The optical properties of Eu3+ doped BaAl2O4: A computational and spectroscopic study

Atomistic Simulation of Intrinsic Defects and Trivalent and Tetravalent Ion Doping in Hydroxyapatite

“…If it occupies a site with inversion symmetry, only the magnetic-dipole transition D 0 -7 F 1 can be observed; but if there is no inversion symmetry at the site of the Eu 3+ ion, the electric-dipole transitions 5 D 0 -7 F 2 can be observed. Also, the transition is sensitive to the coordination environment [35].…”

The Rare-Earth Elements Doping of BaGdF5 Nanophosphors for X-ray Photodynamic Therapy

“…The BaGdF 5 :Eu XEOL spectrum shows spectral shape a typical for Eu 3+ ion doped into BaGdF 5 matrix. The origin of Eu 3+ emission spectrum in the optical range is forbidden electric-dipole 4f → 4f ( 5 D 0 → 7 F J=0,1,2,3,4 ) transitions which strongly depend on the symmetry of the site which Eu 3+ occupies [42]. While magnetic-dipole allowed 5 D 0 → 7 F 1 (λ = 592 nm) and 5 D 0 → 7 F 4 (λ = 698 nm) transitions are relatively insensitive to the environment, low intensity of electric-dipole transition 5 D 0 → 7 F 2 (λ = 618 nm) as well as the absence 5 D 0 → 7 F 0 transition could be a signature of high symmetry at the Eu 3+ site.…”

Influence of co-dopant in the europium reduction in SrAl2O4host

“…In stage (i), the substitution of Eu 3+ at the Sr 2+ site, Eu Sr (a single subscript * indicates a single positive charge; Kroger & Vink, 1954), is an aliovalent substitution requiring that some charge-compensating defects must be formed to keep the neutrality of charges throughout the sample. Previous computer modelling results (Rezende et al, 2012) revealed that the main charge-compensating defect is interstitial oxygen (using Kroger-Vink notation, O 00 i ) located near the Eu 3+ ions. The reaction corresponding to the defect formed in this stage is given by equation 1, where Kroger-Vink notation is used to represent the defects,…”