Competition between charge transfer and energy transfer: Influence of intrinsic defects in ZnO nanocrystals on rhodamine-B dye color signals

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dc.authoridhttps://orcid.org/0000-0003-2807-0425
dc.authoridhttps://orcid.org/0000-0002-8319-1652
dc.authoridhttps://orcid.org/0000-0001-6723-1557
dc.authoridhttps://orcid.org/0000-0002-8395-0364
dc.authorscopusid36088420200
dc.authorscopusid58759448500
dc.authorscopusid55279469500
dc.authorscopusid57201500356
dc.authorscopusid36782175000
dc.authorscopusid14034884000
dc.authorscopusid57208597299
dc.authorscopusid7005316591
dc.authorwosidAAM-8078-2020
dc.authorwosidJJP-8503-2023
dc.authorwosidDMY-5375-2022
dc.authorwosidCNU-6203-2022
dc.authorwosidAAY-7541-2020
dc.authorwosidGKD-0339-2022
dc.authorwosidHZL-3347-2023
dc.authorwosidB-8052-2010
dc.contributor.authorAvsar, Seda Gürgen
dc.contributor.authorRepp, Sergej
dc.contributor.authorDietel, Lisa
dc.contributor.authorGüngör, Ahmet
dc.contributor.authorWeber, Stefan
dc.contributor.authorOcakoğlu, Kasım
dc.contributor.authorNadupalli, Shankari
dc.contributor.authorErdem, Emre
dc.date.accessioned2024-05-08T11:58:38Z
dc.date.available2024-05-08T11:58:38Z
dc.date.issued2023
dc.departmentFakülteler, Mühendislik Fakültesi, Mühendislik Temel Bilimleri Bölümü
dc.description.abstractThe complexity of the competition between nonradiative energy transfer and charge transfer is presented in this work. This study uses ZnO nanocrystals as a donor component and rhodamine B (RhB) dye as an acceptor component. Investigations reveal that the concentration of intrinsic defects and their localization, particularly oxygen vacancies, zinc interstitials, and oxygen interstitials, play a vital role in nonradiative energy transfer from ZnO nanocrystals to RhB dye. Additionally, photoluminescent spectra indicate that ZnO nanocrystals degrade the emission signals of RhB dye via charge transfer. It is possible that a part of oxygen vacancies may also contribute to the photocatalytic oxidation of the RhB molecule. The correlation between electron paramagnetic resonance, photoluminescence, and the RhB emission decay rates indicates two processes that one may encounter when dealing with semiconductor-dye conjugates. First is a complex energy transfer from ZnO to RhB indicating a photoluminescent up-conversion and second is a charge transfer from photoexcited intrinsic defect species in ZnO suppressing the RhB emission signals, which occur together. The defect species involved in photoluminescent up-conversion in ZnO+RhB is due to a nonradiative energy transfer from photoexcited zinc interstitials or doubly charged oxygen vacancies in ZnO to RhB. Additionally, the suppression of RhB emission occurs due to charge transfer from oxygen vacancies in ZnO
dc.identifier.citationAvsar, S. G., Repp, S., Dietel, L., Gungor, A., Weber, S., Ocakoglu, K., Nadupalli, S. ve Erdem, E. (2023). Competition between charge transfer and energy transfer: Influence of intrinsic defects in ZnO nanocrystals on rhodamine-B dye color signals, Physical Review B, 108 (24), DOI: 10.1103/PhysRevB.108.
dc.identifier.doi10.1103/PhysRevB.108.L241401
dc.identifier.issue24en_US
dc.identifier.otherL241401
dc.identifier.scopus2-s2.0-85179546467
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://link.aps.org/doi/10.1103/PhysRevB.108.L241401
dc.identifier.urihttps://hdl.handle.net/20.500.13099/229
dc.identifier.volume108en_US
dc.identifier.wosWOS:001144863200006
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorOcakoğlu, Kasım
dc.language.isoen
dc.publisherAmerican Physical Society
dc.relation.ispartofPhysical Review B
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectSONOPHOTOCATALYTIC DEGRADATION
dc.subjectPHOTOCATALYTIC DEGRADATION
dc.subjectFLUORESCENCE
dc.subjectNANOSTRUCTURES
dc.titleCompetition between charge transfer and energy transfer: Influence of intrinsic defects in ZnO nanocrystals on rhodamine-B dye color signals
dc.typeArticle

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