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However, its performance is limited by notably prolonged decay times under high\u2010energy X\u2010ray excitation due to inefficient radiative recombination of sparsely distributed bulk excitons. Furthermore, the difficulty in growing and processing high\u2010quality, large\u2010area single crystals hinders the development of scalable scintillation screens. Here, we report a general fabrication strategy for large\u2010area uniform scintillation screens that synergistically enhances the decay time and imaging resolution under X\u2010ray excitation by suppressing bulk exciton diffusion in PEA\n                    <jats:sub>2<\/jats:sub>\n                    PbBr\n                    <jats:sub>4<\/jats:sub>\n                    . By leveraging the spatial confinement of nano\u2010porous templates, we reduce the dimensionality of PEA\n                    <jats:sub>2<\/jats:sub>\n                    PbBr\n                    <jats:sub>4<\/jats:sub>\n                    from bulk single crystals to uniform 1D nanowires, leading to spatial localization of bulk excitons. This localization significantly shortens the radioluminescence decay time from 11.85 to 1.87\u00a0ns. Meanwhile, the regularly aligned periodic optical waveguide structure enables directional propagation of scintillation photons along the nanowires, yielding high spatial resolution imaging (57.1 lp\/mm at MTF = 0.2). This work provides a viable approach for advancing the application of organic\u2010inorganic hybrid scintillators in ultrafast radiation imaging.\n                  <\/jats:p>","DOI":"10.1002\/adma.202521327","type":"journal-article","created":{"date-parts":[[2026,2,4]],"date-time":"2026-02-04T09:24:47Z","timestamp":1770197087000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Exciton Diffusion\u2010Suppressed Scintillator for Ultrafast and High\u2010Resolution Radiography"],"prefix":"10.1002","volume":"38","author":[{"given":"Xiaoyu","family":"Song","sequence":"first","affiliation":[{"name":"School of Materials Sun Yat\u2010sen University  Shenzhen China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Danwen","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Materials Sun Yat\u2010sen University  Shenzhen 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