Efficient and Reabsorption-Free Radioluminescence in CsCuI Nanocrystals with Self-Trapped Excitons.

Abstract in brief

• The study explores CsCuI nanocrystals as highly efficient, reabsorption-free scintillators that produce strong radioluminescence under X-ray irradiation, offering a promising alternative to lead-based materials.
• These nanocrystals have a high photoluminescence quantum yield of 73.7%, emit at 445 nm matching silicon photomultiplier response, and demonstrate a high light yield of 79,279 photons per MeV, making them suitable for medical imaging, security, and scientific applications.
• Their stability, solution processability, and ability to form large-area flexible films highlight their potential for low-cost, high-resolution X-ray imaging devices without the issue of self-absorption seen in other perovskite-based scintillators.