skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Measurement procedure for absolute broadband infrared up-conversion photoluminescent quantum yields: Correcting for absorption/re-emission

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.

Authors:
; ;  [1];  [1];  [2];  [3]
  1. School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS (United Kingdom)
  2. (IMT), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen (Germany)
  3. (LTI), Karlsruhe Institute of Technology, Engesserstrasse 13, Building 30.34, 76131 Karlsruhe (Germany)
Publication Date:
OSTI Identifier:
22308838
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 6; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ABSORPTION SPECTRA; BOUNDARY CONDITIONS; CALIBRATION; CONCENTRATION RATIO; EMISSION SPECTRA; INFRARED RADIATION; MEASURING METHODS; MONOCHROMATIC RADIATION; PHOTOLUMINESCENCE; QUANTUM EFFICIENCY; SOLAR ENERGY; WAVELENGTHS; YIELDS

Citation Formats

MacDougall, Sean K. W., Ivaturi, Aruna, Marques-Hueso, Jose, Richards, Bryce S., E-mail: bryce.richards@kit.edu, Institute of Microstructure Technology, and Light Technology Institute. Measurement procedure for absolute broadband infrared up-conversion photoluminescent quantum yields: Correcting for absorption/re-emission. United States: N. p., 2014. Web. doi:10.1063/1.4881537.
MacDougall, Sean K. W., Ivaturi, Aruna, Marques-Hueso, Jose, Richards, Bryce S., E-mail: bryce.richards@kit.edu, Institute of Microstructure Technology, & Light Technology Institute. Measurement procedure for absolute broadband infrared up-conversion photoluminescent quantum yields: Correcting for absorption/re-emission. United States. doi:10.1063/1.4881537.
MacDougall, Sean K. W., Ivaturi, Aruna, Marques-Hueso, Jose, Richards, Bryce S., E-mail: bryce.richards@kit.edu, Institute of Microstructure Technology, and Light Technology Institute. 2014. "Measurement procedure for absolute broadband infrared up-conversion photoluminescent quantum yields: Correcting for absorption/re-emission". United States. doi:10.1063/1.4881537.
@article{osti_22308838,
title = {Measurement procedure for absolute broadband infrared up-conversion photoluminescent quantum yields: Correcting for absorption/re-emission},
author = {MacDougall, Sean K. W. and Ivaturi, Aruna and Marques-Hueso, Jose and Richards, Bryce S., E-mail: bryce.richards@kit.edu and Institute of Microstructure Technology and Light Technology Institute},
abstractNote = {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.},
doi = {10.1063/1.4881537},
journal = {Review of Scientific Instruments},
number = 6,
volume = 85,
place = {United States},
year = 2014,
month = 6
}
  • A dual-channel low-noise heterodyne receiver is presented as part of a development effort to build a carbon dioxide laser-based Thomson scattering alpha particle diagnostic for a burning plasma experiment./aip/
  • Near infrared (NIR) quantum cutting involving the down conversion of an absorbed visible photon to emission of two NIR photons was achieved in SrAl{sub 2}O{sub 4}:0.01Eu{sup 2+}, xYb{sup 3+} (x=0, 1, 2, 5, 10, 20, 30 mol%) samples. The photoluminescence properties of samples in visible and NIR regions were measured to verify the energy transfer (ET) from Eu{sup 2+} to Yb{sup 3+}. The results demonstrated that Eu{sup 2+} was an efficient sensitizer for Yb{sup 3+} in the SrAl{sub 2}O{sub 4} host lattice. According to Gaussian fitting analysis and temperature-dependent luminescence experiments, the conclusion was drawn that the cooperative energy transfermore » (CET) process dominated the ET process and the influence of charge transfer state (CTS) of Yb{sup 3+} could be negligible. As a result, the high energy transfer efficiency (ETE) and quantum yield (QY) have been acquired, the maximum value approached 73.68% and 147.36%, respectively. Therefore, this down-conversion material has potential application in crystalline silicon solar cells to improve conversion efficiency. - Graphical abstract: Near infrared quantum cutting was achieved in Eu{sup 2+}–Yb{sup 3+} co-doped SrAl{sub 2}O{sub 4} samples. The cooperative energy transfer process dominated energy transfer process and high energy transfer efficiency was acquired. - Highlights: • The absorption spectrum of Eu{sup 2+} ion is strong in intensity and broad in bandwidth. • The spectra of Eu{sup 2+} in SrAl{sub 2}O{sub 4} lies in the strongest region of solar spectrum. • The cooperative energy transfer (CET) dominated the energy transfer process. • The domination of CET is confirmed by experimental analysis. • SrAl{sub 2}O{sub 4}:Eu{sup 2+},Yb{sup 3+} show high energy transfer efficiency and long lifetime.« less
  • The composition of photoluminescent films containing low-dimensional silicon and germanium is studied. Si, Ge, and Al oxide films containing Si and Ge quantum dots are produced by pulsed laser ablation. The infrared transmittance spectra in the range of wave numbers from 650 to 1400 cm{sup -1} and the time-resolved photoluminescence spectra in the energy range from 1.4 to 3.2 eV at room temperature are recorded. Correlations between the conditions of formation of the films, their photoluminescence properties, and the stretching vibrations of Si-O-Si, Ge-O-Ge, and Al-O bonds are established.
  • In this paper, we consider a simplified error-correcting problem: for a fixed encoding process, to find a cascade connected quantum channel such that the worst fidelity between the input and the output becomes maximum. With the use of the one-to-one parametrization of quantum channels, a procedure finding a suboptimal error-correcting channel based on a semidefinite programming is proposed. The effectiveness of our method is verified by an example of the bit-flip channel decoding.
  • After a consideration of the strict theory of the arrangement known as the live-time integrator, it is shown how this may be applied to coincidence measurements in order to ascertain the various counting losses due to the dead times of the two channels, whatever the nature of the dead times. It is also shown for two particular cases that the proposed method also allows corrections to be made for instrumental coincidences. An experimental study enabled deductions drawn from theory to be confirmed in the case of non-cumulative dead times. (auth)