Publication date: 17th July 2025
Lead-halide perovskite nanocrystals are emerging as valuable platform for next-generation scintillators, capable of combining high light yield with sub-nanosecond timing while giving access to collective quantum-optical regimes. This presentation will outline a coherent research trajectory that begins with rational materials engineering and culminates in the observation of cooperative emission under ionising radiation. Recent work shows that integrating CsPbBr₃ nanocrystals into appropriately chosen high-Z or mesoporous hosts can suppress defect-mediated degradation, enhance charge-collection efficiency and preserve ultrafast radiative kinetics, thus overcoming the intrinsic limitations of colloidal emitters. Building on this foundation, weak quantum confinement gives rise to a giant oscillator strength that reconciles brightness and speed, historically conflicting figures of merit in radiation detection, while ordered superlattices enable scintillation superfluorescence, in which incoherent ionisation cascades converge into deterministic, picosecond bursts of light. Together, these advances demonstrate how interfacial chemistry, mesoscale ordering and many-body exciton dynamics can be orchestrated to convert stochastic electron tracks into coherent optical signals free from reabsorption and non-radiative losses. The resulting nanoscintillators deliver promising light yields with temporal resolutions approaching a few tens of picoseconds, setting the stage for time-of-flight imaging, high-energy physics instrumentation and precision dosimetry. The talk will distil the unifying principles that link materials design to emergent photophysics and discuss the remaining challenges for scalable device integration.
This work was funded by Horizon Europe EIC Pathfinder program through project 101098649 – UNICORN, by the PRIN program of the Italian Ministry of University and Research (IRONSIDE project), by the European Union—NextGenerationEU through the Italian Ministry of University and Research under PNRR—M4C2-I1.3 Project PE_00000019 “HEAL ITALIA”, by European Union’s Horizon 2020 Research and Innovation programme under Grant Agreement No 101004761 (AIDAINNOVA). This research is funded and supervised by the Italian Space Agency (Agenzia Spaziale Italiana, ASI) in the framework of the Research Day “Giornate della Ricerca Spaziale” initiative through the contract ASI N. 2023-4-U.0t
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