Article ID Journal Published Year Pages File Type
1618752 Journal of Alloys and Compounds 2010 6 Pages PDF
Abstract

The luminescent properties of the Sr2MgSi2O7:Eu2+ phosphor have been investigated with different co-dopants. The co-dopants have no influence on the position of emission peak but the intensity of the emission and the afterglow. It associates with the decay of the afterglow. A cluster model involving the cation vacancies, the oxygen vacancies and the Dy3+ ions is proposed. These clusters provide the deep traps which trap the carriers more effectively. It leads to a greater intensity and longer duration of the afterglow. The La3+ ions do not enhance the TL intensity since the La2+ ions have a very high ionization and 4f → 5d energies. The experiment shows that the oxygen and the Sr2+ vacancies are not the crucial defects on the enhancement of the afterglow properties unless they aggregate with some suitable Re3+ ions.

Related Topics
Physical Sciences and Engineering Materials Science Metals and Alloys
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