Hydrogen-bond engineered supramolecular bismuth halides for flexible X-ray imaging without geometric distortion

• • The HBES-PDBiI5 film achieves a hole mobility of 2.16 cm2 V−1 s−1 and a mobility-lifetime product of 9.1 × 10−4 cm2 V−1, surpassing conventional thick-film detectors and rivaling single-crystal performance, which is critical for high-sensitivity X-ray detection. • • The X-ray detector exhibits a record sensitivity of 19,009 μC Gyair−1 cm−2 and an ultralow detection limit of 3.35 nGyair s−1, enabling low-dose imaging and reducing radiation exposure in medical and industrial applications. • • The flexible imager retains 85% of its X-ray response after 1000 bending cycles, demonstrating mechanical durability essential for wearable and conformal electronics. • • The flexible imager achieves 85% edge photocurrent retention compared to 58% for rigid detectors, effectively eliminating vignetting and geometric distortion, which is vital for accurate imaging of curved objects in nondestructive testing.