Emission modulation of Eu3+ via symmetry around dodecahedron in garnet-type Ca2EuZr2-Sn Ga3O12 (x = 0, 0.5, 1, 1.5, and 2) phosphors

Anomalous intense emission of the 5D0/7F4 transition for reddish-orange light-emitting and fluorescent probe for multiple lattice sites in β-PbF2:Eu3+/K+ oxyfluoride glass ceramics

“…Thus, the spectrum of Eu 3+ is clearly dominated by the 5 D 0 / 7 F 4 band generally originating from Eu 3+ ions occupying higher ranks symmetric sites, such as D 4d . 64–66 From the perspective of chemical environment, the higher polarizability of the Eu 3+ ion bonding environment always results in a high intensity of the 5 D 0 / 7 F 4 transition. 67–69 In β-PbF 2 :Eu 3+ GCs (S0 sample), the Eu 3+ ions enter the β-PbF 2 lattice by substituting Pb 2+ ions, forming an EuF 8 coordination polyhedron with one compensated F i − ion at the nearest neighbor (NN) or next-nearest neighbor (NNN) interstitial sites, and isolated F i − defects, as shown in Fig.…”