期刊
MATERIALS LETTERS
卷 71, 期 -, 页码 137-140出版社
ELSEVIER
DOI: 10.1016/j.matlet.2011.12.059
关键词
Silicon carbide; Silicon dioxide; Nanowires; Core-shell; Cathodoluminescence
资金
- Italian Ministry of Foreign Affairs
The luminescence properties of SiC/SiO2 core/shell nanowires with different core to shell thickness ratio are analysed by SEM-Cathodoluminescence spectroscopy. The different radial NW structure, studied by transmission electron microscopy, deeply influences the efficiency of competitive radiative transitions. As the core to shell ratio decreases, the increase of a UV emission component is observed indicating that the electron-hole pairs recombine directly in the silicon dioxide and the beneficial effect of shell-induced enhancement of the core emissions is less efficient. (C) 2011 Elsevier B.V. All rights reserved.
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