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Copper Doping of Low-Dimensional Se-Based Semiconductor Structures Grown by Molecular Beam Epitaxy

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cris.lastimport.scopus2024-02-12T20:53:28Z
dc.abstract.enCopper-doped self-assembled CdSe/ZnSe quantum dots (QDs) and (Zn,Cd)Se/ZnSe quantum wells (QWs) are grown by molecular beam epitaxy. Low-temperature luminescence properties of these structures are investigated in detail including circular polarization-resolved magneto-photoluminescence and time-resolved spectroscopy. A significant spectral shift of excitonic emission from both kinds of low-dimensional structures is observed as a result of copper doping. It is found that the excitonic emission energy of copper-doped CdSe QDs may vary even by 200 meV, depending on the copper molar fraction. Apart from the excitonic emission, a characteristic optical transition related to the recombination of conduction-band electrons with holes strongly localized on copper ions is identified and it appears about 0.8 eV below the excitonic emission. Magneto-luminescence measurements reveal that circular polarization of this copper-related emission is significantly stronger than the circular polarization of the excitonic emission. Possible explanations of this effect are discussed including different g-factor values expected for spin-split sublevels, as well as charge-carrier dynamics present in these two optical transitions.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorKłopotowski, Łukasz
dc.contributor.authorWiater, Maciej
dc.contributor.authorChusnutdinow, Sergij
dc.contributor.authorWojnar, Piotr
dc.contributor.authorFronc, Krzysztof
dc.contributor.authorSzymura, Małgorzata
dc.contributor.authorKossut, Jacek
dc.contributor.authorKazimierczuk, Tomasz
dc.contributor.authorKossacki, Piotr
dc.contributor.authorRodek, Aleksander
dc.date.accessioned2024-01-24T20:48:12Z
dc.date.available2024-01-24T20:48:12Z
dc.date.issued2019
dc.description.financeNie dotyczy
dc.description.number32
dc.description.volume123
dc.identifier.doi10.1021/ACS.JPCC.9B04703
dc.identifier.issn1932-7447
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/103753
dc.identifier.weblinkhttps://pubs.acs.org/doi/pdf/10.1021/acs.jpcc.9b04703
dc.languageeng
dc.pbn.affiliationphysical sciences
dc.relation.ispartofJournal of Physical Chemistry C
dc.relation.pages19938-19944
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.titleCopper Doping of Low-Dimensional Se-Based Semiconductor Structures Grown by Molecular Beam Epitaxy
dc.typeJournalArticle
dspace.entity.typePublication