Structural, optical and non-linear investigation of Eu3+: Al(NO3)3-SiO2 sol-gel glass

Abstract

Optical absorption and fluorescence spectra of Eu 3+ ions in Al(NO 3) 3-SiO 2 sol-gel glass have been investigated using the Judd-Ofelt theory. JO intensity parameters (Ω Ω λ λ) and subsequent radiative properties for 5 D 0 → → 7 F 1,2,4,6 transitions are determined. The lifetime (τ τ r) of 5 D 0 state is computed and along with JO parameters are compared with their corresponding values in other glasses prepared by conventional technique. A structural analysis, using IR and XRD spectra and non-linear parametrization of the silica gel glass is carried out. The study reveals the glass to be a very good third order non-linear amorphous optical material.

Crystal structure re‐determination, spectroscopy, and photoluminescence of π‐YBO3:Eu3+

“…The reflection spectrum of π ‐YBO 3 :Eu 3+ (8 %) (Figure 9) demonstrates a high reflectance in the visible range of the spectrum, which indicates a good sample quality with low defect density. The typical Eu 3+ absorption peak at approximately 395 nm can be observed, which belongs to the 7 F 0 → 5 L 6 transition [45,46] . The considerable lower reflectance in the range between 200 and 350 nm is due to the ligand‐to‐metal‐charge transfer [47] .…”

“…5 L 6 transition. [45,46] The considerable lower reflectance in the range between 200 and 350 nm is due to the ligand-to-metal-charge transfer. [47] The observation is consistent with the emission spectra, where the signal intensity rises slightly before 250 nm (Figure 10).…”

Synthesis and Characterization of ZnS nanoparticle doped Eu 3+ ions prepared by sol-gel method in silica glass matrix

“…Eu 3+ ions are used as the source of commercial red luminous phosphor and also doped in silica glass. The ground state of the Eu 3+ ion is J = 0, which places a special restriction on induced electric-dipole (ED) transitions that originate from the ground state [22]. Additionally, various symmetry sites result in quite different luminescent intensities for the Eu 3+ ion [23].…”

“…Additionally, various symmetry sites result in quite different luminescent intensities for the Eu 3+ ion [23]. The on-going luminescence studies of Eu 3+ ions on various host, for instance Al: Eu 3+ [21,22], CdS: Eu 3+ [23], ZrO2: Eu 3+ [24], LaAlGe2O7: Eu 3+ [25], Sn02: Eu 3+ [26], ZnO: Eu 3+ [27], TiO2: Eu 3+ [28] enhancing knowledge on Eu 3+ ions for photonic applications. However, there have been few works on Eu 3+ ions doped with ZnS nanoparticles in silica glass [29][30][31][32][33][34][35].…”