High-Quality Cs3Cu2I5@PMMA Scintillator Films Assisted by Multiprocessing for X-ray Imaging

In recent years, novel metal halide scintillators haveshown greatapplication potential due to their tunable emission wavelength, highX-ray absorption, and high luminescence efficiency. However, poorstability and complex device packaging remain key issues for metalhalide scintillators, making it difficult to achieve high-resolutionand flexible X-ray imaging applications. To address the above issues,a multiprocessing strategy was introduced to prepare Cs3Cu2I5@PMMA scintillator films for long-termstable application, mainly undergo different annealing treatmentsto make Cs3Cu2I5 crystals to accuratelynucleate and then grow in-situ in the PMMA matrix. Then, a seriesof characterization results illustrate that the prepared Cs3Cu2I5@PMMA scintillator films have high crystallinity,uniform size, excellent flexibility, high stable photoluminescence(PL) and radioluminescence (RL) performance, and high-resolution X-rayimaging capability. Most importantly, Cs3Cu2I5@PMMA scintillator films can not only provide clearand accurate imaging recognition of objects with different complexstructures but also maintain stable X-ray imaging quality within 60days and can achieve flexible X-ray imaging. Therefore, we have providedan effective strategy for producing high-quality scintillator filmsto meet the multidimensional needs of a new generation of scintillators.