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Preparation method of transparent perovskite/polymer scintillation screen applied to X-ray imaging

A transparent polymer, perovskite technology, applied in X-ray/infrared processes, chemical instruments and methods, conversion screens, etc., can solve the problem of difficulty in realizing large-area flexible scintillation screens, poor long-term stability of scintillation screens, and difficulty in realizing flexible screens. and other problems, to achieve high environmental and work stability, improve photon yield, and have the effects of process amplification and repeatability

Pending Publication Date: 2022-01-07
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, cesium iodide is an ionic crystal, which is easy to deliquescence and has high requirements for packaging
In addition, crystal growth requires high temperature conditions, and it is difficult to realize flexible screens.
At present, it is difficult to realize the production of large-area flexible scintillation screens and the long-term stability of scintillation screens is poor

Method used

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  • Preparation method of transparent perovskite/polymer scintillation screen applied to X-ray imaging
  • Preparation method of transparent perovskite/polymer scintillation screen applied to X-ray imaging
  • Preparation method of transparent perovskite/polymer scintillation screen applied to X-ray imaging

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preparation example Construction

[0022] A method for preparing a transparent perovskite / polymer scintillation screen applied to X-ray imaging, comprising the following steps:

[0023] 1) Immerse the transparent polymer substrate in 0.01-1mol / L perovskite DMF solution, and put it into the reaction kettle;

[0024] Wherein, the transparent polymer substrate is polyethylene terephthalate (PET), polyimide (PI) or polystyrene (PS), polycarbonate (PC). The thickness of the transparent polymer substrate is 0.001~10mm, and the area of ​​the polymer substrate is 1~400cm 2 .

[0025] 2) Transfer the reaction kettle to a constant temperature box and react at 60-200°C for 10-6000min;

[0026] 3) Take out the transparent polymer substrate and soak it in isopropanol at 80°C for 1-60 minutes;

[0027] 4) Take out the transparent polymer substrate and dry it in an incubator at 80°C for 30-300 minutes;

[0028] 5) A thick scintillation screen is made by stacking multiple transparent polymer substrates by hot pressing or b...

Embodiment 1

[0031] 1) Make a thickness of 0.1mm and an area of ​​4cm 2 The transparent PET substrate is immersed in 0.3mol / L MAPbBr 3 DMF solution, packed in 50ML reactor;

[0032] 2) Transfer the reactor to a thermostat at 180°C for 120 minutes;

[0033] 3) Take out the transparent polymer substrate and soak it in isopropanol at 80°C for 15 minutes;

[0034] 4) Take out the transparent polymer substrate and dry it in an incubator at 80° C. for 120 minutes.

[0035] 5) Bond two PET substrates to form a transparent perovskite / polymer scintillation screen with a thickness of 0.2mm.

Embodiment 2

[0037] 1) Make a thickness of 0.1mm and an area of ​​100cm 2 The transparent PET substrate is immersed in 0.3mol / L (PEA) 2 PB 4 DMF solution, put into 200ML reactor;

[0038] 2) Transfer the reactor to a thermostat at 180°C for 240 minutes;

[0039] 3) Take out the transparent polymer substrate and soak it in isopropanol at 80°C for 15 minutes;

[0040] 4) Take out the transparent polymer substrate and dry it in an incubator at 80° C. for 120 minutes.

[0041] 5) Bond three PET substrates to form a transparent perovskite / polymer scintillation screen with a thickness of 0.3 mm.

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Abstract

The invention discloses a preparation method of a transparent perovskite / polymer scintillation screen applied to X-ray imaging. The method comprises the following steps: immersing a transparent polymer substrate into a DMF solution of perovskite, and then putting into a reaction kettle; reacting the reaction kettle at 60-200 DEG C for 10-6000 minutes, soaking the transparent polymer substrates in isopropanol, drying, and finally stacking a plurality of transparent polymer substrates in a hot pressing or bonding manner to prepare the thick scintillation screen. According to the invention, the flexible large-area scintillation screen prepared by the invention has the advantages of high photon yield, high light transmittance, high imaging resolution and adjustable light emitting wavelength; and the developed dip dyeing process is high in repeatability and reliability, is suitable for preparing a large-area uniform perovskite scintillation screen, and is expected to be applied to curved surface X-ray imaging to reduce edge imaging distortion.

Description

technical field [0001] The invention belongs to the field of high-energy ray detection, in particular to a method for preparing a transparent perovskite / polymer scintillation screen applied to X-ray imaging. Background technique [0002] Digital X-ray imaging technology plays a huge role in fields such as medicine, security inspection, industrial non-destructive testing, and industrial flaw detection. On the one hand, X-ray imaging is based on the high penetration of X-rays, and on the other hand, the measured substance has a difference in density and thickness. Compared with direct detection, the scintillator-based indirect detection method can utilize mature CCD imaging devices, so the performance of the scintillation screen is a key factor in determining the imaging quality. The traditional X-ray scintillation screen is to sequentially deposit a reflective layer, a cesium iodide scintillator layer and a barrier layer on a glass substrate, such as Chinese patent CN1037441...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B38/08B32B38/16B32B38/00B32B37/06B32B37/10B29C65/02G21K4/00B29C65/48C08J7/06C08L67/02
CPCB32B38/08B32B38/164B32B38/0036B32B37/06B32B37/10C08J7/06B29C65/02B29C65/48B29C66/45G21K4/00B32B2250/24B32B2307/412C08J2367/02
Inventor 杨智郭威汪敏强
Owner XI AN JIAOTONG UNIV
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