Controllable printing perovskite thick film for X-ray flat panel imaging

Halide perovskites exhibit substantial potential for use in X-ray imaging applications. However, significant challenges persist in seamlessly integrating these materials with pixelated array readout circuits and in ensuring sufficient attenuation for direct X-ray detection imaging. In this study, we propose a reliable approach involving the manipulation of crystallization dynamics, rheological engineering, and an inter-grain cross-linking strategy to prepare robust and tunable perovskite-polymer composite (PPC) films on the scale of hundreds of microns. The PPC film was reinforced with multifunctional additives possessing bonding and stress-buffering capabilities, which effectively alleviated residual tensile stress, leading to a significant enhancement of mechanical strength. The obtained perovskite-polymer composite detector exhibits a high sensitivity of 2.51 × 10 4  μC Gy air −1 cm −2 , excellent pixel-level uniformity with a low photo-response non-uniformity (PRNU) value of 1.85 % and a high spatial resolution of 0.57 line pairs per pixel (lp pix −1 ). This approach provides valuable guidance for perovskite-based X-ray imaging.