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Observation of Energy Transfer from Host to Rare-Earth Ions in Ca2SnO4:Pr3+ Phosphor

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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

Affiliations: 1: College of Materials Science and Engineering, Kunming University of Science and Technology,Kunming 650093, China 2: Department of Materials Science, School of Physical Science and Technology, Lanzhou University,Lanzhou 730000, China

Publication date: 2011-04-01

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