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The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including those from the School of Psychological Sciences & Health - but also papers by researchers based within the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

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Long-lasting phosphorescence in Ce-doped oxides

Yamaga, M. and Ohsumi, Y. and Nakayama, T. and Kashiwagura, N. and Kodama, N. and Han, T.P.J. (2009) Long-lasting phosphorescence in Ce-doped oxides. Journal of Materials Science: Materials in Electronics, 20 (Supple). pp. 471-475. ISSN 0957-4522

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Abstract

Although oxide crystals doped with Ce3+ are not useful in laser operation, they have advantage in the areas such as scintillators and passive optical sources. Scintillator materials require high light-yield and fast fluorescence decay time. However, when the crystalline quality is degraded by defects created during the crystal growth process, afterglow from the crystals is observable persistently. Such phosphorescence is undesirable for scintillators, but useful in passive optical sources. The phosphorescence observed in Ca2Al2SiO7 doped with Ce3+ ions has been investigated in detail and a model is proposed to explain the mechanism responsible.