Synthesis, structure and thermoluminescence studies on Dy~(3+) doped Sr_2SiO_4 phosphor

摘要

Synthesis of Sr_2SiO_4; Dy~(3+) phosphor via high temperature solid state reaction (SSR) method has been reported. The crystal structure was verified through x-ray diffraction (XRD) characterization and it was revealed that the sample has crystalized into orthorhombic structure with space group Pmnb further verified using Rietveld refinement. The compositional verification has been done employing energy dispersive analysis of x-ray diffraction. Morphology studies depict agglomeration process has taken place and present growth of grain size. Thermo-luminescence (TL) studies displayed a main glow peak at around 134°C in addition, there are two less intense glow curve associated with the main glow curve at around 206°C, and 260°C. TL parameters such as activation energy (E), shape factor (μ) were also calculated. The dielectric studies revealed low values for both the dielectric constant and dielectric loss values.