Ultrafast Superradiant Scintillation from Isolated Weakly Confined Perovskite Nanocrystals

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 21, 2025

Efficiency and emission rate are two traditionally conflicting parameters in radiation detection, achieving their simultaneous maximization can significantly advance ultrafast time-of-flight (ToF) technologies. In this study, it is demonstrated that goal attainable by harnessing the giant oscillator strength (GOS) inherent to weakly confined perovskite nanocrystals, which enables superradiant scintillation under mildly cryogenic conditions align seamlessly with ToF It shown radiative acceleration due GOS encompasses both single multiple exciton dynamics arising from ionizing interactions, further enhanced suppressed non-radiative losses Auger recombination at 80 K. The outcome 420 ps lifetime light yield of ≈10 000 photons/MeV for diluted NC solutions, all without losses. Temperature-dependent light-guiding experiments on test-bed nanocomposite scintillators finally indicate light-transport capability remains unaffected accumulation band-edge GOS. These findings suggest a promising pathway toward developing nanotechnological optimized output timing performance.

Language: Английский

Surface Modified CsPbBr₃ Nanocrystals Enable Free Radical Thermal Polymerization of Efficient Ultrafast Polystyrenic Nanocomposite Scintillators

ACS Energy Letters, Journal Year: 2024, Volume and Issue: unknown, P. 12 - 21

Published: Dec. 6, 2024

Language: Английский