Zitieren Sie bitte immer diesen URN: urn:nbn:de:kobv:b43-325240
Quantification of anisotropy-related uncertainties in relative photoluminescence quantum yield measurements of nanomaterials - semiconductor quantum dots and rods
- In order to assess the anisotropy-related uncertainties of relatively determined photoluminescence quantum yields (ΦPL) of molecular emitters and luminescent nanomaterials, we compared ΦPL values measured without and with polarizers using magic angle conditions and studied systematically the dependence of the detected emission intensity on the polarizer settings for samples of varying anisotropy. This includes a dispersion of a spherical quantum dot (QD) with an ideally isotropic emission, a solution of a common small organic dye in a fluid solvent as well as dispersions of elongated quantum dot rods (QDR) with an anisotropic luminescence and a small organic dye in a rigid polymeric matrix, as ideally anisotropic emitter. Our results show that for instruments lacking polarizers, anisotropy-related measurement uncertainties of relative photoluminescence quantum yields can amount to more than 40%, with the size of these systematic errors depending on the difference in emission anisotropyIn order to assess the anisotropy-related uncertainties of relatively determined photoluminescence quantum yields (ΦPL) of molecular emitters and luminescent nanomaterials, we compared ΦPL values measured without and with polarizers using magic angle conditions and studied systematically the dependence of the detected emission intensity on the polarizer settings for samples of varying anisotropy. This includes a dispersion of a spherical quantum dot (QD) with an ideally isotropic emission, a solution of a common small organic dye in a fluid solvent as well as dispersions of elongated quantum dot rods (QDR) with an anisotropic luminescence and a small organic dye in a rigid polymeric matrix, as ideally anisotropic emitter. Our results show that for instruments lacking polarizers, anisotropy-related measurement uncertainties of relative photoluminescence quantum yields can amount to more than 40%, with the size of these systematic errors depending on the difference in emission anisotropy between the sample and the standard.…
Autor*innen: | Christian WürthORCiD, Daniel GeißlerORCiD, Ute Resch-GengerORCiD |
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Dokumenttyp: | Zeitschriftenartikel |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | Zeitschrift für physikalische Chemie |
Jahr der Erstveröffentlichung: | 2015 |
Veröffentlichende Institution: | Bundesanstalt für Materialforschung und -prüfung (BAM) |
Verlag: | Oldenbourg |
Verlagsort: | München |
Jahrgang/Band: | 229 |
Ausgabe/Heft: | 1-2 |
Erste Seite: | 153 |
Letzte Seite: | 165 |
Freie Schlagwörter: | Dye; Emission Anisotropy; Photoluminescence; Quantum Dot; Quantum Dot Rod; Quantum Yield |
DOI: | 10.1515/zpch-2014-0626 |
URN: | urn:nbn:de:kobv:b43-325240 |
ISSN: | 0942-9352 |
ISSN: | 2196-7156 |
ISSN: | 0044-3336 |
ISSN: | 0044-3328 |
Verfügbarkeit des Dokuments: | Datei für die Öffentlichkeit verfügbar ("Open Access") |
Lizenz (Deutsch): | Creative Commons - Namensnennung-Nicht kommerziell-Keine Bearbeitung |
Datum der Freischaltung: | 20.02.2016 |
Referierte Publikation: | Ja |
Datum der Eintragung als referierte Publikation: | 03.05.2018 |
Schriftenreihen ohne Nummerierung: | Wissenschaftliche Artikel der BAM |