Optical Characterization of Eu3+ Doped and Undoped Sr2CeO4 Phosphors

Authors : İsrafil Şabikoğlu

Pages : 0-0

Doi:10.18466/cbujos.47793

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Publication Date : 2016-04-30

Article Type : Other Papers

Abstract :Optical Characterization of Eu 3+ Doped and Undoped Sr 2 CeO 4 Phosphors The typical blue phosphor Sr 2 CeO 4 material was prepared by different routes and also synthesized by different techniquies such as Pechini’s method, high temperature solid–state reaction, citrate–gel/sol-gel method, microwave calcination method, combustion method, and microwave–accelerated hydrothermal method. The luminescent compound materials doped with Europium (Eu) have various luminescence features in different lattice parameters, which are important in fields of displays (FEDs), plasma display panel devices, lamps and  cathode ray tubes (CRTs) etc.  In this study, a rare earth material Eu doped Sr 2 CeO 4 phosphors and undoped Sr 2 CeO 4 were synthesized by the conventional solid–state reaction method and characterized by X–ray diffraction (XRD), scanning electron microscopy images (SEM) and radioluminescence (RL) measurements. The Undoped Sr 2 CeO 4 has a broad band with a peak position around 500nm due to the charge transfer (CT) mechanism. The Eu is an excellent host lattice activator yielding a strong emission in comparison to the luminescence from the well–known Sr 2 CeO 4 . Strong red emission coming from the hypersensitive 5 D 0 ® 7 F 2 transition of Eu 3+ ion suggested the presence of the dopant ion in a structurally disordered environment. From the XRD data, the average crystallite sizes of undoped and Eu doped Sr 2 CeO 4 , calculated using the Scherer’s Formula are found to be 72nm and 73nm respectively.
Keywords : Radioluminescence RL, SolidState reaction method, inorganic compounds, Sr2CeO4, optical properties