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EnglishNanocrystalline X2 monoclinic lutetium oxyorthosilicate (X2-Lu2SiO5) doped with Pr3+ ions was synthesized by the soft sol-gel route. The product was characterised with X-ray diffraction and transmission electron microscopy to confirm the crystal structure and analyse the morphology on the nano- and micro-scales. The luminescence spectroscopy and the excited state dynamics were investigated employing time-resolved VUV spectroscopy upon excitation with synchrotron radiation. Fast and efficient host-to-impurity energy transfer was observed. The temperature dependence of 5d-4f emission decay dynamics was investigated. In view of a potential application as a nanostructured scintillator, the X-ray excited luminescence of the X2-Lu2SiO5 nanopowder was studied. Excitation and relaxation processes occurring in the nanocrystalline Lu2SiO5:Pr3+ are analyzed and discussed.
| Titolo: | Structural characterisation and time-resolved luminescence spectroscopy of nanocrystalline X2-Lu2SiO5:Pr3+ powders |
| Autori: | |
| Data di pubblicazione: | 2013 |
| Rivista: | |
| Abstract: | Nanocrystalline X2 monoclinic lutetium oxyorthosilicate (X2-Lu2SiO5) doped with Pr3+ ions was synthesized by the soft sol-gel route. The product was characterised with X-ray diffraction and transmission electron microscopy to confirm the crystal structure and analyse the morphology on the nano- and micro-scales. The luminescence spectroscopy and the excited state dynamics were investigated employing time-resolved VUV spectroscopy upon excitation with synchrotron radiation. Fast and efficient host-to-impurity energy transfer was observed. The temperature dependence of 5d-4f emission decay dynamics was investigated. In view of a potential application as a nanostructured scintillator, the X-ray excited luminescence of the X2-Lu2SiO5 nanopowder was studied. Excitation and relaxation processes occurring in the nanocrystalline Lu2SiO5:Pr3+ are analyzed and discussed. |
| Handle: | http://hdl.handle.net/11562/536349 |
| Appare nelle tipologie: | 01.01 Articolo in Rivista |
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