Vacuum ultraviolet optical properties of MO–Y2O3–B2O3:Re (M=Mg,Sr; Re=Eu,Tb,Ce,Gd)

A series of phosphors MO–Re2O3–B2O3:Eu3+ (M=Mg,Sr; Re=Eu,Tb,Ce,Gd) were prepared and studied. Excitation spectra indicated a high absorption in vacuum ultraviolet (VUV) region. Strong emissions peaked at 591 and 613 nm, which were corresponding to the 5D0→7FJ (image) transition of Eu3+ when excited under VUV. In addition to the host absorption band of MgO–Y2O3–B2O3, absorption bands around 172, 178, 195, 204, 225 nm, were found which were corresponding to the 4f8–4f75d transition of Tb3+ of MgO–Y2O3–B2O3:Re (Ce,Tb,Gd). Their energy transfer (Gd3+–Tb3+) was further discussed.