High light yield perovskite scintillators

Abstract

Perovskite scintillators have garnered significant research interest due to their exceptional photoluminescence properties, tunable bandgaps, and high light yields. Recent advancements have demonstrated that perovskite nanocrystals can achieve photoluminescence quantum yields (PLQY) of up to 200% through the quantum-cutting process, making them promising candidates for next-generation scintillation applications. This thesis explores the synthesis, characterization, and scintillation performance of two distinct perovskite materials: Yb-doped CsPbCl_3 and CsPbBr_3 nanocrystals. The study focuses on optimizing their synthesis methodologies, evaluating their optical properties, and investigating their response to ultraviolet (UV) and X-ray excitation. The emission of visible-range photons for CsPbBr_3 and NIR-range photons for Y b − doped CsPbCl_3 perovskite materials makes them highly suitable for applications such as X-ray imaging, medical diagnostics, and security screening. Through a comprehensive analysis of their fluorescence and scintillation behaviour, this work aims to assess their potential as efficient X-ray scintillators. The findings contribute to the ongoing development of perovskite-based scintillators and offer insights into their viability for practical radiation detection applications.