Luminescent properties of Tb3+ and Gd3+ ions doped aluminosilicate oxyfluoride glasses

Tb3+ and Gd3+ ions doped lithium–barium–aluminosilicate oxyfluoride glasses have been prepared. The transmission, emission and excitation spectra were measured. It has been found that those Tb3+-doped lithium–barium–aluminosilicate oxyfluoride glasses exhibit good UV-excited luminescence. The luminescence intensity of Tb3+ ion increases for those (Tb3+, Gd3+)-codoped glasses. Energy transfer process from Gd3+ ion to Tb3+ ion is indicated.

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► Different concentration Tb3+-doped and (Tb3+, Gd3+)-codoped lithium–barium–aluminosilicate oxyfluoride glasses were fabricated by melt-quenching method.
► 5D4 → 7Fj emissions are enhanced in Tb3+-doped lithium–barium–aluminosilicate oxyfluoride glasses with the increase of Tb3+ ion concentration.
► Gd3+ ion sensitizes Tb3+ ion and enhances the luminescence intensity of Tb3+ ions in (Tb3+, Gd3+)-codoped lithium–barium–aluminosilicate oxyfluoride glasses.