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A kind of phosphate-based phosphor material and its preparation method and application

A phosphor and phosphate technology, applied in luminescent materials, chemical instruments and methods, semiconductor devices, etc., can solve the problems of less research on phosphor materials, no corresponding fields, mature products, etc., and achieve good luminescence thermal stability. , wide spectrum, easy to operate

Active Publication Date: 2022-03-08
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the research on phosphor materials is mainly concentrated in the visible light region. There are few researches on phosphor materials that can be effectively excited by blue light chips and emit broadband near-infrared light. There are no corresponding mature products in various fields.

Method used

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  • A kind of phosphate-based phosphor material and its preparation method and application
  • A kind of phosphate-based phosphor material and its preparation method and application
  • A kind of phosphate-based phosphor material and its preparation method and application

Examples

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Embodiment 1

[0031] A phosphate-based phosphor material, the chemical expression of the phosphor is LiAl 0.99 P 2 o 7 : 0.01Cr, its preparation steps are as follows:

[0032] 1. Accurately weigh raw material Li 2 CO 3 0.5mmol, Al 2 o 3 0.495mmol, NH 4 h 2 PO 4 2mmol, Cr 2 o 3 0.005mmol;

[0033] 2. Fully mix the weighed raw materials, burn in the air at 800°C for 6 hours, and cool to room temperature with the furnace to obtain the burnt product;

[0034] 3. Fully grind the obtained calcined product into powder and pass through a 200-mesh sieve, wash once with deionized water, and dry at 60°C to obtain the LiAl of the present invention 0.97 P 2 o 7 : 0.01Cr phosphate-based phosphor material.

[0035] The excitation spectrum and emission spectrum of this embodiment are as attached figure 1 It can be seen from the figure that the phosphor material in this embodiment can be excited by visible light in the range of 400-520nm and 550-780nm, and emit broadband near-infrared lig...

Embodiment 2

[0037] A phosphate-based phosphor material whose chemical expression is NaGa 0.98 P 2 o 7 : 0.02Cr, its preparation steps are as follows:

[0038] 1. Accurately weigh the raw material Na 2 CO 3 0.5mmol, Ga 2 o 3 0.49mmol, NH 4 h 2 PO 4 2mmol, Cr 2 o 3 0.01mmol;

[0039] 2. Fully mix the weighed raw materials, burn in the air at 900°C for 8 hours, and cool to room temperature with the furnace to obtain the burnt product;

[0040]3. Fully grind the roasted product into powder and pass through a 200-mesh sieve, wash twice with deionized water, and dry at 80°C to obtain the NaGa powder of the present invention. 0.97 P 2 o 7 : 0.02Cr phosphate-based phosphor material.

[0041] The excitation spectrum and emission spectrum of this embodiment are as attached figure 2 It can be seen from the figure that the phosphor material in this embodiment can be excited by visible light in the range of 400-520nm and 550-780nm, and emit broadband near-infrared light in the rang...

Embodiment 3

[0043] A phosphate-based phosphor material whose chemical expression is KIn 0.97 P 2 o 7 : 0.03Cr, its preparation steps are as follows:

[0044] 1. Accurately weigh raw material K 2 CO 3 0.5mmol, In 2 o 3 0.485mmol, NH 4 h 2 PO 4 2mmol, Cr 2 o 3 0.015mmol;

[0045] 2. Fully mix the weighed raw materials, burn in the air at 1100°C for 10 hours, and cool to room temperature with the furnace to obtain the burnt product;

[0046] 3. Fully grind the roasted product into powder and pass through a 200-mesh sieve, wash with deionized water for 3 times, and dry at 80°C to obtain the KIn 0.97 P 2 o 7 : 0.03Cr phosphate-based phosphor material.

[0047] The excitation spectrum and emission spectrum of this embodiment are as attached image 3 It can be seen from the figure that the phosphor material in this embodiment can be excited by visible light in the range of 400-520nm and 550-800nm, and emit broadband near-infrared light in the range of 750-1050nm.

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Abstract

The invention discloses a phosphate-based phosphor material and its preparation method and application. The chemical expression of the phosphor material is AB 1‑x P 2 o 7 : xCr, wherein A is at least one of Li, Na, K, 0.01≤x≤0.1; its preparation method is as follows: 1) accurately weigh raw materials according to the chemical dosage ratio of the above-mentioned phosphate-based phosphor material; 2) weigh The raw materials taken are mixed well and evenly, and the mixture is fired at high temperature in an air atmosphere to obtain a fired product; 3) the fired product is ground into powder, and then washed and dried to obtain the phosphate-based phosphor material. The phosphor material of the present invention can be effectively excited by the blue LED chip, and emit 750-1100nm broadband near-infrared light, has good chemical stability, excellent luminous performance, and the preparation method is simple, easy to operate, low in cost, and pollution-free. It is suitable for industrialized mass production.

Description

technical field [0001] The invention relates to a phosphate-based phosphor material, a preparation method and application thereof, and belongs to the technical field of solid luminescent materials. Background technique [0002] Near-infrared light sources have a wide range of applications in food testing, minimally invasive diagnosis, biological imaging, solar cells, and spectral testing. Currently commercial near-infrared light sources mainly include tungsten incandescent lamps, near-infrared lasers, and near-infrared LEDs. Among them, tungsten filament incandescent lamps can provide an ultra-wide continuous light source from visible light to near-infrared light, but they have short service life, large volume, high operating temperature, and low luminous efficiency in the near-infrared part; The intensity is high, but it has the intrinsic characteristic of a narrow emission band coverage. For applications that require miniaturization and broadband emission of near-infrare...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/70H01L33/50
CPCC09K11/701H01L33/502
Inventor 邵起越徐小雪姚乐琪董岩蒋建清
Owner SOUTHEAST UNIV
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