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Versatile Implied Open-Circuit Voltage Imaging Method and its Application in Monolithic Tandem Solar Cells
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  • Oliver Fischer,
  • Anh Dinh Bui,
  • Florian Schindler,
  • Daniel Macdonald,
  • Stefan Glunz,
  • Hieu Nguyen,
  • Martin Schubert
Oliver Fischer
Fraunhofer-Institut fur Solare Energiesysteme ISE

Corresponding Author:oliver.fischer@ise.fraunhofer.de

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Anh Dinh Bui
Australian National University School of Engineering
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Florian Schindler
Fraunhofer-Institut fur Solare Energiesysteme ISE
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Daniel Macdonald
Australian National University School of Engineering
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Stefan Glunz
Fraunhofer-Institut fur Solare Energiesysteme ISE
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Hieu Nguyen
Australian National University School of Engineering
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Martin Schubert
Fraunhofer-Institut fur Solare Energiesysteme ISE
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Abstract

As the efficiency of perovskite silicon tandem solar cells is increasing, the upscaling for industrial production is coming into focus. Spatially resolved, quantitative, fast, and reliable contactless measurement techniques are demanded for quality assurance and to pinpoint the cause of performance losses in perovskite silicon tandem solar cells. In this publication we present a measurement method based on spectrally integrated photoluminescence (PL) imaging to extract subcell-selective implied open-circuit ( i V oc ) images from monolithic perovskite silicon tandem solar cells. We validate the approach using spectrally resolved absolute PL measurements based on an integrating sphere for the perovskite top cell and PL-calibrated carrier lifetime images for the silicon bottom cell. Additionally, V oc measurements of solar cells with low contact losses are used to validate the new measurement technique. We find a good agreement of the i V oc images with the validating measurements with a maximum deviation of well below 1 % compared to the validation measurements.
02 Aug 2023Submitted to Progress in Photovoltaics
02 Aug 2023Review(s) Completed, Editorial Evaluation Pending
02 Aug 2023Submission Checks Completed
02 Aug 2023Assigned to Editor
22 Aug 2023Reviewer(s) Assigned
18 Sep 2023Editorial Decision: Revise Minor
24 Oct 20231st Revision Received
24 Oct 2023Submission Checks Completed
24 Oct 2023Assigned to Editor
24 Oct 2023Review(s) Completed, Editorial Evaluation Pending
27 Oct 2023Editorial Decision: Accept