A Lead‐Free Copper(I) Iodide Hybrid Scintillator for High‐Resolution X‐Ray Imaging
Hengyi Shu, Jun'an Lai, Yayun Pu, Mengyue Wu, Jianping Hao, Tingfu Pang, Wenxia Zhang, Xiaosheng TangABSTRACT
Lead‐free scintillators are highly desirable for flexible X‐ray imaging screens, yet they suffer from high cost, low resolution, and poor environmental compatibility. Herein, a novel organic–inorganic hybrid copper(I) iodide scintillator (C 18 H 15 P) 2 CuIC 5 H 6 N 2 is synthesized via a facile cooling crystallization method. The compound exhibits intense blue‐violet emission with a photon yield of 16 028 photons MeV − 1 and a low detection limit of 85.588 nGy s − 1 . A flexible scintillator film is further fabricated by the vacuum suction filtration method, delivering a record spatial resolution of 15.4 lp mm − 1 among copper‐based halide scintillators. This work provides a new paradigm for developing high‐performance lead‐free X‐ray scintillators toward medical imaging and industrial inspection.