Investigation of Er~(3+) Doped in Na_2O-Al_2O_3-BaO-CaO-Sb_2O_3-B_2O_3 -SiO_2 Glasses: Physical, Optical and Visible Luminescence Properties

摘要

In this work, Na_2O-Al_2O_3-BaO-CaO-Sb_2O_3-B_2O_3-SiO_2 glasses doped with Er~(3+) was prepared and investigated for their physical, optical and visible luminescence properties. The increases in density, refractive index and molar volume of the glasses with additional doping content of Er_2O_3 into the network were due to a higher molecular weight and polarizability of Er_2O_3 in comparison with the glass former (SiO_2 and B_2O_3). Ten absorption peaks were observed as a nature of Er~(3+) absorption in glass matrices. The glass exhibited four emission transitions which were assigned to ~4F_(5/2)→~4I_(15/2) (460 nm), ~4F_(7/2)→~4I_(15/2) (487 nm), ~2H_(11/2)→~4I_(15/2) (522 nm) and ~4S_(3/2)→~4I_(15/2) (545 nm) transitions. The strongest intensity was the green emission at 522 nm. The luminescence intensity was found to increase with Er_2O_3 content up to 4 mol% and it was decreased for higher Er_2O_3 contents due to concentration quenching effect.