Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.121
Publication date: 16th December 2024
Lead halide perovskites nanocrystals (PNCs), prized for their solution processability, strong light-matter interaction, tunable and high radioluminescence within visible range, are emerging high-atomic number scintillating materials for next generation scintillator/photodetectors for ionizing radiation detection. However, the challenge of embedding NCs into optical-grade nanocomposites without degrading their optical properties continues to hinder their widespread adoption. Moreover, fundamental aspects of the scintillation mechanisms remain insufficiently understood, leaving the scientific community without well-defined fabrication protocols or rational design guidelines for fully harnessing their potential. Recently, innovative strategies for embedding PNCs in impermeable host matrices have been developed [1], effectively preserving their luminescence properties in harsh environments while preventing Pb dispersion, thereby enabling their safe use in biological applications. Furthermore, studies have identified key parameters in the design of scintillation detectors at the isolated NC level, providing critical insights for optimizing their performance [2]. We investigate the embedding of PNCs within mesoporous silica particles, enabling improved stability and controlled dispersion in non-scintillating solvents. Our findings suggest that localized PNC concentration can trigger cascading scintillation, where secondary excitation enhances emission efficiency. Furthermore, this approach mitigates lead dispersion while maintaining strong radioluminescence, addressing key concerns in high-loading nanocomposite systems. This study advances the understanding of nanoscale scintillation mechanisms and provides insights into designing next-generation PNC-based scintillation detectors.
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