Photoluminescence properties of Sr(Y, Gd)2O4:Eu3+under VUV excitation

Vacuum ultraviolet (VUV) excitation and photoluminescence (PL) properties of Sr(Y, Gd)2O4 doped with Eu3+ were studied. The excitation spectra of SrY1.9Eu0.1O4 and SrY1.0Gd0.9Eu0.1O4 had absorption in the VUV region with the absorption band edge at 149 nm, while the absorption of SrGd1.9Eu0.1O4 in the VUV region was weak, which could be due to the narrow host band gap and no efficient energy transfer occurred in the VUV region. The PL spectra of all samples exhibited the characteristic emission of Eu3+ with the red 5D0-7F2 transition (611 nm) being the most prominent group.