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a kind of eu 2+ Doped silicate near-infrared phosphor, preparation method thereof, and conversion LED light-emitting device

A technology of light-emitting device and phosphor powder is applied in the field of optical materials to achieve the effects of low equipment cost, high brightness and high luminous efficiency

Active Publication Date: 2021-08-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But almost no Eu 2+ Research Report on Doping Near Infrared Phosphor Powder

Method used

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  • a kind of eu <sup>2+</sup> Doped silicate near-infrared phosphor, preparation method thereof, and conversion LED light-emitting device
  • a kind of eu <sup>2+</sup> Doped silicate near-infrared phosphor, preparation method thereof, and conversion LED light-emitting device
  • a kind of eu <sup>2+</sup> Doped silicate near-infrared phosphor, preparation method thereof, and conversion LED light-emitting device

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Experimental program
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Embodiment 1

[0033] The chemical composition formula of the near-infrared fluorescent powder of this embodiment is K 3 LuSi 2 o 7 : xEu 2+ , yMgO, where x = 0.02, y = 0. Accurately weigh K according to the stoichiometric ratio of each element in the chemical formula 2 CO 3 , Lu 2 o 3 , SiO 2 , Eu 2 o 3, MgO high-purity powder raw material, put it in an agate mortar and grind for about 30 minutes, so that the raw material is fully mixed and even. Transfer the mixed raw materials to an alumina crucible, cover it and place it in a reducing atmosphere high-temperature reaction furnace for sintering at 1350°C for 4 hours, take it out after natural cooling, and grind it again for about 10 minutes to obtain K 3 LuSi 2 o 7 : 0.02Eu 2+ Phosphor powder, its XRD pattern is as follows figure 1 As shown, it can be seen from the figure that the phosphor is a single phase.

Embodiment 2

[0035] The chemical composition formula of the red phosphor powder for white light LED of this embodiment is K 3 LuSi 2 o 7 : xEu 2+ , yMgO, where x=0.02, y=0.10. Accurately weigh K according to the stoichiometric ratio of each element in the chemical formula 2 CO 3 , Lu 2 o 3 , SiO 2 , Eu 2 o 3 , MgO high-purity powder raw material, put it in an agate mortar and grind for about 30 minutes, so that the raw material is fully mixed and even. Transfer the mixed raw materials to an alumina crucible, cover it and place it in a reducing atmosphere high-temperature reaction furnace for sintering at 1350°C for 4 hours, take it out after natural cooling, and grind it again for about 10 minutes to obtain K 3 LuSi 2 o 7 :0.02Eu 2+ , 0.10MgO phosphor, its XRD pattern is as follows figure 1 As shown, it can be seen from the figure that the phosphor is a single phase.

Embodiment 3-7

[0037] The preparation steps are the same as in Example 1, and its chemical formula, synthesis temperature, and synthesis time are listed in Attached Table 1. The raw materials used in Examples 3 to 7 are oxides or salt compounds of various metal elements, which have no effect on the results. Wherein, the XRD figure of embodiment 1 and 3-4 is as follows figure 2 As shown, it can be seen from the figure that the synthesized phosphors are all in a single phase.

[0038] Example chemical formula x y Calcination temperature / ℃ Calcination time / h Grinding time / min 1 K 3 LuSi 2 o 7 :0.02Eu 2+

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Abstract

The invention discloses a Eu 2+ Doped silicate near-infrared fluorescent powder and its preparation method and near-infrared LED light-emitting device, the general chemical formula of the fluorescent powder is K 3 LuSi 2 o 7 :xEu 2+ ,yMgO,0

Description

technical field [0001] The invention relates to the technical field of optical materials, in particular to a Eu 2+ Doped silicate near-infrared fluorescent powder, a preparation method thereof, and a conversion-type LED light-emitting device. Background technique [0002] Near-infrared light is the non-visible light region that people discovered earlier. Due to the low level of early technology, it was affected by frequency multiplication and frequency combination, resulting in spectral overlap and complex analysis, which led to certain restrictions on the research and application of near-infrared light. Until the 1960s, with the emergence of commercial instruments and a lot of work done by Norris et al., they proposed the theory that the content of the substance was linearly related to the absorption peaks at multiple different wavelength points in the near-infrared region, and used NIR diffuse reflectance technology The determination of moisture, protein, fat and other co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/79H01L33/50
CPCC09K11/7792H01L33/502
Inventor 夏志国乔建伟杨至雨
Owner SOUTH CHINA UNIV OF TECH