Halide perovskite single crystal, preparation method and application of halogenated perovskite single crystal in preparation of X-ray detector

Abstract

The invention discloses a halide perovskite single crystal, a preparation method and application of the single crystal in preparation of an X-ray detector, and belongs to the technical field of X-raydetectors. The invention develops a method for controlling the growth of halide perovskite single crystals through solvent evaporation, the growth rate of the crystals is constant mainly by regulatingand controlling the growth temperature, the opening area of a solution and other factors, and the perovskite single crystals with lower crystal defect state density and higher carrier mobility-carrier lifetime deposition are grown. Polyoxyethylene is used for passivating surface defects of the perovskite single crystal, so that the crystal surface defects and surface leakage current are remarkably reduced, and the crystal has higher resistivity and lower noise current signals. The sensitivity of the prepared X-ray detector under 120 keV hard rays reaches 1274 [mu] C.Gyair.cm <2>, the lowest detection amount is as low as 0.56 [mu] Gyair.s <-1>, the requirements of medical imaging application are met, and the X-ray detector can be applied to metal material component analysis and flaw detection.

Description

technical field [0001] The invention belongs to the technical field of X-ray detection, and in particular relates to a halide perovskite single crystal, a method for preparing it by controlling solvent volatilization and growth, and an application of the single crystal in preparing an X-ray detector. Background technique [0002] Because X-rays have strong penetrating ability and can detect information inside objects without damage, they are widely used in medical imaging, safety inspection, transportation container inspection, material quality inspection and scientific research. For X-ray detectors, high sensitivity at low X-ray doses can be widely used in various fields. Sensitivity and minimum detection dose are one of its most important parameters. [0003] In recent years, perovskite materials have been regarded as a new generation X due to their excellent performance in the field of radiation detection due to their low defect state density, large carrier mobility, carr...

AI Technical Summary

Problems solved by technology

However, there are few research reports in the field of X-ray detection, and some exploration is needed to improve the performance of X-ray detectors by using defect state passivation.

Perovskite single crystal devices are developing rapidly in the field of X-ray detection, but there is still a lack of practical application development of perovskite X-ray detectors

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