학술논문
Growth and luminescent properties of Lu2SiO5 and Lu2SiO5:Ce single crystalline films
Document Type
Article
Author
Source
IOP Conference Series: Materials Science and Engineering; November 2010, Vol. 15 Issue: 1 p012010-012010, 1p
Subject
Language
ISSN
17578981; 1757899X
Abstract
Single crystalline films (SCF) of Lu2SiO5 (LSO) and Lu2SiO5:Ce (LSO:Ce) silicates with thickness of 2.5-21 mm were crystallised by liquid phase epitaxy method onto undoped LSO substrates from melt-solution based on PbO-B2O3 flux. The luminescence and scintillation properties of LSO and LSO:Ce SCFs were compared with the properties of a reference LSO:Ce and LYSO:Ce crystals. The light yield (LY) of LSO and LSO:Ce SCF reaches up 30 % and 145 %, respectively, of that of a reference LSO:Ce crystal under excitation by a-particles of 241Am source (5.5 MeV). We found that the luminescence spectrum of LSO:Ce SCF is red-shifted with respect to the spectrum of a reference LSO:Ce crystal. Differences in luminescence properties of LSO:Ce SCF and single crystal are explained by the different distribution of Ce3+ over the Lu1 and Lu2 positions of LSO host and are also due to Pb2+ contamination in the former.