Spectroscopic study of the Eu3+ local symmetry in EuF3 crystal

Nanomaterials Based on Collaboration with Multiple Partners: Zn3Nb2O8 Doped with Eu3+ and/or Amino Substituted Porphyrin Incorporated in Silica Matrices for the Discoloration of Methyl Red

“…The photoluminescence spectrum (PL) (Figure 5) consists of two emission bands due to the transitions: 5 D 0 → 7 F J (J = 1-3) and 5 D 0 → 7 F J (J = 4), as well as the 5 D 0 → 7 F 0 (forbidden transition), due to the impurity ion Eu 3+ . From the experimental PL spectra of the Zn 3 Nb 2 O 8 : 0.5% Eu 3+ nanocrystals (Figure 5a,b), the positional symmetry of the Eu 3+ ions in the host matrix can be established using the selection rules from group theory [72]. It is known that, due to the absence of the center of symmetry in the host matrix (caused by the 4 f orbital with the opposite even orbital), the appearance of electric dipole transitions premises 5 D 0 → 7 F J (J = even) might result, while the presence of the center of symmetry for impurity ions Eu 3+ in the host matrix allows magnetic dipole transitions 5 D 0 → 7 F J (J = odd).…”

Defects and Spectroscopic Investigation of Eu3+ Doping in MgGa2O4

“…[12,13] These models with this method have also been widely used and applied in several studies. [14][15][16][17][18] Atomic-scale simulation can be used to develop an understanding of the relationship between intrinsic defects caused by the presence of the Eu and how these defects affect the luminescent properties of the material. Thus, this work consists of computational modeling in order to shed light on the most energetically probable defects and their interaction with the lattice as well as to perform a crystalline field study of MgGa 2 O 4 :Eu.…”

“…[ 12,13 ] These models with this method have also been widely used and applied in several studies. [ 14–18 ]…”