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dc.contributor.author
Borrero Gonzalez, Luis Jose
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Nunes, L. A. O.
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Guimaraes, F. E. G.
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Wojcik, J.
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Mascher, P.
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Gennaro, Ana Maria
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Tirado, Monica Cecilia
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Comedi, David Mario
dc.date.available
2017-06-23T20:23:22Z
dc.date.issued
2012-06
dc.identifier.citation
Borrero Gonzalez, Luis Jose; Nunes, L. A. O.; Guimaraes, F. E. G.; Wojcik, J.; Mascher, P.; et al.; Growing Si Nanocrystals within a-Si Nanoclusters Embedded in a-SiO2: Evolution of Photoluminescence; The Electrochemical Society; ECS Transactions; 45; 5; 6-2012; 11-19
dc.identifier.issn
1938-6737
dc.identifier.uri
http://hdl.handle.net/11336/18807
dc.description.abstract
We combine X-ray absorption, electron spin resonance and Raman spectroscopies, X-ray diffraction and photoluminescence (PL) techniques to determine the structure and luminescence mechanisms in Si nanoclusters (Si-ncls) embedded within Si oxides at various intermediate formation stages. The Si-ncls/oxide systems are fabricated by thermally annealing plasma-enhanced chemical vapor deposited Si-rich Si-oxide films. The structural and chemical orders in the amorphous oxide matrix, the Si-ncls amorphous and crystalline volume fractions and sizes, the dangling bond density and PL spectra and decay rates are followed closely as a function of the annealing temperature. The results can be interpreted by a crystalline core/amorphous shell model for the Sincls. The important role of the shell, often ignored in the literature, is discussed. As the Si-ncls crystalline cores grow at the expense of thinning amorphous shells, the PL undergoes a transition from a regime dominated by disorder-induced effects to a situation where quantum confinement prevails.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
The Electrochemical Society
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Si-Rich Si Oxides
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X-Ray Diffraction
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Electron Spin Resonance Spectroscopy
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Raman Spectroscopy
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Física de los Materiales Condensados
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Growing Si Nanocrystals within a-Si Nanoclusters Embedded in a-SiO2: Evolution of Photoluminescence
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-06-21T18:38:27Z
dc.journal.volume
45
dc.journal.number
5
dc.journal.pagination
11-19
dc.journal.pais
Estados Unidos
dc.description.fil
Fil: Borrero Gonzalez, Luis Jose. Universidade de São Paulo; Brasil
dc.description.fil
Fil: Nunes, L. A. O.. Universidade de São Paulo; Brasil
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Fil: Guimaraes, F. E. G.. Universidade de São Paulo; Brasil
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Fil: Wojcik, J.. McMaster University; Canadá
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Fil: Mascher, P.. McMaster University; Canadá
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Fil: Gennaro, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
dc.description.fil
Fil: Tirado, Monica Cecilia. Universidad Nacional de Tucumán; Argentina
dc.description.fil
Fil: Comedi, David Mario. Universidad Nacional de Tucumán; Argentina
dc.journal.title
ECS Transactions
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1149/1.3700405
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://ecst.ecsdl.org/content/45/5/11
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