Journal
JOURNAL OF LUMINESCENCE
Volume 132, Issue 10, Pages 2590-2594Publisher
ELSEVIER
DOI: 10.1016/j.jlumin.2012.05.027
Keywords
Optical materials; Optical properties
Categories
Funding
- National Nature Science Young Foundation of China [10904057]
- National Innovation Experiment Program for University Students [101073005]
- Fundamental Research Funds for the Central Universities [Lzjbky-2011-125, lzujbky-2011-126]
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In order to interpret the origin of two emission quenching concentrations and a sharp increase of afterglow at certain Sm3+ doping concentration in Ba2SnO4:Sm3+ phosphor, the Eu3+ is used as a probe and it reveals that the Sm3+ ions occupy Sn4+ sites at low Sm3+ concentration and then the Ba2+ sites at a high concentration. The Sm3+ centers at different sites lead to two quenching processes and the two quenching concentrations effect. The thermoluminescence reveals that the substitution of Sm3+ for Ba2+ sites will induce a large amount of shallow hole traps and it should be mainly responsible for the sharp enhancement of the afterglow. (C) 2012 Elsevier B.V. All rights reserved.
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