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Ds as outlined by the four F9/2 six HJ (J = 15/2, 13/2, 11/2) transitions of Dy3+ ions substantially enhanced. Consequently, the estimated quantum yield for Dy3+ -doped nano-glass-ceramic is close to 15.two , when for precursor glass it equaled 4.1 . Hence, the quantum yield for nano-glass-ceramic is almost 4-fold higher than for glass. Indeed, for Dy3+ -doped sol-gel components described within this perform, the sum on the integrated intensities of individual blue (4 F9/2 six H15/2 ), yellow (4 F9/2 6 H13/2 ), and red (4 F9/2 six H11/2 ) emissions is no less than 4.5-fold larger for SiO2 -LaF3 :Dy3+ nano-glass-ceramics compared with silicate xerogels ahead of controlled heat-treatment. Nonetheless, it should be noted that this correlation is observed only for samples with low concentrations of Dy3+ ions in sol-gel hosts (with La3+ :Dy3+ molar ratios equaled 0.988:0.012 and 0.97:0.03) when concentration quenching for glass-ceramics is inhibited. Therefore, we think that for those of fabricated nano-glass-ceramics, the quantum yield might be greater than for xerogels resulting from the preferable location of Dy3+ ions inside LaF3 fluoride nanocrystals and successful shortening of Dy3+ -Dy3+ inter-ionic distances.TP-040 Protocol These critical elements, in accordance with the evaluation of luminescence quantum yields, might be examined in the future. 4. Conclusions This paper presents the optical characterization of Dy3+ -doped silicate xerogels and nano-glass-ceramics containing LaF3 phase, based on the structural modifications and variable La3+ :Dy3+ molar ratios in the samples’ composition. The thermal degradation of La(TFA)3 and its transformation into the fluoride phase was verified by TG/DSC analysis, and XRD measurements confirmed the crystallization of LaF3 in the nanoscale. The luminescence characterization of ready sol-gel samples involved the registration of excitation and emission spectra, in addition to the decay evaluation from the 4 F9/2 excited amount of Dy3+ .Pracinostat Epigenetics For amorphous xerogels, the concentration quenching occurs from the sample together with the lowest proposed La3+ :Dy3+ molar ratio (0.PMID:23075432 70:0.30, XG6), when the Dy3+ -Dy3+ distances would be the shortest in the series. The considerable differences in (4 F9/2 ):Dy3+ lifetimes, the decrease in calculated Y/B-ratio, as well because the benefits from XRD analysis suggest the partial migration of Dy3+ from amorphous xerogel host into crystallized LaF3 nanophase throughout heat-treatment. Indeed, it was identified that luminescence lifetimes are strongly dependent on Dy3+ -Dy3+ inter-ionic distances determined by the content material of optically active Dy3+ ions along with the nature of ready sol-gel supplies (correlated with the vibrational energies in the immediate vicinity of optically active dopant). The embedding of Dy3+ inside LaF3 phase of ready glass-ceramics resulted in continuous shortening of the inter-ionic distances, hence, the progressive quenching of the luminescence is observable even from the lowestNanomaterials 2022, 12,18 ofcontent of Dy3+ (La3+ :Dy3+ = 0.988:0.012, GC1). Simultaneously, the incorporation of Dy3+ into fluoride nanocrystals with low phonon power resulted in substantial elongation of your (four F9/2 ) lifetimes compared with xerogels. The obtained benefits recommend that the fabricated Dy3+ -doped materials could be predisposed for application as visible light emitters, like color screens or three-dimensional displays.Author Contributions: Conceptualization, N.P.; methodology, N.P.; software program, N.P.; validation, N.P., formal evaluation, N.