The influence of the host lattice on the luminescence of divalent europium

摘要: The luminescence of Eu2+ in several silicate host lattices has been studied. In these structures there are chains alkaline earth ions. some cases the ion shows emission at long wavelengths. This effect is due to preferential orientation a d-orbital. (Ca, Sr)2MgSi2O7:Eu2+ it shown that if cell parameters increased by replacing (part of) calcium strontium ions, d-orbital chain direction decreases and shifts shorter However, SrSiO3:Eu2+ CaSiO3:Eu2+ ions close each other blue observed. indicates only one required obtain low energy. Finally, BaSiO3:Eu2+, BaSi2O5:Eu2+ Sr2LiSiO4F:Eu2+, where network through lattice, conduction band lowered an impurity-trapped exciton situation similar BaF2:Eu2+.