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Oxide-based up-conversion fluorescent material and preparation method thereof

A fluorescent material and oxide-based technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of low chemical stability and mechanical strength of fluoride, low phonon energy chemical stability, difficulty in preparation and application, etc. Achieve the effects of easy large-scale promotion and production application, low price, and simple and easy preparation process

Inactive Publication Date: 2019-07-26
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Rare earth fluorides have low phonon energy and high chemical stability, and are widely used in the preparation of various high-efficiency rare earth doped up-conversion materials, but the chemical stability and mechanical strength of fluorides are lower than those of oxides, and fluorine Compounds generally have certain toxicity, which brings certain difficulties to preparation and application.

Method used

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  • Oxide-based up-conversion fluorescent material and preparation method thereof
  • Oxide-based up-conversion fluorescent material and preparation method thereof
  • Oxide-based up-conversion fluorescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] According to the chemical formula Ca 2 sn 2 al 2 o 9 :0.005Er 3+ Weigh Ca(CH 3 COO) 2 ·H 2 O, SnCl 2 2H 2 O, Al(NO 3 ) 3 9H 2 O, Er(NO 3 ) 3 ·5H 2 O, put it into a beaker, and prepare the sample according to the above-mentioned combustion method.

[0071] According to the chemical formula Ca 2 sn 2 al 2 o 9 :0.005Er 3+ ,0.02Yb 3+ Weigh Ca(CH 3 COO) 2 ·H 2 O, SnCl 2 2H 2 O, Al(NO 3 ) 3 9H 2 O, Er(NO 3 ) 3 ·5H 2 O, Yb 2 o 3 Put it into a beaker, and prepare the sample according to the above-mentioned combustion method.

[0072] Utilize the fluorescence spectrometer to analyze the oxide-based up-conversion material obtained in this example, and obtain its up-conversion luminescence spectrum, as shown in figure 1 as shown, figure 1 Sensitizer Yb is shown 3+ The incorporation of ions reduces the intensity of the green light emitting band of the oxide-based up-conversion fluorescent material, and enhances the intensity of the red light emit...

Embodiment 2

[0074] According to the chemical formula Ca 2 sn 2 al 2 o 9 :0.005Ho 3+ Weigh Ca(CH 3 COO) 2 ·H 2 O, SnCl 2 2H 2 O, Al(NO 3 ) 3 9H 2 O. Ho 2 o 3 , put it into a beaker, and prepare the sample according to the above-mentioned combustion method.

[0075] According to the chemical formula Ca 2 sn 2 al 2 o 9 :0.005Ho 3+ ,0.02Yb 3+ Weigh Ca(CH 3 COO) 2 ·H 2 O, SnCl 2 2H 2 O, Al(NO 3 ) 3 9H 2 O. Ho 2 o 3 , Yb 2 o 3 Put it into a beaker, and prepare the sample according to the above-mentioned combustion method.

[0076] The oxide-based up-conversion material obtained in this example is analyzed by a fluorescence spectrometer to obtain its up-conversion luminescence spectrum, as shown in figure 2 as shown, figure 2 Sensitizer Yb is shown 3+ The incorporation of ions makes the oxide-based up-conversion fluorescent material appear in the green luminescent band, and the intensity of the red luminescent band is significantly enhanced, which can be adjus...

Embodiment 3

[0078] According to the chemical formula Ca 2 sn 2 al 2 o 9 :0.005Tm 3+ Weigh Ca(CH 3 COO) 2 ·H 2 O, SnCl 2 2H 2 O, Al(NO 3 ) 3 9H 2 O, Tm 2 o 3 , put it into a beaker, and prepare the sample according to the above-mentioned combustion method.

[0079] According to the chemical formula Ca 2 sn 2 al 2 o 9 :0.005Tm 3+ ,0.02Yb 3+ Weigh Ca(CH 3 COO) 2 ·H 2 O, SnCl 2 ,·2H 2 O, Al(NO 3 ) 3 9H 2 O, Tm 2 o 3 , Yb2 o 3 Put it into a beaker, and prepare the sample according to the above-mentioned combustion method.

[0080] Utilize the fluorescence spectrometer to analyze the oxide-based up-conversion material obtained in this example, and obtain its up-conversion luminescence spectrum, as shown in image 3 as shown, image 3 Sensitizer Yb is shown 3+ The incorporation of ions makes the oxide-based up-conversion fluorescent material appear Tm 3+ up-conversion luminescence. Thus by adjusting Yb 3+ Doping amount to modulate Tm 3+ The up-conversion lumi...

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Abstract

The invention discloses an oxide-based up-conversion fluorescent material. The chemical formula of the oxide-based up-conversion fluorescent material is shown in a formula (I): A2SnB2O9: xM, yN (I); wherein, A is one or a combination of more than two of Ca, Sr or Ba; B is Al and / or Ga; and M is an activator ion, N is a sensitizer ion, x and y are molar doping amounts of M and N respectively, 0 < x< / = 0.6, and 0 < / = y < / = 0.6. The oxide of the formula (I) is used for the up-conversion fluorescent material for the first time, and the oxide-based up-conversion fluorescent material is doped withrare earth ions with rich energy levels and long energy level service life and the sensitizer ions, so that anti-Stokes luminescence is realized, and visible light emission can be realized by using near infrared light as an excitation light source. In addition, the preparation raw materials are low in price, low in equipment requirements, simple and feasible in preparation process, good in repeatability, and high in stability of obtained products, so that the material is easy to popularize and produce and apply on a large scale.

Description

technical field [0001] The present invention relates to the technical field of inorganic photoluminescent materials, and more specifically relates to an oxide-based up-conversion fluorescent material and a preparation method thereof. Background technique [0002] Up-conversion luminescence technology is essentially anti-Stokes luminescence, also known as up-conversion luminescence, that is, light with long wavelength and low frequency excites light with short wavelength and high frequency. Up-conversion luminescent particles are usually composed of matrix materials, activators, and sensitizers. An ideal host material has low phonon energy and relatively stable chemical properties to reduce non-radiation loss and effectively improve upconversion efficiency. [0003] Most up-converting host materials are currently fluorides and oxides. Rare earth fluorides have low phonon energy and high chemical stability, and are widely used in the preparation of various high-efficiency ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66
CPCC09K11/7766C09K11/7774C09K11/7706C09K11/77
Inventor 胡义华周新全居桂方窦晓静
Owner GUANGDONG UNIV OF TECH
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