Luminous material, preparation method of luminous material and white light LED (light emitting diode) device

A technology for LED devices and luminescent materials, applied in the directions of luminescent materials, chemical instruments and methods, electrical components, etc., can solve the inconsistency of cross-absorption energy loss and thermal quenching behavior, unfavorable commercialization and popularization of white LEDs, and increasing types of white light LED manufacturing cost and other issues, to achieve the effect of reducing self-absorption energy loss, low price, and reducing self-absorption energy loss

Inactive Publication Date: 2017-05-10
XINJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lumen efficiency of this type of white LED device is low due to the problems of cross-absorption energy loss and inconsistent thermal quenching behavior among heterogeneous phosphors.
In addition, in the preparation process of white light LED, the preparation process of mixing three primary color phosphors to prepare white light phosphor is complicated, which increases the manufacturing cost of this type of white light LED to a certain extent, which is not conducive to the commercial promotion and popularization of this type of white light LED

Method used

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  • Luminous material, preparation method of luminous material and white light LED (light emitting diode) device
  • Luminous material, preparation method of luminous material and white light LED (light emitting diode) device
  • Luminous material, preparation method of luminous material and white light LED (light emitting diode) device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment provides a luminescent material, including blue phosphor and yellow phosphor.

[0033] 1-1. Blue phosphor preparation method The chemical composition formula of blue phosphor is (Sr 8-x-z Mg x ) Si 4 o 8 Cl 12 :zEu 2 + , where x=0.2, z=0.05, the specific expression (Sr 7.75 Mg 0.2 ) Si 4 o 8 Cl 12 :0.05Eu 2+ .

[0034] ① Weigh the following materials:

[0035] SrCO 3 : 2.768g, SrCl 2 ·6H 2 O: 5.332g, SiO 2 : 1.204g, Eu 2 o 3 : 0.04399g, MgO: 0.0403g

[0036] ② After fully grinding the above-mentioned weighed materials for 15 minutes, put the mixed powder into an alumina crucible or a carbon crucible, and put it into a high-temperature furnace under 10% H 2 / 90%N 2 Anneal at a high temperature of 1000 C for 3 hours in a reducing atmosphere, cool, take out and grind finely to obtain a Excited powder crystals of blue phosphors with dual wavelength emission.

[0037] 1-2. Preparation method of yellow fluorescent powder The chemical co...

Embodiment 2

[0042] This embodiment provides a luminescent material, including blue phosphor and yellow phosphor.

[0043] 2-1. Preparation method of blue phosphor

[0044] The chemical composition formula of the blue phosphor is (Sr 8-x-z Mg x ) Si 4 o 8 Cl 12 :zEu 2+ , where x=0.6, z=0.05, the specific expression (Sr 7.35 Mg 0.6 ) Si 4 o 8 Cl 12 :0.05Eu 2+ .

[0045] ① Weigh the following materials:

[0046] SrCO 3 : 2.742g, SrCl 2 ·6H 2 O: 5.3324g, SiO 2 : 1.204g, Eu 2 o 3 : 0.04399g, MgO: 0.1209g;

[0047] ② Grind the above-mentioned weighed materials thoroughly for 20 minutes, put the mixed powder into an alumina crucible or carbon crucible, put it in a high-temperature furnace and anneal at 1000 C for 3 hours under a CO reducing atmosphere, cool it, take it out and grind it into fine powder. get fit in violet Excited powder crystals of blue phosphors with dual wavelength emission.

[0048] 2-2. Preparation method of yellow phosphor The chemical composition form...

Embodiment 3

[0053] This embodiment provides a luminescent material, including blue phosphor and yellow phosphor.

[0054] 3-1. Preparation method of blue phosphor

[0055] The chemical composition formula of the blue phosphor is (Sr 8-x-z Mg x ) Si 4 o 8 Cl 12 :zEu 2+ , where x=0.8, z=0.05, the concrete expression (Sr 7.15 Mg 0.8 ) Si 4 o 8 Cl 12 :0.05Eu 2+ .

[0056] ① Weigh the following materials:

[0057] SrCO 3 : 2.325g, SrCl 2 ·6H 2 O: 5.3324g, SiO 2 : 1.204g, Eu 2 o 3 : 0.04399g, MgO: 0.1612g;

[0058] ② After fully grinding the above-mentioned weighed materials for 30 minutes, put the mixed powder into an alumina crucible or a carbon crucible, and put it into a high-temperature furnace under 10% H 2 / 90%N 2 Anneal at a high temperature of 1000 C for 3 hours in a reducing atmosphere, cool, take out and grind finely to obtain a Excited powder crystals of blue phosphors with dual wavelength emission.

[0059] 3-2. Preparation method of yellow phosphor

[0060...

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Abstract

The invention provides a luminous material, a preparation method of the luminous material and a white light LED (light emitting diode) device. The luminous material is applicable to purple light or fluorescence excited by a near ultraviolet light LED, and has the advantages of high quantum yield, high thermal stability and adjustable luminous color. The luminous material provided by the invention belongs to a luminous material capable of emitting complementary colors obtained through the preparation by using first chlorophosphates and second chlorophosphates; the first chlorophosphates are (Sr<8-x-z>Mgx)Si4O8Cl12:zEu<2+>, wherein the x is greater than 0 but smaller than or equal to 0.8, and the z is greater than or equal to 0.01 but smaller than or equal to 0.05; the second chlorophosphates is Sr<8-y-t>Cay)Si4O8Cl12:tEu<2+>, wherein the y is greater than 0 is smaller than or equal to 0.6, and the t is greater than or equal to 0.01 but is smaller than or equal to 0.05. The preparation method of the luminous material has the advantages that the preparation method is simple; the operation is easy; no pollution is caused; the cost is low. The white light LED device has the advantages of good average color rendering property, high dark red color development index and brightness.

Description

technical field [0001] The invention belongs to the technical field of luminescence and illumination, and in particular relates to a luminescent material, a preparation method thereof, and a white light LED device. Background technique [0002] Phosphor-converted white light LED (light emitting diode) is currently recognized by the lighting industry as the simplest and most effective 'green' solid-state lighting device, and it is expected to completely replace the current traditional lighting source in the future. Currently commercial phosphor-converted white LEDs mainly use blue LEDs to excite yellow phosphors (YAG:Ce 3+ )accomplish. However, the white light produced by this type of white LED has the problems of low color rendering (<80), high color temperature (>7000K) and uneven distribution of color space, which limits this type of device to be only suitable for some color rendering of light sources. Sexually undemanding venues. Violet light or near-ultraviolet ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/61C09K11/66H01L33/50
CPCC09K11/665C09K11/7734H01L33/502H01L2933/0041
Inventor 戴鹏鹏艾尔肯·斯地克祝恒江
Owner XINJIANG NORMAL UNIVERSITY
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