Analysis of emission of Eu3+ and Dy3+ doped Magnesium Boro-Tellurite (MBT) ceramics

Abstract

Rare earth (RE) ions play an important role in the improvement of the optical properties of ceramics. Rare-earth ceramics are commonly used in display panels, fluorescent lamps and lasers. The luminescence properties of Magnesium Boro-Tellurite (MBT) Eu 3 + and Dy 3 + doped ceramics have not been reported before. Therefore, the aim of this paper is to determine the effect of different compositions on the luminescence properties of the MBT material. A series of xTeO 2 –(70 - x)B 2 O 3 –30MgO ceramics with 10 6 x 6 40 mol % doped with 1 mol % of Eu 3 + and Dy 3 + ions was prepared via the solid-state reaction method. The influence of various compositions on the crystalline phase and photoluminescence properties of the samples were investigated by X-ray diffraction (XRD) and luminescence spectroscopy. The crystalline phases obtained in this study are Mg 3 (BO 3 ) 2 , MgB 4 O 7 , Mg 2 B 2 O 5 , Mg(Te 2 O 5 ) and MgTe 3 O 6 . It was stated that the crystalline phases have not changed as a result of doping with Eu 3 + and Dy 3 + ions. The emission spectra of Eu 3 + : MBT ceramics showed strong red emission at 612 nm due to the transition of 5 D 0 ? 7 F 2 and meanwhile, the Dy 3 + : MBT ceramics showed a blue emission at 480 nm due to 4 F 9 / 2 ? 6 H 15 / 2 transition and yellow emission at 576 nm due to 4 F 9 / 2 ? 6 H 13 / 2 transition. Both the rare-earth doped phosphors showed bright emission.