Luminescence of europium(III) and manganese(II) in barium and zinc orthosilicate

The aim of this work is to report on the luminescence properties of BaZnSiO 4 activated by Eu3+ and Mn2+ ions. Doped and undoped powder samples were pr epared by solid-state reaction starting from oxides and carbonates or Ba2Si O4:Eu3+ and Zn2SiO4:Mn2+ precursors. X-ray diffraction powder data, IR vibr ational, and UV-vis luminescence spectroscopies were carried out. Results s howed that doped and undoped samples from both types of precursors have the same structure and crystallize with a superstructure of hexagonal kalsilit e. Vibrational spectroscopy has confirmed the formation of a silicate group , which outlines differences between products and silicate precursors. The observed luminescence assigned to Eu3+ and Mn2+ transitions covered most pa rts of the visible spectrum, an important requirement for phosphors in fluo rescent low-pressure mercury vapor lamps.