Photoluminescence study of inorganic CsPbBr ₃ perovskite nanocrystals localized in an electrodynamic trap

Subject of study. The study focuses on CsPbBr 3 perovskite nanocrystals (NCs) localized in a quadrupole electrodynamic trap. Aim of study. The aim was to establish the dependence of the photoluminescence spectral characteristics of perovskite NCs on their localization environment, specifically in a colloidal solution and quadrupole electrodynamic trap. Method. Perovskite NCs were delivered to the trap using the “paper spray” electrospraying technique. Spraying from paper cartridges was induced by applying a direct current to the cartridges. Spectroscopy of the localized particles was performed under ultraviolet laser excitation using a monochromator and detector. Main results. The photoluminescence spectra of the perovskite NCs were obtained both in a colloidal solution and when they were localized in a quadrupole electrodynamic trap. A dependence was observed; the photoluminescence spectrum of the localized perovskite NCs was narrower than that of NCs in the colloidal solution. Practical significance. The results obtained in this study serve as a foundation for detailed analyses of the influence of various parameters, such as the particle size, shape, surface states, chemical composition, geometric orientation, and surrounding environment, on the optical properties of nanomaterials.