A kind of X-ray detection panel and its preparation method

Abstract

The embodiment of the invention discloses an X-ray detecting panel and a preparation method thereof, relates to the field of detecting instruments, and provides the X-ray detecting panel with non-thallium-doped scintillator film layer as the scintillator. The injuries of thallium and iodide thereof to human bodies can be avoided, and meanwhile the preparation cost of the X-ray detecting panel is greatly reduced. The X-ray detecting panel comprises a lining substrate, a switch array arranged on the lining substrate, a photoelectric detector array arranged on the switch array, a cover plate, a scintillator film layer arranged on the cover plate, and a colloid quantum dot film layer arranged between the scintillator film layer and the photoelectric detector array, wherein the scintillator film layer is used for converting X-rays into near ultraviolet light, the colloid quantum dot film layer is used for converting near ultraviolet light converted by the scintillator film layer into visible light to be output, and the photoelectric detector array is used for converting the visible light converted by a wavelength converting unit into electric signals to be output.

Description

technical field [0001] The invention relates to the field of detection instruments, in particular to the field of X-ray detection panels. Background technique [0002] Because of the characteristics of high photon energy and strong penetrating power, X-rays are widely used in medical perspective inspection, industrial flaw detection and security inspection in subways, airports, stations and other places. The X-ray detection panels currently on the market use 500-600 micron thick CsI:TlI (thallium iodide-doped cesium iodide) columnar crystal film as the scintillator material to convert high-energy X-rays into visible light, and then It is detected by the amorphous silicon photodetector array and converted into voltage and current signals, and finally collected by the Array backplane and read out by peripheral circuits, and output to the display to form an image. The scintillator used in this technology is made of doped cesium iodide, but the thallium and its compound thalliu...

AI Technical Summary

Problems solved by technology

The scintillator used in this technology is made of doped cesium iodide, but the thallium and its compound thallium iodide contained in the doped cesium iodide are highly toxic substances, which will cause great harm to the human body, so the preparation This type of panel requires a huge investment in safety

In addition, if pure undoped cesium iodide crystals are used, the purpose of converting X-rays into visible light for detection cannot be achieved.

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