Please use this identifier to cite or link to this item:
|Title:||Strong photoluminescence with fine structures from sandwich-structured films of silicon nanoparticles embedded in Al2O3 matrices||Authors:||Ong, P.P.
|Issue Date:||Nov-2002||Citation:||Ong, P.P., Zhu, Y. (2002-11). Strong photoluminescence with fine structures from sandwich-structured films of silicon nanoparticles embedded in Al2O3 matrices. Physica E: Low-Dimensional Systems and Nanostructures 15 (3) : 118-123. ScholarBank@NUS Repository. https://doi.org/10.1016/S1386-9477(02)00445-9||Abstract:||Sandwich-structured thin films of silicon nanoparticles embedded in Al2O3 matrices were prepared by pulsed laser ablation on a slowly rotating target which alternately exposed the Si and Al2O3 materials to the laser beam. SIMS profile studies showed that the sharpness of the demarcation boundary between the Si and Al2O3 layers depended strongly on their annealing conditions. Correspondingly, the photoluminescence (PL) of the films was likewise found to depend strongly on annealing conditions. Very high-intensity and stable PL was achievable under the most appropriate annealing conditions. In addition, the PL spectra also contained multiple fine structures which did not depend on the annealing conditions. Annealing caused a significant blueshift of the main peak, but no corresponding blueshift of the fine structures was observed. Our results can be interpreted in relation to the quantum confinement model of the observed PL. The fine structures are attributed to the different interfacial states between the silicon nanocrystals and aluminum oxides. The intensity of the PL was strongly affected by the conditions of the Si-Al2O3 interfacial states in the films. © 2002 Elsevier Science B.V. All rights reserved.||Source Title:||Physica E: Low-Dimensional Systems and Nanostructures||URI:||http://scholarbank.nus.edu.sg/handle/10635/98043||ISSN:||13869477||DOI:||10.1016/S1386-9477(02)00445-9|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Jan 22, 2021
WEB OF SCIENCETM
checked on Jan 14, 2021
checked on Jan 17, 2021
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.