Assembly and luminescence properties of lanthanide-polyoxometalates/polyethyleneimine/SiO2 particles with core-shell structure

► SiO2/polyethyleneimine (PEI) shows the chemisorption for Ln-polyoxometalates (LnW10). ► The core-shell LnW10/PEI/SiO2 nanoparticles with different sizes were fabricated. ► The hybrid particles exhibit the excellent luminescence properties. ► The sizes of particles affect the luminescence properties of lanthanide ions.