Publication date: 8th July 2026
The demand for high-speed X-ray imaging is rapidly increasing, which creates an urgent need for scintillators with high light yield and fast response. Halide perovskite nanocrystals (PNCs) have emerged as promising candidates due to their superior optical properties and the simplicity of their solution-based processing. However, the production of thick X-ray films—three orders of magnitude thicker than typical optoelectronic devices—causes significant material waste and a major reduction in light yield. This loss in efficiency is mainly due to strong spectral overlap, which leads to severe self-absorption. Moreover, conventional synthesis methods for PNCs often result in low reaction yields and unpredictable exciton pathways. In response, we have developed a low-temperature polar-solvent synthesis method that achieves a record reaction yield of 162 mg mL-1 and optimized exciton routing for improved energy transfer. Notably, our method increases the Stokes shift and reduces the radioluminescence decay time to 7.19 ns, among the fastest values reported for CsPbBr3 nanostructures. Consequently, we achieve high-speed X-ray imaging at 7,680 frames per second, along with a spatial resolution of 27.6 line-pairs per millimeter. This advancement supports the sustainable commercialization of PNC scintillators for fast, dynamic X-ray imaging.
This work was financially supported by the National Key Research and Development Program of China (2024YFA1210002 (X. M.)), NSFC (U23A20359, 62222405 (X. M.)), Natural Science Foundation of Jiangsu Province (BK20220142 (X. M.)), the Fundamental Research Funds for the Central Universities (30922010713 (X. M.)), the Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX24_0656 (X. D.)). This work was supported by the King Abdullah University of Science and Technology (KAUST) and Hangzhou Tiray Technology Co., Ltd. We also thank the support from Dalian TIME-TECH SPECTRA Co. Ltd for the time-resolved ultrafast PL measurement.
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