Photoluminescence Characteristics of Sr2SiO4:Pb2+ Nano Phosphor by a Combustion Method

In this study, lead doped strontium silicate (Sr2SiO4:Pb2+) phosphor was synthesized by a combustion method and the luminescent characteristics were investigated. This was done using X-ray diffraction (XRD), a Scanning Electron Microscope (SEM), and by measuring the photoluminescence (PL). At different temperatures, the XRD patterns showed the pure Sr2SiO4 phase. The intensity of the XRD peak showed its highest value at 1000 degrees C. The PL intensity was observed to improve with an increasing sintering temperature (up to 1000 degrees C), but a quenching effect appeared at 1200 degrees C. The emission spectrum for a 291 nm excitation showed a single band, which peaked at 425 nm. The SEM images showed that with an increased sintering temperature the phosphor particles became spherical.