A high-efficiency infrared excitation up-conversion luminescent material and its preparation method

A luminescent material, infrared excitation technology, applied in luminescent materials, chemical instruments and methods, etc., can solve problems such as environmental pollution and toxic fluoride, and achieve the effect of improving luminous efficiency, good crystallinity and stable performance

Active Publication Date: 2018-08-31
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, fluoride itself is toxic and pollutes the environment

Method used

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  • A high-efficiency infrared excitation up-conversion luminescent material and its preparation method
  • A high-efficiency infrared excitation up-conversion luminescent material and its preparation method
  • A high-efficiency infrared excitation up-conversion luminescent material and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0043] Dissolve 0.357g of hexamethylenetetramine in deionized water to prepare an alkaline solution, then add 0.6316g of yttrium nitrate, and stir thoroughly to obtain a transparent solution. Weigh a certain amount of yttrium nitrate and add it to the above solution, stir well to obtain a transparent solution with a molar ratio of Y:Er=97:3. Then it was placed in a reaction kettle and sealed, and kept at 180°C for 24 hours to obtain a white product. The cooled product was washed, filtered, and dried to obtain a white powder, and then calcined at 700° C. for 4 hours to obtain yttrium oxide crystals doped with erbium ions.

[0044] The obtained erbium-doped yttrium oxide crystals were characterized by XRD diffraction analysis, scanning electron microscope images and up-conversion luminescence spectra, and the characterization results are as follows: Figure 1-3 shown.

[0045] Scanning electron microscope images, such as figure 2 As shown, the morphology of the prepared yttr...

Embodiment 2

[0048] Dissolve 0.7g of urea in deionized water to prepare an alkaline solution, then add 0.6316g of yttrium nitrate, and stir thoroughly to obtain a transparent solution. Weigh a certain amount of erbium carbonate and add it to the above solution, stir well to obtain a transparent solution with a molar ratio of Y:Er=95:5. Then it was placed in a reaction kettle and sealed, and kept at 120°C for 10 hours to obtain a white product. The cooled product was washed, filtered, and dried to obtain a white powder, and then calcined at 500° C. for 3 hours to obtain yttrium oxide crystals doped with erbium ions.

Embodiment 3

[0050] Dissolve 0.7g of urea in deionized water to prepare an alkaline solution, then add 0.4316g of yttrium chloride, and stir thoroughly to obtain a transparent solution. Weigh a certain amount of erbium nitrate and add it to the above solution, stir well to obtain a transparent solution with a molar ratio of Y:Er=97:3. Then it was placed in a reaction kettle and sealed, and kept at 120°C for 10 hours to obtain a white product. The cooled product was washed, filtered, and dried to obtain a white powder, and then calcined at 500° C. for 2 hours to obtain yttrium oxide crystals doped with erbium ions.

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Abstract

The invention discloses a high-efficiency infrared excited up-conversion luminescent material and a preparation method thereof; the material comprises the chemical composition of Y2O3 doped with an erbium element; the morphology of the material is micro-spheres composed of a flaky structure, wherein the number ratio of the micro-spheres with the particle size of 1-6 [mu]m is larger than 95%, and the number ratio of the flaky structure with the thickness of 0.1-0.2 [mu]m is greater than 99%. The method comprises the steps of adding an erbium source and an yttrium source into a homogeneous precipitator solution, carrying out a hydrothermal reaction, and then post-treating to obtain the up-conversion luminescent material. The up-conversion luminescent material has the advantages of stable performance, uniform particle size distribution, good crystallinity and high luminous efficiency.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a high-efficiency up-conversion emission fluorescent material for infrared excitation and a preparation method thereof. Background technique [0002] In recent years, a large number of studies have reported the upconversion luminescence phenomenon of ion-doped materials. Rare earth ions have abundant energy levels in the ultraviolet-visible-infrared range, and these energy levels have long fluorescence lifetimes, so rare earth ions are very suitable as active ions for upconversion luminescent materials. The up-conversion luminescence properties of rare earth ion-doped materials have great application value, and can be widely used in information processing, optical storage, temperature measurement, bioluminescence measurement, solar cells, and laser anti-counterfeiting. [0003] So far, the commonly used host materials for rare earth doped up-conversion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
CPCC09K11/7787
Inventor 吴莉莉赵金博
Owner SHANDONG UNIV
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