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Resurfaced CsPbBr3 Nanocrystals Enable Free Radical Thermal Polymerization of Efficient Ultrafast Polyvinyl Styrene Nanocomposite Scintillators
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Resurfaced CsPbBr3 Nanocrystals Enable Free Radical Thermal Polymerization of Efficient Ultrafast Polyvinyl Styrene Nanocomposite Scintillators
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Resurfaced CsPbBr3 Nanocrystals Enable Free Radical Thermal Polymerization of Efficient Ultrafast Polyvinyl Styrene Nanocomposite Scintillators
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Paper
Resurfaced CsPbBr3 Nanocrystals Enable Free Radical Thermal Polymerization of Efficient Ultrafast Polyvinyl Styrene Nanocomposite Scintillators
2024
Overview
Lead halide perovskite nanocrystals (LHP-NCs) embedded in a plastic matrix are highly promising for a variety of photonic technologies and are quickly gaining attention as ultrafast, radiation-resistant nanoscintillators for radiation detection. However, advancements in LHP-NC-based photonics are hindered by their well-known thermal instability, which makes them unsuitable for industrial thermally activated mass polymerization processes - crucial for creating polystyrene-based scintillating nanocomposites. In this study, we address this challenge by presenting the first thermal nanocomposite scintillators made from CsPbBr3 NCs passivated with fluorinated ligands that remain attached to the particles surfaces even at high temperatures, enabling their integration into mass-cured polyvinyl toluene without compromising optical properties. Consequently, these nanocomposites demonstrate scintillation light yields reaching 10,400 photons/MeV, sub-nanosecond scintillation kinetics, and remarkable radiation resilience, able to withstand gamma radiation doses of up to 1 MGy. This performance not only meets but also exceeds the scintillation of plastic scintillators, despite the radiation-induced damage to the host matrix.
Publisher
Cornell University Library, arXiv.org
Subject
/ Toluene
