Optical Spectra of Y₂O₃Single Crystals in VUV

Electronic, structural, and optical properties of host materials for inorganic phosphors

“…Sizeable values of ε 2 are constrained to the region between 6.3 and 15 eV. A second structure at higher energies below 25 eV as in the case of lanthanum compounds is absent both in the dielectric function of C-Y 2 O 3 and Y 2 O 2 S. The dielectric function calculated for C-Y 2 O 3 is in good agreement with that published by Xu et al [45] and the experimental data of Tomiki et al [67]. The calculated electronic contribution to the static dielectric permittivity for C-Y 2 O 3 is ε ∞ = 3.56, similar to that obtained by Xu et al [45].…”

Effects of Tb doping on the photoluminescence of Y2O3:Tb nanophosphors

“…The optical properties of bulk Y 2 O 3 have been investigated previously due to the potential of this material as a host of RE ions for laser applications [11][12][13]. This material is transparent from $0.2 to 8-9 mm [11][12][13] with a band gap of 5.6 eV.…”

“…This material is transparent from $0.2 to 8-9 mm [11][12][13] with a band gap of 5.6 eV. Y 2 O 3 has a body-centered cubic crystallographic structure with the Y 3+ ion being at the center of the cube and the oxygen ions located at the corners.…”

Silica-coated Y2O3:Eu nanoparticles and their luminescence properties

“…It is found that there are two broad bands in the range of 200-300 nm. The one near 214 nm stands for the absorption of the host lattice, which is due to the transition of the electrons from the oxygen 2p state to the yttrium conduction band [22]. The other one near 250 nm is attributed to the excitation from the ground state of the 4f shell to the Eu-O charge transfer state (CTS).…”