Optical and Luminescence Characteristic of Dy3+ Doped ZnO-Bao-TeO2 Glass System
Properties of Dy3+doped ZnO-BaO-TeO2(ZBaT) glass systems with composition 15ZnO-5BaO-(80-x)TeO2-xDy2O3was measured for the composition range 1x8 (in mol%). The glasses were prepared by normal melt quenching technique and characterized their physical, optical and photoluminescence properties. The optical absorption spectra show peaks at4I15/2(466 nm),4F9/2(475 nm),6F3/2(756 nm),6F5/2(804 nm),6F7/2+6H5/2(904 nm),6F9/2+6H7/2(1096 nm),6F11/2+6H9/2(1280 nm) and6H11/2(1640 nm), reflecting the Dy3+in glass matrices. From the excitation spectra, five obvious excitation peaks were observed as follows: The ground state6H15/2to the excited states4M7/2+6P7/2(351nm),4I11/2(366 nm),4I13/2+4F7/2(385 nm),4G11/2(426 nm) and4I15/2(450 nm) of Dy3+. The emission band at 484, 575 and 661 nm arising from the transition4F9/26H15/2,4F9/26H13/2and4F9/26H11/2respectively were observed when the sample was excited by xenon flash lamp at 450 nm. The ZBaT glass doped with 1 mol% of Dy3+gives the highest result for luminescence properties.