Synthesis, Characterization and Photoluminescence of Sr2CeO4: Dy3+, La3+) phosphor

In this work, pure Sr2CeO4 and Sr2CeO4: x=0.01, 0.1, 0.2, 0.5, 1.0mol% Dy3+, 0.5mol% La3+ phosphors were synthesized by solid state reaction method. X-ray diffraction (XRD) patterns confirmed that the samples exhibited an orthorhombic crystal structure. Room temperature photoluminescence (PL) analysis indicated that the excitation peak at around 260 nm, and all the samples showed intense blue emission at 470nm. Scanning Electron Microscope (SEM) images showed that the sample fired at 12000C exhibits grain like morphology with different sizes and shape. Fourier Transform Infrared Spectroscopy (FTIR) revealed the chemical bonds in the molecule, while the particle size distribution histogram indicated the mean diameter of sample. Commission international de l’eclairage (CIE) co-ordinates of samples revealed that the emission varies from blue to pale yellow with increasing of dysprosium concentration.