Enhancement of luminescence in white emitting strontium fluoride core @ calcium fluoride shell nanoparticles
作者： Nandini Kumam , Ningthoujam Premananda Singh , Laishram Priyobarta Singh , Sri Krishna Srivastava
DOI: 10.1186/S11671-015-1053-6
关键词:
摘要: Synthesis of lanthanide-doped fluoride SrF2:3Dy and SrF2:3Dy@CaF2 nanoparticles with different ratios core to shell (1:0.5, 1:1 1:2) has been carried out by employing ethylene glycol route. X-ray diffraction (XRD) patterns reveal that the structure prepared was cubical shape, which is also evident in TEM images. The size for (SrF2:3Dy) found increase when covered (CaF2). It from Fourier transform infrared spectroscopy (FTIR) successfully controls growth acts as a shape modifier regulating rate. In photoluminescence investigation, emission spectra be highly enhanced CaF2 due decrease cross relaxation amongst Dy(3+)-Dy(3+) ions. Such type enhancement luminescence homonanostructure (core@shell) not studied so far, best authors' knowledge. This luminescent material exhibits prominently white light emitting properties shown Commission Internationale d'Eclairage (CIE) chromaticity diagram. calculated correlate colour temperature (CCT) values SrF2:3Dy, (1:0.05), (1:1) (1:2) are 5475, 5476, 5384 5525 K, respectively, lie cold region. Graphical abstract White SrF2:3Dy@CaF2(core@shell).
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