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  4. Measurement Uncertainties in I-V Calibration of Multi-Junction Solar Cells for Different Solar Simulators and Reference Devices
 
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2020
Journal Article
Title

Measurement Uncertainties in I-V Calibration of Multi-Junction Solar Cells for Different Solar Simulators and Reference Devices

Abstract
Different types of dual-junction solar cells (perovskite/silicon and GaInP/(Al)GaAs) are used in an investigation of measurement uncertainty for electrical characterization of multi-junction solar cells. A method traceable to international reference standards is presented. The spectral mismatch factor matrix is introduced and used with a Monte-Carlo method including manifold correlated and uncorrelated uncertainties. In this way, a detailed analysis of the solar simulator's spectral irradiance and its influence on uncertainty becomes possible. The use of subcell-adapted and broadband reference solar cells is addressed regarding their impact on uncertainty. This allows for finding optimal conditions for calibration with lowest measurement uncertainty. The short-circuit current of a series connected multi-junction solar cell is affected by luminescence coupling and other effects. With an experimental method it is shown how the uncertainty of the device short-circuit current can be precisely determined. The spectrometric characterization method allows deriving uncertainties of all I-V parameters. In this way a complete evaluation of measurement uncertainty for the calibration of multi-junction solar cells at standard testing conditions is introduced. This article is an extension to our work presented at the 46th IEEE PVSC. Here, we have added a detailed analysis of the influence of different solar simulator spectral irradiance distributions on measurement uncertainty by evaluating a Monte Carlo simulation introducing correlation coefficients. In addition for the first time, it is shown how luminescent coupling influences the calibration of multi-junction solar cells and how the effect needs to be implemented into the uncertainty of measurement for the short-circuit current as well as efficiency.
Author(s)
Reichmuth, Kasimir S.
Siefer, Gerald  
Schachtner, Michael  
Mühleis, Matthias
Hohl-Ebinger, Jochen  
Glunz, Stefan W.  
Journal
IEEE Journal of Photovoltaics  
Open Access
DOI
10.1109/jphotov.2020.2989144
File(s)
N-593400.pdf (2.44 MB)
Rights
CC BY 4.0: Creative Commons Attribution
Language
English
Fraunhofer-Institut für Solare Energiesysteme ISE  
Keyword(s)
  • Photovoltaik

  • Silicium-Photovoltaik

  • III-V und Konzentrator-Photovoltaik

  • Neuartige Photovoltaik-Technologien

  • Akkreditierte Labors

  • Charakterisierung von Prozess- und Silicium-Materialien

  • III-V Epitaxie und Solarzellen

  • Tandemsolarzellen auf kristallinem Silicium

  • CalLab PV Cells

  • calibration

  • III-V semiconductor materials

  • measurement uncertainty

  • Monte Carlo method

  • multi-junction

  • Perovskite semiconductor materials

  • photovoltaic cells

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