, grinding and sieving, the silicon oxygen nitrogen fluorescent material Ca with orange-red light emission in the present invention is obtained. 0.35 Sr 1.75 Eu 0.04 Si 5 o 0.11 f 0.02 N 8.01 . The emission peak wavelength of the material is at 621nm under the excitation...

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Abstract

The invention relates to red luminous silicon-oxygen nitride fluorescent material, preparation method and light emitting device using same. The general formula of the fluorescent material is MIuMIIv(Sil-alphaAalpha)wO deltaN(2/3(u+v)+4/3w-2/3delta): Eux, Ry, Dz, wherein MI is a Ca or Sr element; MII is selected from at least one element of Sr or Ca, Ba and Zn; A is selected from at least one element of Ge, Al, Ca and In; R is selected from at least one element of Nd, Dy, Ho, Tm, Ce, Er, Pr, Bi, Sm, Yb, Lu, Gd, Tb and Mn; D is selected from at least one ion of F-, Cl-, Br- and I-; and u, v, w, alpha, delta, x, y and z are molar coefficients. The fluorescent material capable of being excited by ultraviolet-blue-green light and emitting red light is prepared by adopting a normal pressure self-reduction synthesis method and applied to manufacture LED devices.

Description

technical field [0001] The invention relates to a silicon oxynitride red fluorescent material, in particular to a fluorescent material for white light and multi-color light-emitting devices including semiconductor light-emitting elements (LEDs). This material can be applied to lighting technology, display and field of optoelectronics. Background technique [0002] With the advent of light-emitting diodes, LEDs (semiconductor light-emitting diodes, Light-Emitting Diode), known as "the technology that illuminates the future", are gradually entering our daily lives. As a new lighting technology, LED is triggering a revolution in the field of lighting with its many advantages such as energy saving and environmental protection, flexible application, and long life. The appearance of white light LED is a substantial step for LED from display function to general lighting function. Among the white light LED technologies, warm white light LEDs are the closest to sunlight, are most i...

Claims

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Application Information

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IPC IPC(8): C09K11/86C01G1/00H01L33/00
CPCY02B20/181Y02B20/00
Inventor 肖宇驰邓华夏威于晶杰温嘉琪桑石云徐晶肖志国
Owner DALIAN LUMINGLIGHT SCIENCE & TECHNOLOGY CO LTD
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