Xanes At Eu-L-3 Edge And Valence Of Europium In Srb4o7 : Eu And Bab8o13 : Eu

The luminescent materials SrB4O7:Eu and BaB8O13:Eu were synthesized, and the valence states of europium in the materials were measured by means of XANES at Eu-L-3 edge. It is found that the Ed(3+) and Eu2+ ions are all present in the materials, and more Eu3+ ions can be reduced in SrB4O7:Eu than in BaB8O13:Eu. The excitation and emission spectra of Eu3+ in SrB4O7:Eu and BaB8O13:Eu were determined.