The invention proposes an X-
ray detector with energy resolution, and a detection method of the X-
ray detector. The
detector sequentially comprises a front collection
electrode, an N+ doped layer, an MAPbX3
perovskite monocrystalline active material layer for
photoelectric conversion, a P+ doped layer and a rear collection
electrode from the top to the bottom. The thickness of the MAPbX3 perovskitemonocrystalline active material layer is not less than 5mm. The front collection
electrode is connected with the positive electrode of a detector power supply. The rear collection electrode is connected with the negative electrode of the detector power supply. The detection method comprises the steps: applying different
reverse bias voltages to the detector in one X-
ray exposure operation, and extracting the detection
signal currents of X-ray photons with different energy values based on a corresponding
algorithm according to the detection currents under different bias voltages. The detectorand method can achieve the beneficial effects that (1), the detector and method achieve the X-ray detection with the energy resolution capability and the
image subtraction of X-ray
photon imaging withdifferent energy values; (2), the detector and method just need one X-ray
exposure operation, thereby reducing the dosage of X-ray on a patient; (3), the detector and method do not need an additionalcontrast agent, and reduce the toxic and
side effect on the patient.