Publication:
Synthesis of upconverting nanosheets derived from Er-Yb and Tm-Yb Co-doped layered perovskites and their layer-by-layer assembled films

dc.contributor.coauthorGunay, Bensu
dc.contributor.coauthorSuer, Ozge
dc.contributor.coauthorDoger, Hilal
dc.contributor.coauthorArslan, Ozlem
dc.contributor.coauthorSaglam, Ozge
dc.contributor.departmentDepartment of Chemistry
dc.contributor.kuauthorÜnal, Uğur
dc.contributor.kuprofileFaculty Member
dc.contributor.yokid42079
dc.date.accessioned2024-11-10T00:11:29Z
dc.date.issued2022
dc.description.abstractHere, we investigated the structure and upconversion (UC) properties of new-type of single oxide nanosheets, derived from the Er3+/Yb3+ and Tm3+/Yb3+ co-doped Ruddlesden-Popper type layered perovskites, and their layer-by-layer (LBL) self-assembled nanofilms. The single oxide nanosheets, obtained by exfoliation of the proton-exchanged K2La2Ti3O10, had the thickness in the range of 2-3 nm indicating good consistency with the theoretical thickness and lateral size from 500 nm up to 2 mu m. Er3+/Yb3+, Tm3+/Yb3+ and Tm3+/Er3+co-doped nanosheets were used as building blocks of the multilayer films deposited by layer-by-layer procedure. The LBL films composed of 2.5 % Er3+ + 5 % Yb3+, 2.5 % Tm3+ + 20 % Yb3+, 2.5 % Tm3+ + 20 % Er3+ after 60 sequences have shown a white emission confirmed by the CIE chromaticity diagram. The possible UC energy transfer of LBL films fabricated after 30 sequences using the nanosheets derived from the 2.5 % Er3+ + 5 % Yb3+ co-doped layered perovskites was also suggested. The number of photons participating in the UC process was confirmed as two-photon for both green and red UC emissions due to the F-4(9/2) -> I-4(15/2) and H-2(11/2), S-4(3/2) -> I-4(15/2) transitions, respectively.
dc.description.indexedbyWoS
dc.description.indexedbyScopus
dc.description.openaccessNO
dc.description.sponsorshipScientific and Technological Research Council of Turkey [117M512]
dc.description.sponsorshipKoc University Surface Science and Technology Center (KUYTAM) This work was supported by The Scientific and Technological Research Council of Turkey [Grant number 117M512]. The authors would like to thank Koc University Surface Science and Technology Center (KUYTAM).
dc.description.volume649
dc.identifier.doi10.1016/j.colsurfa.2022.129502
dc.identifier.eissn1873-4359
dc.identifier.issn0927-7757
dc.identifier.scopus2-s2.0-85132698828
dc.identifier.urihttp://dx.doi.org/10.1016/j.colsurfa.2022.129502
dc.identifier.urihttps://hdl.handle.net/20.500.14288/17471
dc.identifier.wos818746800005
dc.keywordsLayer-by-layer self-assembly
dc.keywordsTwo-dimensional materials
dc.keywordsSingle oxide nanosheets
dc.keywordsLayered perovskites
dc.keywordsUpconversion properties
dc.languageEnglish
dc.publisherElsevier
dc.sourceColloids And Surfaces A-Physicochemical And Engineering Aspects
dc.subjectChemistry, physical and theoretical
dc.titleSynthesis of upconverting nanosheets derived from Er-Yb and Tm-Yb Co-doped layered perovskites and their layer-by-layer assembled films
dc.typeJournal Article
dspace.entity.typePublication
local.contributor.authorid0000-0003-4718-1243
local.contributor.kuauthorÜnal, Uğur
local.publication.orgunit1College of Sciences
local.publication.orgunit2Department of Chemistry
local.publication.orgunit2KUYTAM (Koç University Surface Science and Technology Center)
relation.isOrgUnitOfPublication035d8150-86c9-4107-af16-a6f0a4d538eb
relation.isOrgUnitOfPublication.latestForDiscovery035d8150-86c9-4107-af16-a6f0a4d538eb

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