Synthesizing and photoluminescence properties of Eu³⁺-doped germanate and Dy³⁺-doped silicate hosts

The Eu³⁺-doped germanate (Mg₄GeO₆ and Ba₂GeO₄) and Dy³⁺-doped silicate (Li₃SiO₄) hosts were prepared by solid state reaction in this study. Dy³⁺-ion for Mg₄GeO₆ and Ho³⁺-ion for both Ba₂GeO₄ and Li₃SiO₄ were used as co-dopants for these systems. The heat treatments were performed with reference to the DTA/TG results. The repeated and increased heat treatments used for the systems, the single phase crystals determined by the powder x-ray diffraction (XRD) analysis. Thus, the Mg₄GeO₆ and Ba₂GeO₄ systems formed additionally, the Li₃SiO₄ system could not be formed or indexed for any phase. Considerable photoluminescence (PL) thermoluminescence (TL) results were achieved due to the transitions of the Eu³⁺-, Dy³⁺- and Ho³⁺-ions.