Measurement procedure for absolute broadband infrared up-conversion photoluminescent quantum yields

correcting for absorption/re-emission

Sean K. W. Macdougall, Aruna Ivaturi, Jose Marques-Hueso, Bryce S. Richards

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The internal photoluminescent quantum yield (iPLQY) - defined as the ratio of emitted photons to those absorbed - is an important parameter in the evaluation and application of luminescent materials. The iPLQY is rarely reported due to the complexities in the calibration of such a measurement. Herein, an experimental method is proposed to correct for re-emission, which leads to an underestimation of the absorption under broadband excitation. Although traditionally the iPLQY is measured using monochromatic sources for linear materials, this advancement is necessary for nonlinear materials with wavelength dependent iPLQY, such as the application of up-conversion to solar energy harvesting. The method requires an additional measurement of the emission line shape that overlaps with the excitation and absorption spectra. Through scaling of the emission spectrum, at the long wavelength edge where an overlap of excitation does not occur, it is possible to better estimate the value of iPLQY. The method has been evaluated for a range of nonlinear material concentrations and under various irradiances to analyze the necessity and boundary conditions that favor the proposed method. Use of this refined method is important for a reliable measurement of iPLQY under a broad illumination source such as the Sun.

Original languageEnglish
Article number063109
Number of pages9
JournalReview of Scientific Instruments
Volume85
Issue number6
DOIs
Publication statusPublished - 10 Jun 2014

Fingerprint

Quantum yield
broadband
Infrared radiation
excitation
Wavelength
Energy harvesting
solar energy
irradiance
wavelengths
Solar energy
line shape
Light sources
Absorption spectra
emission spectra
Photons
Lighting
illumination
Boundary conditions
Calibration
boundary conditions

Keywords

  • photons
  • absorption sphere
  • emission spectra
  • irradiance
  • integrating spheres

Cite this

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Measurement procedure for absolute broadband infrared up-conversion photoluminescent quantum yields : correcting for absorption/re-emission. / Macdougall, Sean K. W.; Ivaturi, Aruna; Marques-Hueso, Jose; Richards, Bryce S.

In: Review of Scientific Instruments, Vol. 85, No. 6, 063109, 10.06.2014.

Research output: Contribution to journalArticle

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