Fig. 4: Device structure of the imaging detectors.

a Photograph of the 64×64-pixeled TFT substrate and its microstructure; (b) Edge image processing for MTF calculation; (c) MTF curve of the TiO2-Q-2D FPXI; and (d) Schematic illustration of the X-ray imaging process. The X-ray detector structure from top to bottom is Au, Q-2D perovskite, TiO2 and TFT, respectively