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Zeitschrift für Physikalische Chemie

International journal of research in physical chemistry and chemical physics

Ed. by Rademann, Klaus

12 Issues per year


IMPACT FACTOR 2016: 1.012

CiteScore 2016: 0.99

SCImago Journal Rank (SJR) 2015: 0.491
Source Normalized Impact per Paper (SNIP) 2015: 0.520

Online
ISSN
2196-7156
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Volume 229, Issue 1-2 (Feb 2015)

Issues

Quantification of Anisotropy-Related Uncertainties in Relative Photoluminescence Quantum Yield Measurements of Nanomaterials – Semiconductor Quantum Dots and Rods

Christian Würth
  • Corresponding author
  • BAM – Federal Institute for Materials Research and Testing, Division 1.10 Biophotonics, Richard-Willstätter-Str. 11, 12489 Berlin, Germany
  • Email:
/ Daniel Geißler
  • BAM – Federal Institute for Materials Research and Testing, Division 1.10 Biophotonics, Richard-Willstätter-Str. 11, 12489 Berlin, Germany
/ Ute Resch-Genger
  • Corresponding author
  • BAM – Federal Institute for Materials Research and Testing, Division 1.10 Biophotonics, Richard-Willstätter-Str. 11, 12489 Berlin, Germany
  • Email:
Published Online: 2014-11-11 | DOI: https://doi.org/10.1515/zpch-2014-0626

Abstract

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 anisotropy between the sample and the standard.

Keywords: Photoluminescence; Quantum Yield; Emission Anisotropy; Quantum Dot Rod; Quantum Dot; Dye

About the article

Accepted: 2014-10-06

Received: 2014-09-24

Published Online: 2014-11-11

Published in Print: 2015-02-28



Citation Information: Zeitschrift für Physikalische Chemie, ISSN (Online) 2196-7156, ISSN (Print) 0942-9352, DOI: https://doi.org/10.1515/zpch-2014-0626. Export Citation

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