Synthesis and Characterization of Eu, Tb doped Y2SiO5 Phosphors

The structural and the optical properties of Terbium and Europium doped yttrium silicate phosphor particles were analyzed. The samples were prepared through solid state reaction method and investigated in a doping concentration of Tb(2%) and Eu(1.5%). The prepared phosphors are characterized using X-ray diffraction (XRD), SEM.FTIR and PL emission of Y2SiO5 phosphor doped with Tb(2%) and Eu(1.5%) was studied. The observed PL emission is at 380 nm followed by the emissions with good intensity at 487, 545, 586, 613 and 622nm. The present phosphor may be a good candidate for LED

Synthesis and Characterization of Er Doped CaZrO3 Phosphors

The present paper reports the synthesis and Photoluminescence (PL) studies of the Er rare earth ions doped in CaZrO3 phosphor at a concentration of 2 mol%. Starting materials like Calcium carbonate (CaCO3), Zirconium oxide(ZrO2),Erbium Oxide (Er2O3). The samples were prepared by the conventional solid-state reaction method, which is the most suitable for large-scale product ion. The received phosphor samples were characterized using XRD, SEM and PL techniques. Undoped CaZrO3 exhibits good photoluminescence emission. The PL emission mainly concentrates around 467 nm, when excited with 254 nm wavelengths. The CaZrO3 phosphor, when doped with Er the PL emission was observed from 400 to 560 nm range peaks around 527 ,531,545 and 553nm with high intensity. The present phosphor can act as host for greenlight emission in compact fluorescent (CFL) and fluorescent lamps