Algorithm for Building a Spectrum for NREL's One-Sun Multi-Source Simulator

Tom Moriarty, Joe Jablonski, Keith Emery

Research output: Contribution to conferencePaperpeer-review

38 Scopus Citations


Historically, the tools used at NREL to compensate for the difference between a reference spectrum and a simulator spectrum have been well-matched reference cells and the application of a calculated spectral mismatch correction factor, M. This paper describes the algorithm for adjusting the spectrum of a 9-channel fiber-optic-based solar simulator with a uniform beam size of 9 cm square at 1-sun. The combination of this algorithm and the One-Sun Multi-Source Simulator (OSMSS) hardware reduces NREL's current vs. voltage measurement time for a typical three-junction device from man-days to man-minutes. These time savings may be significantly greater for devices with more junctions.

Original languageAmerican English
Number of pages5
StatePublished - 2012
Event38th IEEE Photovoltaic Specialists Conference, PVSC 2012 - Austin, TX, United States
Duration: 3 Jun 20128 Jun 2012


Conference38th IEEE Photovoltaic Specialists Conference, PVSC 2012
Country/TerritoryUnited States
CityAustin, TX

Bibliographical note

See CP-5200-54134 for preprint

NREL Publication Number

  • NREL/CP-5200-56956


  • calibration
  • multijunction
  • multisource simulator
  • solar simulation
  • spectral mismatch


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