Structural and luminescence properties of Y2O3:Eu3+ core-shell nanoparticles

► Structural and optical properties of the different nanoparticles were compared. ► Investigated how the symmetry of Eu influences the emission spectra. ► We altered the emission spectra of the core-shell nanoparticle by adding a codopant. ► Obtaining information about the chemical and topological environment of Eu ions. ► Examine optical and structural properties of core-shell particles with Au@SiO2 core.