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dc.contributor.authorLioudakis, Emmanouil E.en
dc.contributor.authorKoupanou, E.en
dc.contributor.authorKanari, C.en
dc.contributor.authorLeontidis, Epameinondasen
dc.contributor.authorOthonos, Andreas S.en
dc.creatorLioudakis, Emmanouil E.en
dc.creatorKoupanou, E.en
dc.creatorKanari, C.en
dc.creatorLeontidis, Epameinondasen
dc.creatorOthonos, Andreas S.en
dc.date.accessioned2019-11-21T06:21:12Z
dc.date.available2019-11-21T06:21:12Z
dc.date.issued2008
dc.identifier.urihttp://gnosis.library.ucy.ac.cy/handle/7/55797
dc.description.abstractIn this work, we have used spectroscopic ellipsometry to study the optical properties of polyelectrolyte-PbS quantum dot (QD) multilayer films prepared using the layer by layer self-assembly method. The optical results provide information about the absorption coefficients of the materials as a function of the number of layers deposited on a quartz substrate. We have found that the fundamental energy gap of the films decreases linearly upon addition of each layer due to the formation of nanoclusters at the surface. Furthermore, the influence of PbS QD concentration in colloidal dispersion on the energy gap of the materials is examined in detail, and it is found that the optical band gap in the films is in agreement with the linear absorption measurements in the PbS colloidal dispersion from which the film deposition takes place. Finally, the observed electronic transitions of the films corroborate that nanoparticles in the regime of strong quantum confinement are present in the films. This comprehensive fundamental study provides important information, necessary for photovoltaic applications, about the absorption tunability of these nanofilms. © 2008 American Institute of Physics.en
dc.sourceJournal of Applied Physicsen
dc.source.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-43049101125&doi=10.1063%2f1.2906121&partnerID=40&md5=9c09345ab4f8932cc61423d9c18f6b27
dc.subjectEnergy gapen
dc.subjectDepositionen
dc.subjectMultilayer filmsen
dc.subjectSelf assemblyen
dc.subjectSemiconductor quantum dotsen
dc.subjectPolyelectrolytesen
dc.subjectSpectroscopic ellipsometryen
dc.subjectElectronic transitionsen
dc.subjectLinear absorption measurementsen
dc.subjectOptical band gapen
dc.subjectQuartz substratesen
dc.titleOptical properties of polyelectrolyte quantum dot multilayer films prepared using the layer by layer self-assembly methoden
dc.typeinfo:eu-repo/semantics/article
dc.identifier.doi10.1063/1.2906121
dc.description.volume103
dc.description.issue8
dc.author.faculty002 Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied Sciences
dc.author.departmentΤμήμα Χημείας / Department of Chemistry
dc.type.uhtypeArticleen
dc.source.abbreviationJ.Appl.Phys.en
dc.contributor.orcidOthonos, Andreas S. [0000-0003-0016-9116]
dc.contributor.orcidLeontidis, Epameinondas [0000-0003-4427-0398]
dc.gnosis.orcid0000-0003-0016-9116
dc.gnosis.orcid0000-0003-4427-0398


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