Studies on luminescence from a cerium-doped strontium stannate phosphor
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Date
2015
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Abstract
The crystal structure and morphology of Ce3+-doped SrSnO3 materials prepared using the solid-state reaction method were extensively characterized using experimental techniques. X-Ray diffraction results show that the cerium substitution of strontium does not change the structure of the strontium stannate. Raman spectroscopy was used to investigate the microstructures and lattice vibrations. Environmental scanning electron microscopy images showed that phosphors aggregate and their particles form irregular shapes. SrSnO3 exhibits an intense green emission with a broad band originating from the 5d1 → 4f1 transition of cerium. It was observed that, after exposure to beta-irradiation, the glow curve of this material has two broad thermoluminescence peaks, one centered at ∼ 127C and the other at ∼ 245C for a heating rate of 5 K/s. The kinetic parameters, which include the frequency factor and the activation energy of the material, were calculated using Chen's method, after beta-irradiation. The fading and reusability of the phosphor were also studied and it was found that the phosphor is suitable for radiation dosimetry. Copyright © 2014 John Wiley & Sons, Ltd. Copyright © 2014 John Wiley & Sons, Ltd.
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Cerium , Kinetics , Luminescence , Luminescent Agents , Luminescent Measurements , Microscopy, Electron, Scanning , Spectrum Analysis, Raman , Strontium , Tin Compounds , X-Ray Diffraction , Activation energy , Cerium compounds , Irradiation , Phosphors , Rare earths , Reusability , Solid state reactions , Strontium , Strontium compounds , Tin compounds , X ray diffraction , cerium , luminescent agent , strontium , tin derivative , Beta irradiations , Ce 3+ , Cerium-doped , Crystal structure and morphology , Raman , Rare-earths , Solid state reaction method , SrSnO3:ce3+ , Stannates , XRD , chemistry , kinetics , luminescence , Raman spectrometry , scanning electron microscopy , X ray diffraction , Scanning electron microscopy