ArticleAdvanced science (Weinheim, Baden-Wurttemberg, Germany)2026
Intermolecular Aggregation-Induced Delayed Fluorescence Scintillators for Ultrahigh-Resolution X-Ray Imaging.
Article in Advanced science (Weinheim, Baden-Wurttemberg, Germany), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Organic X-ray scintillators (OXSTs) with excellent optoelectronic properties and facile processability are highly attractive for next-generation radiation detection and medical imaging. However, achieving efficient solid-state emission with high exciton utilization efficiency remains a formidable challenge because aggregation-caused quenching fundamentally suppresses radiative processes. Here, we introduce an intermolecular aggregation-induced delayed fluorescence (AIDF) strategy that combines aggregation-induced emission and thermally activated DF features. The tailored emitter exhibits efficient AIDF with sub-microsecond delayed lifetimes via through-space charge transfer, enabling effective harvesting of singlet and triplet excitons. When blended into a polysulfone host, the composite films deliver bright and stable radioluminescence across a wide concentration range, showing exceptional resistance to concentration quenching under X-ray excitation. Benefiting from large Stokes shifts, rapid reverse intersystem crossing, and efficient radiative emission, the resulting scintillator achieves an ultralow detection limit of 0.255 µGy s
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