Ultrahigh‐Loading, Flexible Scintillator Films for High‐Resolution X‐Ray Imaging

作者：Jianwei Gong, Tingting Wu, Zhijian Yang, Xiaoling Chen, Xiaoling Chen, Qinxia Wu, Tianci Jiang, Xinqi Xu, Zhenzhen Zhang, Qiushui Chen, Xiaofeng Chen, Xiaofeng Chen, Huanghao Yang · 发表于：Advanced Optical Materials · 年份：2025 · DOI：10.1002/adom.202502792 · 被引用次数：3 · 研究领域：Medical Imaging Techniques and Applications、Advanced X-ray and CT Imaging、Radiation Detection and Scintillator Technologies

Abstract Achieving high loading, uniformly dispersed scintillators in polymer matrices remains challenging for flexible X‐ray detectors. Herein, a large‐area NaLuF 4 :Tb@WPU scintillator film (48 × 20 cm 2 ) is reported that synergistically integrates solution‐processed NaLuF 4 :Tb scintillators with waterborne polyurethane (WPU), enabling a record‐high 90.4 wt% loading with uniform dispersion. Optimized interfacial compatibility ensures outstanding operational durability with 99.5% radioluminescence intensity retention and <0.5% permanent bending deformation after 2000 bending cycles. The X‐ray scintillator film demonstrates a low detection limit of 20.9 nGy air s −1 alongside environmental, thermal, and radiation stability. Crucially, it highlights high‐resolution thermally‐stimulated luminescence X‐ray imaging (29.0 lp mm −1 ) with minimal geometric distortion (<1.1%) on curved surfaces, overcoming parallax artifacts in rigid detection. This work establishes a novel flexible platform unifying high sensitivity and spatial resolution for medical/industrial X‐ray imaging.