A kind of X-ray detector based on perovskite single crystal particle composite film and its preparation method

Abstract

The invention relates to an X-ray detector based on a perovskite single crystal particle composite film and a preparation method thereof. The X-ray detector includes a hole transport layer, a perovskite single crystal particle composite film, an electron transport layer, an interface modification layer and an electrode, wherein the perovskite single crystal particle composite film is a perovskite single crystal and polyalcohol or The polymer composite film has a film thickness of 30-200 μm, and the perovskite single crystal is methylamine lead bromide salt perovskite single crystal. Its preparation is as follows: prepare methylamine lead bromide salt perovskite single crystal, uniformly disperse in polyols or polymer solution after crushing and sieving, then spin-coat on the hole transport layer or electron transport layer, and prepare after annealing A perovskite single crystal particle composite film is obtained; an electron transport layer or a hole transport layer, an interface modification layer and an electrode are deposited on the surface of the obtained composite film to obtain an X-ray detector based on a perovskite single crystal particle composite film. The preparation is simple, a lower dose rate can be detected, the sensitivity is high, the response is fast, and the charge transport performance is excellent.

Description

technical field

[0001] The invention belongs to the field of X-ray thin film devices, in particular to an X-ray detector based on perovskite single crystal particle composite film and a preparation method thereof. Background technique

[0002] Organic-inorganic hybrid perovskite materials are widely used in the field of optoelectronics (solar cells, light-emitting diodes) due to their unique properties such as high absorption coefficient, large hole and electron mobility, long diffusion length, adjustable band gap, and convenient processing / integration. , photodetectors, etc.) have received extensive attention. Moreover, X-ray detectors based on perovskite materials are also a promising alternative to current X-ray detector technologies (i.e., direct conversion based on amorphous selenium or indirect conversion based on scintillation crystals) and are applied in high-energy X-ray detectors. - Detection of ionizing radiation such as ray or gamma rays. Like the detection of ...

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