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Article: Optical properties of silicon nanocrystals embedded in a SiO2 matrix

TitleOptical properties of silicon nanocrystals embedded in a SiO2 matrix
Authors
Issue Date2005
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B - Condensed Matter And Materials Physics, 2005, v. 72 n. 12 How to Cite?
AbstractOptical properties of isolated silicon nanocrystals (nc-Si) with a mean size of ∼4nm embedded in a SiO2 matrix that was synthesized with an ion beam technique have been determined with spectroscopic ellipsometry in the photon energy range of 1.1-5.0 eV. The optical properties of the nc-Si are found to be well described by both the Lorentz oscillator model and the Forouhi-Bloomer (FB) model. The nc-Si exhibits a significant reduction in the dielectric functions and optical constants and a large blueshift (∼0.6eV) in the absorption spectrum as compared with bulk crystalline silicon. The band gap of the nc-Si obtained from the FB model is ∼1.7eV, showing a large band gap expansion of ∼0.6eV relative to the bulk value. The band gap expansion is in very good agreement with the first-principles calculation of the nc-Si optical gap based on quantum confinement. © 2005 The American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/80910
ISSN
2014 Impact Factor: 3.736
2015 SCImago Journal Rankings: 1.933
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorDing, Len_HK
dc.contributor.authorChen, TPen_HK
dc.contributor.authorLiu, Yen_HK
dc.contributor.authorNg, CYen_HK
dc.contributor.authorFung, Sen_HK
dc.date.accessioned2010-09-06T08:11:38Z-
dc.date.available2010-09-06T08:11:38Z-
dc.date.issued2005en_HK
dc.identifier.citationPhysical Review B - Condensed Matter And Materials Physics, 2005, v. 72 n. 12en_HK
dc.identifier.issn1098-0121en_HK
dc.identifier.urihttp://hdl.handle.net/10722/80910-
dc.description.abstractOptical properties of isolated silicon nanocrystals (nc-Si) with a mean size of ∼4nm embedded in a SiO2 matrix that was synthesized with an ion beam technique have been determined with spectroscopic ellipsometry in the photon energy range of 1.1-5.0 eV. The optical properties of the nc-Si are found to be well described by both the Lorentz oscillator model and the Forouhi-Bloomer (FB) model. The nc-Si exhibits a significant reduction in the dielectric functions and optical constants and a large blueshift (∼0.6eV) in the absorption spectrum as compared with bulk crystalline silicon. The band gap of the nc-Si obtained from the FB model is ∼1.7eV, showing a large band gap expansion of ∼0.6eV relative to the bulk value. The band gap expansion is in very good agreement with the first-principles calculation of the nc-Si optical gap based on quantum confinement. © 2005 The American Physical Society.en_HK
dc.languageengen_HK
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/en_HK
dc.relation.ispartofPhysical Review B - Condensed Matter and Materials Physicsen_HK
dc.rightsPhysical Review B (Condensed Matter and Materials Physics). Copyright © American Physical Society.en_HK
dc.titleOptical properties of silicon nanocrystals embedded in a SiO2 matrixen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1098-0121&volume=72&spage=125419:1&epage=7&date=2005&atitle=Optical+properties+of+silicon+nanocrystals+embedded+in+a+SiO2+matrixen_HK
dc.identifier.emailFung, S: sfung@hku.hken_HK
dc.identifier.authorityFung, S=rp00695en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1103/PhysRevB.72.125419en_HK
dc.identifier.scopuseid_2-s2.0-29744457259en_HK
dc.identifier.hkuros109247en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-29744457259&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume72en_HK
dc.identifier.issue12en_HK
dc.identifier.isiWOS:000232229400136-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridDing, L=21233704100en_HK
dc.identifier.scopusauthoridChen, TP=7405540443en_HK
dc.identifier.scopusauthoridLiu, Y=36064444100en_HK
dc.identifier.scopusauthoridNg, CY=8604409400en_HK
dc.identifier.scopusauthoridFung, S=7201970040en_HK
dc.identifier.citeulike2911879-

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