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Near-infrared fluorescent powder, preparation and application method thereof, near-infrared light source and preparation method of near-infrared white light source

A fluorescent powder and near-infrared technology, which is applied to optical elements, light sources, chemical instruments and methods for changing the spectral characteristics of emitted light, and can solve the problems of narrow bandwidth, small volume, and large volume of near-infrared light

Active Publication Date: 2020-04-28
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a traditional infrared light source, tungsten lamp itself has the advantages of wide emission spectrum and high brightness, but its efficiency is low, its volume is large, its life is short, and its spectrum contains a large amount of visible light. In contrast, infrared LEDs and infrared lasers have high efficiency. , small size, these two near-infrared light sources have been rapidly popularized in related applications in recent years
However, the bandwidth of near-infrared light emitted by infrared LEDs and infrared lasers is very narrow, which limits some applications that require broadband near-infrared fields

Method used

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  • Near-infrared fluorescent powder, preparation and application method thereof, near-infrared light source and preparation method of near-infrared white light source
  • Near-infrared fluorescent powder, preparation and application method thereof, near-infrared light source and preparation method of near-infrared white light source
  • Near-infrared fluorescent powder, preparation and application method thereof, near-infrared light source and preparation method of near-infrared white light source

Examples

Experimental program
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Effect test

Embodiment 1

[0068] According to the general chemical formula Ca of the near-infrared fluorescent powder 1.06 Lu 1.94 Cr 0.06 Mg 1.94 Si 3 o 12 The stoichiometric ratio of each element in CaCO is weighed 3 、Lu 2 o 3 , MgO, SiO 2 and Cr 2 o 3 , after fully grinding and mixing, put it into a high-purity corundum crucible, wrap it in carbon powder, keep it warm at 1320°C for 8 hours, cool and discharge the material, grind it a little, wash, filter, and dry, and then it has broadband emission characteristics. near-infrared phosphors.

[0069] Carry out XRD analysis to the near-infrared fluorescent powder that embodiment 1 obtains, and XRD diffraction pattern is as follows figure 1 shown; from figure 1 It can be seen from the curve in that the phosphor has a garnet structure.

[0070] The emission spectrum and the excitation spectrum of the near-infrared fluorescent powder that embodiment 1 obtains are analyzed, and the results are as follows: figure 2 shown, from figure 2 It c...

Embodiment 2

[0073] According to the general chemical formula Ca of the near-infrared fluorescent powder 1.05 Lu 1.95 Cr 0.05 Mg 1.95 Si 3 o 12 The stoichiometric ratio of each element in CaCO is weighed 3 、Lu 2 o 3 , MgO, SiO 2 and Cr 2 o 3 , after fully grinding and mixing, put it into a high-purity corundum crucible, and keep it warm at 1320°C for 8 hours in an air atmosphere. near-infrared phosphors.

[0074]Comparing the emission spectra of Example 1 and Example 2, it can be seen that the luminescence peak position can be effectively adjusted by adjusting the components, which helps to realize the adjustable emission of the light source.

[0075] Mix the near-infrared fluorescent powder of Example 2 with 490nm blue-green fluorescent powder, 535nm green fluorescent powder and 660nm red fluorescent powder in a mass ratio of 20:1:10:1, and mix with epoxy resin to obtain fluorescent powder-containing glue (phosphor powder mass fraction 40%), first bond and fix the 460nm blue L...

Embodiment 3

[0077] According to the general chemical formula Ca of the near-infrared fluorescent powder 2.8 Lu 0.2 Cr 0.05 sc 1.75 Mg 0.2 Si 3 o 12 The stoichiometric ratio of each element in CaCO is weighed 3 、Lu 2 o 3 , MgO, SiO 2 and Cr 2 o 3 , after fully grinding and mixing, put it into a high-purity corundum crucible, and keep it warm at 1320°C for 8 hours in a vacuum atmosphere. near-infrared phosphors.

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Abstract

The invention relates to the field of fluorescent powder, and discloses near-infrared fluorescent powder with broadband near-infrared band emission characteristics, preparation and application methodsthereof, a near-infrared light source and a near-infrared white light source preparation method. The general chemical formula of the near-infrared fluorescent powder is (RxLnyCecAz)(LaMgyCrbMc)B3O12,wherein R is selected from at least one of Ca 2+>, Sr<2+> and Ba<2+>; Ln is at least one of Lu<3+>, Y<3+>, La<3+> and Gd<3+>; A is selected from at least one of Nd<3+>, Yb <3+>, Tm<3+>, Er<3+>, Ho<3+> and Dy<3+>; L is at least one of Sc<3+> and Y<3+>; M is at least one of Li<+>, Na<+>, K<+>, Rb<+> and Cs<+>; B is at least one of Si<4+>, Ge<4+> and Sn<4+>; wherein a, b, c, x, y and z are stoichiometric numbers of the elements, x is greater than or equal to 1 and less than 3, y is greater than 0 and less than or equal to 2, z is greater than or equal to 0 and less than or equal to 0.2, a is greater than or equal to 0 and less than 2, b is greater than or equal to 0.01 and less than or equal to 0.2, c is greater than or equal to 0 and less than or equal to 0.1, the sum of x, y, c, z is 3, and the sum of a, y, b and c is 2. The near-infrared fluorescent powder has the advantages of high efficiency, adjustable light emitting wavelength, broadband near-infrared emission and the like.

Description

technical field [0001] The invention relates to the technical field of near-infrared fluorescent powder, in particular to a near-infrared fluorescent powder with broadband near-infrared band emission characteristics, a preparation and application method, a near-infrared light source and a preparation method for a near-infrared white light source. Background technique [0002] Near-infrared light sources are a widely used light source today due to their optical properties. For example, in the near-infrared face recognition technology, using a near-infrared light source as an active light source to irradiate the face before the infrared camera imaging can effectively improve the recognition rate of the imaging. In addition, taking advantage of the different absorption characteristics of near-infrared light in different states of hemoglobin in the body, the infrared light source can be used to non-destructively detect the relevant conditions of blood in the body. In addition, ...

Claims

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Application Information

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IPC IPC(8): C09K11/79F21K9/64F21K9/90F21V9/38F21Y115/10
CPCC09K11/7708C09K11/7776F21K9/90F21K9/64F21Y2115/10F21V9/38
Inventor 张家骅肖含张亮亮吴昊张霞
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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