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Preventing cation intermixing enables 50% quantum yield in sub-15 nm short-wave infrared-emitting rare-earth based core-shell nanocrystals

Arteaga Cardona, Fernando 1; Jain, Noopur; Popescu, Radian 2; Busko, Dmitry 1; Madirov, Eduard ORCID iD icon 1; Arús, Bernardo A.; Gerthsen, Dagmar 2; De Backer, Annick; Bals, Sara; Bruns, Oliver T.; Chmyrov, Andriy; Van Aert, Sandra; Richards, Bryce S. ORCID iD icon 1,3; Hudry, Damien 1
1 Institut für Mikrostrukturtechnik (IMT), Karlsruher Institut für Technologie (KIT)
2 Laboratorium für Elektronenmikroskopie (LEM), Karlsruher Institut für Technologie (KIT)
3 Lichttechnisches Institut (LTI), Karlsruher Institut für Technologie (KIT)


Short-wave infrared (SWIR) fluorescence could become the new gold standard in optical imaging for biomedical applications due to important advantages such as lack of autofluorescence, weak photon absorption by blood and tissues, and reduced photon scattering coefficient. Therefore, contrary to the visible and NIR regions, tissues become translucent in the SWIR region. Nevertheless, the lack of bright and biocompatible probes is a key challenge that must be overcome to unlock the full potential of SWIR fluorescence. Although rare-earth-based core-shell nanocrystals appeared as promising SWIR probes, they suffer from limited photoluminescence quantum yield (PLQY). The lack of control over the atomic scale organization of such complex materials is one of the main barriers limiting their optical performance. Here, the growth of either homogeneous (α-NaYF$_4$) or heterogeneous (CaF$_2$) shell domains on optically-active α-NaYF$_4$:Yb:Er (with and without Ce$^{3+}$ co-doping) core nanocrystals is reported. The atomic scale organization can be controlled by preventing cation intermixing only in heterogeneous core-shell nanocrystals with a dramatic impact on the PLQY. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000161430
Veröffentlicht am 15.08.2023
DOI: 10.1038/s41467-023-40031-4
Zitationen: 7
Web of Science
Zitationen: 4
Zitationen: 8
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mikrostrukturtechnik (IMT)
Laboratorium für Elektronenmikroskopie (LEM)
Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 2041-1723
KITopen-ID: 1000161430
HGF-Programm 38.01.05 (POF IV, LK 01) Simulations, Theory, Optics and Analytics (STOA)
Erschienen in Nature Communications
Verlag Nature Research
Band 14
Seiten Art.-Nr.: 4462
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 25.07.2023
Schlagwörter Imaging techniques and agents, Nanoparticles, Optical materials, Structural properties
Nachgewiesen in Scopus
Web of Science
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