Abstract
Luminescence properties of BaY2O4:Eu3+ are investigated by the site-selective laser-excitation spectroscopy in the temperature region 15–300 K. The phosphors were synthesized by the Pechini-type sol-gel method for different Eu3+-concentrations. Three different crystallographic sites corresponding to two Y3+ sites (Y1 and Y2) and the Ba site for Eu3+ are identified from the excitation spectra due to the 7F0 → 5D0 transition. Crystal-field splittings of the 7F1 and 7F2 multiplets lead to classify three different sites for Eu3+ in BaY2O4 lattice. Luminescence decays and spectral features at each site depend strongly on temperature and Eu3+-concentration in BaY2O4:Eu3+.
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