Robust Measurement of Thin-Film Photovoltaic Modules Exhibiting Light-Induced Transients: Preprint

Research output: Contribution to conferencePaper


Light-induced changes to the current-voltage characteristic of thin-film photovoltaic modules (i.e. light-soaking effects) frustrate the repeatable measurement of their operating power. We describe best practices for mitigating, or stabilizing, light-soaking effects for both CdTe and CIGS modules to enable robust, repeatable, and relevant power measurements. We motivate the practices by detailing how modules react to changes in different stabilization methods. We also describe and demonstrate a method for validating alternative stabilization procedures, such as those relying on forward bias in the dark. Reliable measurements of module power are critical for qualification testing, reliability testing, and power rating.
Original languageAmerican English
Number of pages10
StatePublished - 2015
EventSPIE Optics+Photonics 2015 - San Diego, California
Duration: 9 Aug 201513 Aug 2015


ConferenceSPIE Optics+Photonics 2015
CitySan Diego, California

NREL Publication Number

  • NREL/CP-5J00-64769


  • metastability
  • photovoltaic
  • solar
  • testing
  • thin films
  • transient


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