Self-driven X-ray detector based on single crystal heterojunction and preparation method thereof

The invention discloses a self-driven X-ray detector based on a single crystal heterojunction and a preparation method thereof, the X-ray detector takes APbCxD3-x single crystal/APbDyC3-y single crystal as the single crystal heterojunction, a built-in electric field formed by the heterojunction formed by the APbCxD3-x single crystal and the APbDyC3-y single crystal is utilized to obtain a large electron hole injection barrier, and the X-ray detector has a rectification characteristic, is forward-conducting, and has a good self-driving performance. Carrier transport is promoted, and light current is increased; the photoelectric detector has the advantages that the photoelectric detector is in reverse cut-off, ion migration, dark current and the like can be effectively inhibited, charge collection efficiency is improved, photon-generated carriers can be separated and transmitted under the condition that bias voltage is not applied, in other words, the photoelectric detector can perform self-driven X-ray detecti