Limiting Exciton Diffusion Enhances the Optical Response of CsPbBr ₃ Nanocrystal Films at High Excitation Densities

shell is identified as an effective strategy to reduce inter-NC exciton diffusion while providing improved chemical stability. Together, the experimental results and numerical modeling presented in this work establish predictive tools for the design of nanocomposite materials with optimized ultrafast luminescence properties.