NaYF4:Yb,Er/NaYF4 Core/Shell Nanocrystals with High Upconversion Luminescence Quantum Yield
DC Element | Wert | Sprache |
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dc.contributor.author | Homann, Christian | |
dc.contributor.author | Krukewitt, Lisa | |
dc.contributor.author | Frenzel, Florian | |
dc.contributor.author | Grauel, Bettina | |
dc.contributor.author | Wuerth, Christian | |
dc.contributor.author | Resch-Genger, Ute | |
dc.contributor.author | Haase, Markus | |
dc.date.accessioned | 2021-12-23T16:07:04Z | - |
dc.date.available | 2021-12-23T16:07:04Z | - |
dc.date.issued | 2018 | |
dc.identifier.issn | 14337851 | |
dc.identifier.uri | https://osnascholar.ub.uni-osnabrueck.de/handle/unios/7698 | - |
dc.description.abstract | Upconversion core/shell nanocrystals with different mean sizes ranging from 15 to 45nm were prepared via a modified synthesis procedure based on anhydrous rare-earth acetates. All particles consist of a core of NaYF4:Yb,Er, doped with 18% Yb3+ and 2% Er3+, and an inert shell of NaYF4, with the shell thickness being equal to the radius of the core particle. Absolute measurements of the photoluminescence quantum yield at a series of different excitation power densities show that the quantum yield of 45nm core/shell particles is already very close to the quantum yield of microcrystalline upconversion phosphor powder. Smaller core/shell particles prepared by the same method show only a moderate decrease in quantum yield. The quantum yield of 15nm core/shell particles, for instance, is reduced by a factor of three compared to the bulk upconversion phosphor at high power densities (100Wcm(-2)) and by approximately a factor of 10 at low power densities (1Wcm(-2)). | |
dc.description.sponsorship | German Science Foundation DFGGerman Research Foundation (DFG) [RE 1203/18-1, HA 1649/7-1]; EUEuropean Commission [COST 1403]; We thank the German Science Foundation DFG (grants RE 1203/18-1 and HA 1649/7-1) and the EU (COST 1403) for financial support. | |
dc.language.iso | en | |
dc.publisher | WILEY-V C H VERLAG GMBH | |
dc.relation.ispartof | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | |
dc.subject | CANCER-THERAPY | |
dc.subject | Chemistry | |
dc.subject | Chemistry, Multidisciplinary | |
dc.subject | CORE | |
dc.subject | DOPED NANOPARTICLES | |
dc.subject | luminescence | |
dc.subject | nanocrystals | |
dc.subject | NANOMATERIALS | |
dc.subject | NANOSTRUCTURES | |
dc.subject | NaYF4 | |
dc.subject | OPTICAL-PROPERTIES | |
dc.subject | PARTICLE-SIZE DISTRIBUTION | |
dc.subject | quantum yield | |
dc.subject | SHELL NANOPARTICLES | |
dc.subject | SURFACE MODIFICATION | |
dc.subject | upconversion | |
dc.subject | UPCONVERTING NANOPARTICLES | |
dc.title | NaYF4:Yb,Er/NaYF4 Core/Shell Nanocrystals with High Upconversion Luminescence Quantum Yield | |
dc.type | journal article | |
dc.identifier.doi | 10.1002/anie.201803083 | |
dc.identifier.isi | ISI:000437668700074 | |
dc.description.volume | 57 | |
dc.description.issue | 28 | |
dc.description.startpage | 8765 | |
dc.description.endpage | 8769 | |
dc.contributor.orcid | 0000-0002-0204-9727 | |
dc.contributor.orcid | 0000-0002-0944-1115 | |
dc.contributor.researcherid | A-9736-2013 | |
dc.contributor.researcherid | B-8369-2009 | |
dc.identifier.eissn | 15213773 | |
dc.publisher.place | POSTFACH 101161, 69451 WEINHEIM, GERMANY | |
dcterms.isPartOf.abbreviation | Angew. Chem.-Int. Edit. | |
crisitem.author.dept | Institut für Chemie neuer Materialien | - |
crisitem.author.deptid | institute11 | - |
crisitem.author.orcid | 0000-0002-9686-8810 | - |
crisitem.author.parentorg | FB 05 - Biologie/Chemie | - |
crisitem.author.grandparentorg | Universität Osnabrück | - |
crisitem.author.netid | HaMa954 | - |
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geprüft am 07.06.2024