期刊
JOURNAL OF LUMINESCENCE
卷 131, 期 3, 页码 445-448出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2010.11.035
关键词
Nanocrystals; LaAlO3; Phase transition; Chromium; Praseodymium
类别
资金
- Ministry of Science and Higher Education [N N507 372335]
In this study we report the preparation and spectroscopic properties of nanosized crystallites LaAlO3 doped with Pr3+ (1 mol%) and traces of Cr3+ ions, produced by the precipitation method. A new material has been obtained whose spectroscopic properties differ nominally from the same bulk of LaAlO3:Pr3+. It was observed that with increase in the nano-LaAlO3 sample diameter above 110 nm the perovskite structure changes from cubic to rhombohedral. As a result, the bigger samples have two orders of magnitudes of higher emission intensity when compared to the smaller ones. (C) 2010 Elsevier B.V. All rights reserved.
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