Abstract
Cerium (Ce3+) doped strontium, barium orthogermanate samples are prepared by conventional solid state mixing method. In this process, X-ray powder diffraction (XRD), Field emission scanning electron microscopy (FESEM), Energy-dispersive X-ray spectroscopy (EDAX) and Photoluminescence (PL) measurements are carried out for the synthesized phosphors. The orthorhombic structure is confirmed by X-ray diffraction of the phosphors. EDAX is confirmed that all the elements are present in the compound such as Sr, Ba, Ge, O and Ce. Photoluminescence studies of Sr2GeO4: Ce3+ and Ba2GeO4: Ce3+ phosphors show intense blue emissions at 438 and 429 nm under ultraviolet excitation respectively. These phosphors are ascribed due to the 5d → 2F5/2,2F7/2 electronic transitions of cerium ions. Therefore, these phosphors may be applicable in the display devices and lamp industry as blue emitting phosphors.
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