  Lead halide perovskite nanocrystals (LHP-NCs) embedded in polymeric hosts are
gaining attention as scalable and low-cost scintillation detectors for
technologically relevant applications. Despite rapid progress, little is
currently known about the scintillation properties and stability of LHP-NCs
prepared by the ligand assisted reprecipitation (LARP) method, which allows
mass scalability at room temperature unmatched by any other type of
nanostructure, and the implications of incorporating LHP-NCs into polyacrylate
hosts are still largely debated. Here, we show that LARP-synthesized CsPbBr3
NCs are comparable to particles from hot-injection routes and unravel the dual
effect of polyacrylate incorporation, where the partial degradation of LHP-NCs
luminescence is counterbalanced by the passivation of electron-poor defects by
the host acrylic groups. Experiments on NCs with tailored surface defects show
that the balance between such antithetical effects of polymer embedding is
determined by the surface defect density of the NCs and provide guidelines for
further material optimization.
