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Near-infrared fluorescent powder with broadband emission characteristics, and preparation method and applications thereof

A technology of emission characteristics and phosphors, applied in luminescent materials, chemical instruments and methods, electrical components, etc., can solve problems such as limited application and narrow infrared light bandwidth, and achieve the effect of making up for narrow bandwidth and enhancing absorption.

Active Publication Date: 2018-08-21
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the bandwidth of infrared light emitted by infrared LEDs and infrared lasers is very narrow, which limits its application in some fields.

Method used

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  • Near-infrared fluorescent powder with broadband emission characteristics, and preparation method and applications thereof
  • Near-infrared fluorescent powder with broadband emission characteristics, and preparation method and applications thereof
  • Near-infrared fluorescent powder with broadband emission characteristics, and preparation method and applications thereof

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preparation example Construction

[0034] The preparation method of the near-infrared fluorescent powder with broadband emission characteristics of the present invention comprises the following steps:

[0035] Step 1, weigh and weigh Ca containing 2+ Compounds containing Ln 3+ Compounds containing Zr 2+ compounds containing Al 3+ compounds containing Cr 3+ Compounds and containing Ce 2+ compound, ground and mixed uniformly to obtain a mixture;

[0036] Which, usually, contains Ca 2+ Compounds containing Ca 2+One or any combination of oxides, carbonates, nitrates, halides; containing Lu 3+ Compounds containing Lu 3+ One of the oxides, carbonates, nitrates, halides or any combination thereof; containing Zr 2+ Compounds containing Zr 2+ One of the oxides, carbonates, nitrates, halides or any combination thereof; containing Al 3+ Compounds containing Al 3+ One or any combination of oxides, carbonates, nitrates, halides; containing Cr 3+ The compound contains Cr 3+ One of the oxides, carbonates, nitrat...

Embodiment 1

[0044] Ca 2.02 Lu 0.98 Zr 1.98 Al 3 o 12 :0.02Cr 3+ Preparation method: weigh CaCO according to the stoichiometric ratio 3 、Lu 2 o 3 , ZrO 2 、Al 2 o 3 and Cr 2 o 3 , after fully grinding and mixing, put it into a high-purity corundum crucible, 2 and N 2 Under the mixed gas of 1400°C for 5 hours, after cooling and discharging, grind a little, wash, filter, and dry to obtain near-infrared phosphors with broadband emission characteristics.

[0045] 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 that the phosphor is a pure phase of Ca 2 Zr 2 Al 3 o 12 structure.

[0046] 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 and image 3 shown, from figure 2 It can be seen that the phosphor contains three effective...

Embodiment 2

[0049] Ca 2.02 Lu 0.96 Zr 1.98 Al 3 o 12 :0.02Cr 3+ ,0.02Ce 3+ Preparation method: weigh CaCO according to the stoichiometric ratio 3 、Lu 2 o 3 , ZrO 2 、Al 2 o 3 , CeO 2 and Cr 2 o 3 , after fully grinding and mixing the weighed raw materials, put them into a high-purity corundum crucible, under the condition of CO reduction, keep warm at 1600 ° C for 4 hours, after cooling and discharging, grind a little, wash, filter, and dry to obtain Near-infrared phosphors with broadband emission characteristics.

[0050] Mix the near-infrared fluorescent powder in Example 2 with epoxy resin glue to obtain the fluorescent powder-containing glue, first coat the fluorescent powder-containing glue on the 410nm blue LED chip, and then bond and fix the LED chip on a 19× The 19mm mirror aluminum COB bracket is connected to the positive and negative poles of the bracket through gold wires to obtain a near-infrared LED light source. Analyze the emission characteristics of the near...

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Abstract

The invention discloses a near-infrared fluorescent powder with broadband emission characteristics, and a preparation method and applications thereof, and belongs to the technical field of luminescentmaterial. The near-infrared fluorescent powder with broadband emission characteristics is suitable for near ultraviolet light and blue light chip excitation. The general chemical formula of the near-infrared fluorescent powder is Ca<2+x>Ln<1-x-y>Zr<2-x>Al<3>O<12>:xCr<3+>, yCe<3+>, and Cr<3+> is taken as a luminescence center, wherein Ln is used for representing one or a plurality of ions selectedfrom Y<3+>, Lu<3+>, and Gd<3+>, x and y are used for representing molar fractions, 0<x<=0.15, and 0<=y<=0.1. The near-infrared fluorescent powder can be taken as a light conversion material of near ultraviolet light LED chips or blue light LED chips, can be used for preparation of broadband near-infrared light sources, and is capable of satisfying requirements of blood oxygen detection or coherence tomography on infrared light sources with broadband emission characteristics.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a near-infrared fluorescent powder with broadband emission characteristics and a preparation method and application thereof. Background technique [0002] In the context of the rapid development of various emerging needs, near-infrared light sources have received great attention from everyone. For example, in the field of face recognition, the infrared light source is used as an active light source to irradiate the face, and then the image is imaged by the camera, which can overcome the influence of different ambient light on the imaging. In addition, infrared light is invisible to human eyes, will not interfere with human eyes, and will not reduce user comfort. Therefore, infrared light face recognition technology has become the mainstream solution of face recognition technology. In addition, taking advantage of the different characteristics of human ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80H01L33/50
CPCC09K11/7706C09K11/7774H01L33/502
Inventor 张亮亮张晟张家骅张霞郝振东潘国徽武华君
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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