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Application of non-self-absorption nanocrystalline as scintillator and preparation method of non-self-absorption nanocrystalline

A technology of nanocrystals and scintillators, applied in nanotechnology, nano-optics, nanotechnology, etc., can solve the problems that hinder the commercialization of perovskite nanocrystal scintillators, the accumulation of lead elements, environmental pollution, etc., and achieve the benefit of X-rays The effect of simple detection and experimental operation and low requirements for experimental conditions

Inactive Publication Date: 2020-06-30
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, because the lead-based perovskite scintillator contains the toxic element lead, it will pollute the environment, and the lead element will accumulate in the human body, resulting in human poisoning
Therefore, the presence of lead element has greatly hindered the commercialization prospects of perovskite nanocrystalline scintillators.

Method used

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  • Application of non-self-absorption nanocrystalline as scintillator and preparation method of non-self-absorption nanocrystalline
  • Application of non-self-absorption nanocrystalline as scintillator and preparation method of non-self-absorption nanocrystalline
  • Application of non-self-absorption nanocrystalline as scintillator and preparation method of non-self-absorption nanocrystalline

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Embodiment 1

[0055] The present invention provides a non-self-absorbing Cs 3 Cu 2 I 5 A method for preparing a nanocrystalline thin film scintillator. The method includes: the Cs 3 Cu 2 I 5 The nanocrystals were dispersed in n-hexane solvent, and the above Cs 3 Cu 2 I 5 The nanocrystal solution is drip-coated on the glass sheet, and the n-hexane solvent is naturally evaporated to dryness, and then the nanocrystal solution is drip-coated on the glass sheet, and then evaporated to dryness naturally. The above steps are repeated several times to form a non-self-absorbed Cs 3 Cu 2 I 5 Nanocrystalline thin-film scintillators for X-ray imaging.

[0056] The method specifically includes the following steps:

[0057] (1) the Cs 3 Cu 2 I 5 Nanocrystals are dispersed in n-hexane solvent, the dispersion concentration is 50mg / mL;

[0058] (2) The above Cs 3 Cu 2 I 5 The nanocrystal solution is drip-coated on the glass sheet, and the n-hexane solvent is naturally evaporated to dryness...

Embodiment 2

[0068] The present invention provides a non-self-absorbing Cs 3 Cu 2 Cl 5 A method for preparing a nanocrystalline thin film scintillator. The method includes: the Cs 3 Cu 2 Cl 5 The nanocrystals were dispersed in n-hexane solvent, and the above Cs 3 Cu 2 Cl 5 The nanocrystal solution is drip-coated on the glass sheet, and the n-hexane solvent is naturally evaporated to dryness, and then the nanocrystal solution is drip-coated on the glass sheet, and then evaporated to dryness naturally. The above steps are repeated several times to form a non-self-absorbed Cs 3 Cu 2 Cl 5 Nanocrystalline scintillator films for X-ray imaging.

[0069] The method specifically includes the following steps:

[0070] (1) the Cs 3 Cu 2 Cl 5 Nanocrystals are dispersed in n-hexane solvent, the dispersion concentration is 40-50mg / mL;

[0071] (2) The above Cs 3 Cu 2 Cl 5 The nanocrystal solution is drip-coated on the glass sheet, and the n-hexane solvent is naturally evaporated to dry...

Embodiment 3

[0073] The present invention provides a non-self-absorbing Cs 3 Cu 2 Br 5 A method for preparing a nanocrystalline thin film scintillator. The method is by adding Cs 3 Cu 2 Br 5 The nanocrystals were dispersed in n-hexane solvent, and the above Cs 3 Cu 2 Br 5 The nanocrystal solution is drip-coated on the glass sheet, and the n-hexane solvent is naturally evaporated to dryness, and then the nanocrystal solution is drip-coated on the glass sheet, and then evaporated to dryness naturally. The above steps are repeated several times to form a non-self-absorbed Cs 3 Cu 2 Br 5 Nanocrystalline thin-film scintillators for X-ray imaging.

[0074] The method specifically includes the following steps:

[0075] (1) the Cs 3 Cu 2 Br 5 Nanocrystals are dispersed in n-hexane solvent, the dispersion concentration is 40-50mg / mL;

[0076] (2) The above Cs 3 Cu 2 Br 5 The nanocrystal solution is drip-coated on the glass sheet, and the n-hexane solvent is naturally evaporated to...

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Abstract

The invention belongs to the technical field of application of all-inorganic metal halide nanocrystals, and discloses application of a non-self-absorption nanocrystal as a scintillator and a preparation method of the non-self-absorption nanocrystal. The chemical general formula of the nanocrystal is Cs3Cu2X5, and X is selected from Cl, Br and I. The preparation method of the scintillator comprisesthe following steps: coating a glass sheet with an organic solution of Cs3Cu2X5 nanocrystalline, and naturally volatilizing an organic solvent in air to form a Cs3Cu2X5 nanocrystalline film which canbe used as the scintillator. The Cs3Cu2X5 nanocrystalline thin film is prepared to serve as a scintillator to be applied to X-ray imaging, the efficient scintillation performance is shown, and meanwhile the Cs3Cu2I5 nanocrystalline scintillator is applied to X-ray imaging, and the very high resolution is shown as high as 0.32 mm. The preparation method is simple in preparation process, easy to implement and low in cost, and has important application value and important prospect in medical diagnosis, national defense industry and manufacturing industry. And meanwhile, the defects of the traditional lead-containing halogen perovskite nanocrystalline can be overcome.

Description

technical field [0001] The invention belongs to the technical field of application of all-inorganic metal halide nanomaterials, and more specifically relates to a Cs-free 3 Cu 2 x 5 Application of (X=Cl, Br, I) nanocrystals as scintillators, Cs 3 Cu 2 x 5 (X=Cl, Br, I) Preparation of nanocrystalline thin film scintillator and its application in the field of X-ray imaging. Background technique [0002] Scintillators are a class of materials that can emit visible light after absorbing high-energy particles or rays, and play a very important role in the field of radiation detection. Under the irradiation of high-energy rays, the visible light emitted by the scintillator is converted into electrical signals through photomultiplier tubes, photodiodes or avalanche photodiodes, so as to detect or image high-energy particles or rays. In medicine, scintillators are the core components of nuclear medicine imaging equipment, through which the lesions of various organs of the huma...

Claims

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Application Information

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IPC IPC(8): C01G3/00B82Y40/00B82Y20/00C03C17/22G01T1/202
CPCB82Y20/00B82Y40/00C01G3/006C01P2002/84C01P2006/60C03C17/22C03C2217/284C03C2217/286C03C2218/11G01T1/2023
Inventor 张建兵连霖源蓝新正张道礼唐江
Owner HUAZHONG UNIV OF SCI & TECH
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