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Luminescent Nanoparticles – From Photophysics to the Measurement of Photoluminescence Quantum Yields

  • Inorganic nanocrystals with linear and nonlinear photoluminescence in the ultraviolet, visible, near infrared and short-wave infrared like spectrally shifting lanthanide-based nanoparticles (LnNCs) like NaYF4: Yb, Er and semiconductor quantum dots have meanwhile found applications in the life and material sciences ranging from optical reporters for bioimaging and sensing over security barcodes to solid state lighting and photovoltaics. The identification of optimum particle architectures for photonic applications requires quantitative spectroscopic studies, ideally flanked by single particle studies to assess spectroscopic inhomogeneities on a particle-to-particle level for typical preparation methods. In the following, photoluminescence studies of LnNCs are presented, addressing parameters such as particle size, surface coating, and dopant ion concentration as well as excitation power density mandatory for a profound mechanistic understanding of the nonradiative deactivation pathwaysInorganic nanocrystals with linear and nonlinear photoluminescence in the ultraviolet, visible, near infrared and short-wave infrared like spectrally shifting lanthanide-based nanoparticles (LnNCs) like NaYF4: Yb, Er and semiconductor quantum dots have meanwhile found applications in the life and material sciences ranging from optical reporters for bioimaging and sensing over security barcodes to solid state lighting and photovoltaics. The identification of optimum particle architectures for photonic applications requires quantitative spectroscopic studies, ideally flanked by single particle studies to assess spectroscopic inhomogeneities on a particle-to-particle level for typical preparation methods. In the following, photoluminescence studies of LnNCs are presented, addressing parameters such as particle size, surface coating, and dopant ion concentration as well as excitation power density mandatory for a profound mechanistic understanding of the nonradiative deactivation pathways in these nanocrystals. In addition, methods for the determination of particle brightness and photoluminescence quantum yield in different spectral windows are presented.zeige mehrzeige weniger

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  • Luminescent Nanoparticles_Lecture Hannover_2206_2023.pdf
    eng
  • Luminiscent Nanoparticles_Lecture Hannover_presentation.pdf
    eng

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Metadaten
Autor*innen:Ute Resch-GengerORCiD, Karl-David Wegner
Koautor*innen:Florian Weigert, Florian Frenzel, Elina Andresen, Christian Würth
Dokumenttyp:Vortrag
Veröffentlichungsform:Präsentation
Sprache:Englisch
Jahr der Erstveröffentlichung:2023
Organisationseinheit der BAM:1 Analytische Chemie; Referenzmaterialien
1 Analytische Chemie; Referenzmaterialien / 1.2 Biophotonik
DDC-Klassifikation:Naturwissenschaften und Mathematik / Chemie / Analytische Chemie
Freie Schlagwörter:Lifetime; Luminescence; Nano; Particle; Photophysics; Quality assurance; Quantification; Quantitative spectroscopy; Quantum yield; Reference material; Semiconductor quantum dot; Standard; Surface analysis; Upconversation nanocrystal
Themenfelder/Aktivitätsfelder der BAM:Chemie und Prozesstechnik
Umwelt
Umwelt / Sensorik
Veranstaltung:Phoenix Colloquium
Veranstaltungsort:Hannover, Germany
Beginndatum der Veranstaltung:22.06.2023
Enddatum der Veranstaltung:22.06.2023
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:29.06.2023
Referierte Publikation:Nein
Eingeladener Vortrag:Nein
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