IJSR - International Journal of Scientific Research

Savali Ravi Kumar; Ch. Atchyutha Rao; K.V.R.Murthy

Volume : VII, Issue : IV, April - 2018

Synthesis, Characterization and Photoluminescence of Sr2CeO4: x=0.01, 0.1, 0.2, 0.5, 1.0 mol % Dy3+ (0.5 mol% La3+) phosphor

Savali Ravi Kumar, Ch. Atchyutha Rao, K. V. R. Murthy

Abstract :

In this article,pure Sr₂CeO₄and 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 disclosed that thesamplesexhibited an orthorhombic crystal structure.Room temperature photoluminescence (PL) analysis indicated that theexcitation peaking at around 260 nm, and all the samples showed intensely blue emission at 470nm.Scannimg 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) determined the chemical bonds in a molecule and 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.