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White-light infrared up-conversion composite luminescent material with core-shell structure

An infrared up-conversion and luminescent material technology, which is applied in the field of chemical new material preparation, and can solve the problem of inability to realize sensitive excitation and luminescence of invisible far-infrared lasers.

Inactive Publication Date: 2017-09-15
SHANGHAI KERUN PHOSPHOR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The known up-conversion luminescent materials and electron-capturing luminescent materials are mainly doped rare earth activators such as rare earth fluoride and strontium calcium sulfide. After absorbing near-infrared energy, they emit light, but they cannot be sensitive to invisible far-infrared lasers. Stimulated luminescence, Chinese patent 85100247, Chinese patent 01142151.7, Chinese patent 96122293.X, Chinese patent 01138927.3, Chinese patent 01138920.6, Chinese patent 200710023804.3, Chinese patent 200610103418.0, US5541012, US7646648 brand 2, HT5 2, 8 products on the market have been disclosed; HT111 is also fully introduced

Method used

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  • White-light infrared up-conversion composite luminescent material with core-shell structure
  • White-light infrared up-conversion composite luminescent material with core-shell structure
  • White-light infrared up-conversion composite luminescent material with core-shell structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 2.282 g of hydrated cadmium chloride solid particles, place in a three-necked flask, add 500 ml of deionized water and stir for standby, then weigh 2.124 g of mercaptosuccinic acid, stir and dissolve for standby, and adjust the pH of the solution to 11 with NaOH after complete dissolution.

[0025] Separately take 0.254g of sodium borohydride and put it in a beaker, add 50ml of deionized water to dissolve it, and then add SeO 2 The particles were 0.223g, and the reaction was stirred for 30min.

[0026] Set the heating jacket temperature to 300 0 C, after constant temperature, add the solution in the beaker to the three-necked flask, pass nitrogen, add a condenser tube, and react at constant temperature for 3 hours. After the reaction is completed, close the heating mantle and cool to room temperature to obtain an aqueous quantum dot solution, and then take 50ml of the quantum dot solution, Add 50 ml of cyclohexanol solution, extract to obtain quantum dot solid part...

Embodiment 2

[0029] Weigh 4.602 g of hydrated cadmium chloride solid particles, place in a three-necked flask, add 200 ml of deionized water and stir for standby, then weigh 4.281 g of mercaptosuccinic acid, stir and dissolve for standby, and adjust the pH of the solution to 10 with NaOH after complete dissolution.

[0030] Another 0.567 g of sodium borohydride was placed in a beaker, 50 ml of deionized water was added to dissolve, and then 0.262 g of tellurium powder particles were added, and the reaction was stirred for 30 min.

[0031] Set the heating jacket temperature to 300 0 C, after constant temperature, add the solution in the beaker to the three-necked flask, pass nitrogen, add a condenser, and react at constant temperature for 3 hours. After the reaction is completed, close the heating mantle and cool to room temperature to obtain an aqueous quantum dot solution, and then take 20ml of the quantum dot solution, Add 100 ml of isopropanol solution, extract to obtain quantum dot sol...

Embodiment 3

[0034] Preparation of blue-emitting infrared upconversion nanomaterials: take YF 3 90g, GdF 3 10g, add YbF 3 45g, TmF 3 13g at 400 under argon 0 C was sintered for 2 hours, and the prepared infrared up-conversion fluorescent material was excited by laser at 980 nm, and could emit blue light at 450 nm, and the particles were at 100 nm.

[0035] Take out 30g of the above infrared up-conversion fluorescent material and add it to the three-necked flask, then add 100ml of ethylene glycol, stir and disperse evenly, and then add 0.5g of 3-aminopropyltrimethoxysilane as the surface silanization material, under the protection of nitrogen at 60 0 The reaction was stirred at a constant temperature for 10 hours. After the reaction was completed, it was washed with anhydrous ethanol until neutral, and then diluted to 100ml with deionized water. Then 0.2g of glutaraldehyde was added as the surface aldehyde-based material, and the nitrogen was protected. The reaction was stirred at low t...

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Abstract

The invention provides a white-light infrared up-conversion composite luminescent material with a core-shell structure. The composite material is characterized in that an infrared up-conversion nano-material is used as a core structure of the composite material; a quantum dot material with orange red fluorescence characteristics is used as a shell structure of the composite material; a chemical hydrothermal reaction is carried out so as to synthesize the white-light-emitting infrared up-conversion composite luminescent material with the core-shell structure; light with a wavelength of 980 nm is used as infrared excitation light; and the up-conversion nano-material is allowed to emit blue light under infrared excitation, and then quantum dots are allowed to emit orange red light under excitation of up-conversion blue light, so the infrared up-conversion composite luminescent material emitting white light is obtained. Since rare-earth up-conversion luminescent materials and semiconductor quantum dots are wide in photoluminescent band, high in color purity, brilliant in color, strong in light absorption capability, high in conversion efficiency, wide in the distribution area of emission wavelength, stable in physical and chemical performance, resistant to high temperature and capable of withstanding the action of large-power electron beams, high-energy radiation and strong ultraviolet light, the rare-earth up-conversion luminescent materials and semiconductor quantum dots are extensively applied to fields like illumination, displaying, development, medical radiography, detection and recording of radiation fields, etc., large in the scale of industrial production and consumer market and further applied to other emerging technical fields.

Description

technical field [0001] The invention belongs to the field of chemical new material preparation. Background technique [0002] The preparation and application of infrared up-conversion luminescent materials are based on the detection of near-infrared light. The field of laser detection has been widely used, but people still cannot accurately and intuitively monitor the laser beam spot in scientific research and industrial use. When people want to explore new technologies beyond the high-cost camera method and photographic paper method, the use of luminescent materials has become the most important. One of the effective alternative technical means. [0003] At present, infrared light-emitting materials have basically matured in the basic theory of light-emitting, and the preparation methods of materials in the laboratory are also relatively complete. At present, the research goals at home and abroad mainly focus on improving the luminous efficiency, testing the accurate quan...

Claims

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Application Information

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IPC IPC(8): C09K11/02C09K11/88C09K11/85
CPCC09K11/02C09K11/7772C09K11/883Y02B20/00
Inventor 郭素文郑岩宋丹丹祝燕范翊林杰陈磊边静宇刘星元乔泊刘洁余锡宾赵谡玲林长青
Owner SHANGHAI KERUN PHOSPHOR TECH
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