The luminescence of Sm in alkaline earth borophosphates |
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Authors: | Qinghua Zeng |
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Affiliation: | Department of Chemistry, School of Molecular and Microbial Sciences, The University of Queensland, St. Lucia, QLD 4072, Queensland, Australia |
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Abstract: | The temperature-dependent luminescence of Sm2+ ions in MBPO5 was studied. At low temperature, Sm2+ in this series shows 4f6→4f6 luminescence with only a single emission line observed for the transition, revealing that only one crystallographic cationic site is available for Sm2+ in all the hosts. With increasing temperature, the emission intensity of the transition increases whereas that of the transitions decreases. The transitions of Sm2+ were observed in BaBPO5 and its intensity increases with increasing temperature. At , a broad band of the 4f55d→4f6 luminescent transition of Sm2+ in SrBPO5 and BaBPO5 with maximum at appears due to the thermal population. The lifetime of the transition was recorded at different temperatures, showing a single exponential decay for Sm2+ in SrBPO5 and BaBPO5 but a non-single-exponential decay in CaBPO5. |
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Keywords: | 78.55.&minus m 78.20.&minus e 42.62.Fi |
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