Studies on luminescence from a cerium-doped strontium stannate phosphor

• Published in: Luminescence (Chichester, England) England), 2015-06, Vol.30 (4), p.457-464
• Main Authors: Karabulut, Yüksel, Ayvacikli, Mehmet, Canimoglu, Adil, Garcia Guinea, Javier, Can, Nurdogan
• Format: Article
• Language: English
• Subjects: Cerium; Cerium - chemistry; Diffraction; Fading; Glow curves; Kinetics; Luminescence; Luminescent Agents - chemistry; Luminescent Measurements; Microscopy, Electron, Scanning; Morphology; Phosphors; Raman; rare earths; Spectrum Analysis, Raman; SrSnO3:Ce3; Stannates; Strontium; Strontium - chemistry; thermoluminescence; Tin Compounds - chemistry; X-Ray Diffraction; XRD
• ISSN: 1522-7235; 1522-7243
• DOI: 10.1002/bio.2760

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 ~ 127°C and the other at ~ 245°C 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.