Enhanced luminescence of CaF2:Er3+/Nd3+ nanoparticles coated by fluorinated β-diketone

In this study, several CaF2 nanoparticles doped with individual ions Nd3+ and Er3+ were synthesized with ligands pentafluorobenzoyl trifluoroacetone (PBTA) and 2-naphthoyltrifluoroacetone (NTA), which served as modifiers. Influence of the modifiers on the luminescence properties of the nanoparticles was investigated. The as-prepared nanoparticles had a similar size and dispersion with an irregular spherical shape, which reduced the influence of particle size on the luminescence of the nanoparticles. The luminescence spectra of these nanoparticles showed the characteristic luminescence of the central lanthanide ions under excitation of the maximum excitation wavelength. Compared with nanoparticles modified by the NTA ligand, nanoparticles modified by the PBTA ligand possessed stronger luminescence intensity for the doping Nd3+ or Er3+ ions.

Automated summary

This study synthesized CaF2 nanoparticles doped with Nd3+ and Er3+ ions using ligands PBTA and NTA, and investigated the influence of these modifiers on the luminescence properties of the nanoparticles. The results showed that nanoparticles modified by PBTA ligand exhibited stronger luminescence intensity when doped with Nd3+ or Er3+ ions.