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a kind of eu 2+ Ion-doped high-efficiency blue phosphor, preparation method and application thereof

A technology of blue phosphor and ion doping, which is applied in the field of blue phosphor to achieve the effects of low combustion temperature, high powder purity and improved luminous efficiency

Active Publication Date: 2022-03-04
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are relatively few blue phosphors excited by near-ultraviolet light, and most of the phosphors technically stay in the medium and long wavelength (green, red) generation bands. Due to the lack of short-wavelength blue light bands, the overall application of LED still seems a little lacking

Method used

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  • a kind of eu <sup>2+</sup> Ion-doped high-efficiency blue phosphor, preparation method and application thereof
  • a kind of eu <sup>2+</sup> Ion-doped high-efficiency blue phosphor, preparation method and application thereof
  • a kind of eu <sup>2+</sup> Ion-doped high-efficiency blue phosphor, preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] a kind of Eu 2+ The preparation method of ion-doped high-light-efficiency blue phosphor comprises the following steps:

[0039] 1) According to β-Ca 1.95 P 2 o 7 :0.05Eu 2+ The stoichiometric ratio weighs calcium carbonate (1.95g, 19.5mmol), diammonium phosphate (2.64g, 20mmol) and europium oxide (88mg, 0.25mmol);

[0040] 2) Add 20% dilute nitric acid to the weighed calcium carbonate in step 1), then add diammonium hydrogen phosphate, europium oxide, urea (1.2g, 20mmol) and deionized water, and heat the reaction in a water bath at 80°C for 2h to obtain white solid substance;

[0041] 3) Put the white solid substance obtained in step 2) into a muffle furnace, and burn it at 900° C. for 2 hours;

[0042] 4) Lower the temperature and grind for 4 hours to obtain β-Ca 1.95 P 2 o 7 :0.05Eu 2+ High-efficiency blue phosphor.

[0043] For the prepared Eu 2+ Ion-doped high-efficiency blue phosphors were characterized and tested by spectrum. The test results are as foll...

Embodiment 2

[0050] a kind of Eu 2+ The preparation method of ion-doped high-light-efficiency blue phosphor comprises the following steps:

[0051] 1) According to β-Ca 1.955 P 2 o 7 :0.045Eu 2+ The stoichiometric ratio weighs calcium carbonate (0.98g, 9.78mmol), diammonium hydrogen phosphate (1.32g, 10mmol) and europium oxide (39.6mg, 0.112mmol);

[0052] 2) Add 10% dilute nitric acid to the weighed calcium carbonate in step 1), then add diammonium hydrogen phosphate, europium oxide, urea (1.2g, 20mmol) and deionized water, and heat the reaction in a water bath at 60°C for 3h to obtain white solid substance;

[0053] 3) Put the white solid substance obtained in step 2) into a muffle furnace, and burn it at 850° C. for 4 hours;

[0054] 4) Lower the temperature and grind for 5 hours to obtain β-Ca 1.955 P 2 o 7 :0.045Eu 2+ High-efficiency blue phosphor.

Embodiment 3

[0056] a kind of Eu 2+ The preparation method of ion-doped high-light-efficiency blue phosphor comprises the following steps:

[0057] 1) According to β-Ca 1.945 P 2 o 7 :0.055Eu 2+ The stoichiometric ratio weighs calcium carbonate (1.95g, 19.45mmol), diammonium hydrogen phosphate (2.64g, 20mmol) and europium oxide (96.8mg, 0.275mmol);

[0058] 2) Add 30% dilute nitric acid to the weighed calcium carbonate in step 1), then add diammonium hydrogen phosphate, europium oxide, urea (3.6g, 60mmol) and deionized water, and heat the reaction in a water bath at 70°C for 2.5h, A white solid substance was obtained;

[0059] 3) put the white solid substance obtained in step 2) into a muffle furnace, and burn it at 950° C. for 1 hour;

[0060] 4) Lower the temperature and grind for 6 hours to obtain β-Ca 1.945 P 2 o 7 :0.055Eu 2+ High-efficiency blue phosphor.

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Abstract

The invention discloses a Eu 2+ Ion-doped high-efficiency blue phosphor and its preparation method and application. Eu 2+ The composition expression of the ion-doped high-efficiency blue phosphor is β‑Ca 2‑ x P 2 o 7 :xEu 2+ , x is Eu 2+ Ions replace Ca 2+ Doping moles of ions, x=0.045‑0.055. The high light efficiency blue fluorescent powder is prepared by urea combustion method. The high-light-efficiency blue fluorescent powder has high purity, good particle consistency and good thermal stability, is a blue fluorescent powder excited by ultraviolet light, and can be used as the blue powder of the three primary colors of white LEDs. The preparation method has the advantages of simple operation, mild conditions, easy control, high preparation efficiency, less energy consumption, and is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of blue fluorescent powder, in particular to a Eu 2+ Ion-doped high-efficiency blue phosphor and its preparation method and application. Background technique [0002] With the development of lighting technology, the research of LED is becoming more and more mature. At present, there are two main methods for obtaining white light LEDs: one is that blue LED chips directly excite yellow phosphor powder, and the light emitted by the two is mixed to form white light. This method is currently the most mature, but the white light obtained in this way lacks the red part, which will lead to poor color rendering and high color temperature of the emitted light. The other is that under the excitation of ultraviolet light, the light emitted by three colors of phosphors (red, blue, green) is mixed together to form white light. The white LED produced by this excitation method has color rendering and luminous efficiency. High, ene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78H01L33/50
CPCH01L33/502C09K11/7738
Inventor 王忆周勤勤李永恒
Owner WUYI UNIV
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