Observation of Energy Transfer from Host to Rare-Earth Ions in Ca2SnO4:Pr3+ Phosphor
Red optical properties of Pr3+-doped Ca2SnO4 compounds prepared by the solid-state reaction at different atmospheres were investigated. Comparing with the air-sintered phosphor, a significant enhancement of the red emission intensity was observed for the vacuum-sintered phosphor. This improvement could be attributed to the increased oxygen vacancies, which act as the sensitizers for the effective energy transfer (ET) from Ca2SnO4 host to Pr3+. This study demonstrated that the ET process between the host and rare-earth ions in Ca2SnO4 was closely related to the oxygen vacancies.
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Document Type: Research Article
College of Materials Science and Engineering, Kunming University of Science and Technology,Kunming 650093, China
Department of Materials Science, School of Physical Science and Technology, Lanzhou University,Lanzhou 730000, China
Publication date: 2011-04-01