Luminescence of Ce doped LaCl<sub>3</sub> microcrystals incorporated into a single-crystalline NaCl host
Vistovskyy, V V; Savchyn, P V; Stryganyuk, G B; Voloshinovskii, A S; Pidzyrailo, M S; Vistovskyy, V V; Ivan Franko National University of Lviv, 8 Kyryla and Mefodiya Street, 79005 Lviv, Ukraine; Savchyn, P V; Ivan Franko National University of Lviv, 8 Kyryla and Mefodiya Street, 79005 Lviv, Ukraine; Stryganyuk, G B; HASYLAB at DESY, Notkestraße 85, 22607 Hamburg, Germany ; Institute for Materials, SRC ‘Carat’, 202 Stryjska Street, 79031 Lviv, Ukraine; Voloshinovskii, A S; Ivan Franko National University of Lviv, 8 Kyryla and Mefodiya Street, 79005 Lviv, Ukraine; Pidzyrailo, M S; Ivan Franko National University of Lviv, 8 Kyryla and Mefodiya Street, 79005 Lviv, Ukraine
Журнал:
Journal of Physics: Condensed Matter
Дата:
2008-08-13
Аннотация:
Formation of LaCl<sub>3</sub>:Ce microcrystals embedded in an NaCl host has been revealed for NaCl–LaCl<sub>3</sub> (1 mol%)–CeCl<sub>3</sub> (0.05 mol%) composition by means of scanning electron microscopy (SEM) and luminescence spectroscopy techniques. Scanning electron microscopy has shown the size of LaCl<sub>3</sub>:Ce microcrystals to be in the 10–100 µm range. Spectral-kinetic characteristics of NaCl–LaCl<sub>3</sub> (1 mol%)–CeCl<sub>3</sub> (0.05 mol%) luminescence have been studied upon excitation in the ultra violet–visible ultraviolet (UV–VUV) spectral range. Luminescent properties of LaCl<sub>3</sub>:Ce microcrystals in NaCl–LaCl<sub>3</sub> (1 mol%)–CeCl<sub>3</sub> (0.05 mol%) are shown to be substantially similar to those of bulk LaCl<sub>3</sub>:Ce (1 mol%) crystal. The energy transfer mechanism from the NaCl host and LaCl<sub>3</sub> microcrystal to cerium centres is discussed.
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