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Quantum confinement in multi-nanolayer sandwich systems

2017-11Journal article Restricted access
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dc.contributor.authorKhmelinskii, Igor
dc.contributor.authorMakarov, Vladimir I.
dc.date.accessioned2019-11-20T15:07:16Z
dc.date.available2019-11-20T15:07:16Z
dc.date.issued2017-11
dc.description.abstractPresently we explored quantum confinement (QC) in three-nanolayer sandwich systems, composed of Au-SnO2-Fe, Au-SnO2-Si and Au-SnO2-Ag layers. We recorded the absorption spectra of these sandwich systems, all with discrete structure. We recorded the action spectra of the photocurrent for the Au-SnO2-Fe sandwich system, with the photocurrent quantum yields increasing with the photon energy, achieving 3.1 at 4.7 x 10(4) cm(-1). The photocurrent action spectra correlate with high accuracy with optical absorption spectra. We discuss the mechanisms determining the absorption bandwidth value, including surface imperfections, thermal distribution of the vibrational level populations in the electronic ground state, and the diabatic coupling of levels of the excited state to those of a "dark" state. Volt-Ampere (V/A) characteristics were recorded for all three of the sandwich systems, quite similar to those of a Schottky diode. We report the parameter values of the V/A characteristics, found by fitting the experimental data with a theoretical curve. We also report charge density changes in the SnO2 layer caused by low constant voltage applied to the sandwich structure, observed as changes in the absorption band intensity.
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1016/j.jpcs.2017.06.032
dc.identifier.issn0022-3697
dc.identifier.issn1879-2553
dc.identifier.urihttp://hdl.handle.net/10400.1/12955
dc.language.isoeng
dc.peerreviewedyes
dc.publisherPergamon-Elsevier Science
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectNanofilms optical-spectra
dc.subjectMagnetoresistance
dc.subjectSpectroscopy
dc.subjectPlasmonics
dc.subjectEmission
dc.subjectDevice
dc.subjectFilter
dc.titleQuantum confinement in multi-nanolayer sandwich systems
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage363
oaire.citation.startPage354
oaire.citation.titleJournal of Physics and Chemistry of Solids
oaire.citation.volume110
person.familyNameKhmelinskii
person.givenNameIgor
person.identifier0000000420541031
person.identifier.ciencia-id0D1A-CB6C-6316
person.identifier.orcid0000-0002-6116-184X
person.identifier.ridC-9587-2011
person.identifier.scopus-author-id6701444934
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublicationfcb9f09f-2e99-41fb-8c08-7e1acbc65076
relation.isAuthorOfPublication.latestForDiscoveryfcb9f09f-2e99-41fb-8c08-7e1acbc65076

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