Exciton binding and excitonic transition energies in wurtzite Zn1-xCdxO/ZnO quantum wells

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dc.contributor.authorYildirim, Hasan
dc.date.accessioned2024-09-29T16:00:46Z
dc.date.available2024-09-29T16:00:46Z
dc.date.issued2018
dc.departmentKarabük Üniversitesien_US
dc.description.abstractBinding energy of the 1s exciton state in the Zn1-xCdxO/ZnO quantum wells, changing between 10 and 50 angstrom in width, has been calculated for x up to 0.2. The exciton wave function is represented in terms of hydrogenic wave functions and the effects of dielectric mismatch, exciton-phonon interactions and built-in electric field on the binding energy are considered. The calculated built-in electric field is around 19.6x MV cm(-1) in a 20-angstrom Zn1-xCdxO/ZnO quantum well. The numerical results indicate that the exciton binding energy stays below its bulk value virtually for all x because of the built-in electric field dominating the quantum confinement effect. The binding energy is nearly 26 meV at maximum, barely above its bulk value, and about 13 meV at minimum. The contribution of the dielectric mismatch is up to 40% while that of the exciton-phonon interactions is negligible. The exciton binding energy increases up to 66 meV, well above the bulk value, in case the built-in electric field is neglected. A qualitative agreement between the calculated excitonic transition energies and the low temperature and low excitation intensity photoluminescence peak data is obtained although some ZnCdO material properties, such as low temperature band gap, are not available.en_US
dc.identifier.doi10.1016/j.spmi.2018.05.045
dc.identifier.endpage352en_US
dc.identifier.issn0749-6036
dc.identifier.scopus2-s2.0-85048566379en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage344en_US
dc.identifier.urihttps://doi.org/10.1016/j.spmi.2018.05.045
dc.identifier.urihttps://hdl.handle.net/20.500.14619/5335
dc.identifier.volume120en_US
dc.identifier.wosWOS:000445713700042en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherAcademic Press Ltd- Elsevier Science Ltden_US
dc.relation.ispartofSuperlattices and Microstructuresen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectExciton binding energyen_US
dc.subjectQuantum wellen_US
dc.subjectZnCdOen_US
dc.subjectZnO2010en_US
dc.titleExciton binding and excitonic transition energies in wurtzite Zn1-xCdxO/ZnO quantum wellsen_US
dc.typeArticleen_US

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