Photovoltaic Spectral Responsivity Measurements

Research output: Contribution to conferencePaper


This paper discusses the various elemental random and nonrandom error sources in typical spectral responsivity measurement systems. We focus specifically on the filter and grating monochrometer-based spectral responsivity measurement systems used by the Photovoltaic (PV) performance characterization team at NREL. A variety of subtle measurement errors can occur that arise from a finitephoto-current response time, bandwidth of the mono-chromatic light, waveform of the monochromatic light, and spatial uniformity of the monochromatic and bias lights; the errors depend on the light source, PV technology, and measurement system. The quantum efficiency can be a function of the voltage bias, light bias level, and, for some structures, the spectral content of the bias light orlocation on the PV device. This paper compares the advantages and problems associated with semiconductor-detector-based calibrations and pyroelectric-detector-based calibrations. Different current-to-voltage conversion and ac photo-current detection strategies employed at NREL are compared and contrasted.
Original languageAmerican English
Number of pages5
StatePublished - 1998
Event2nd World Conference on Photovoltaic Solar Energy Conversion - Vienna, Austria
Duration: 6 Jul 199810 Jul 1998


Conference2nd World Conference on Photovoltaic Solar Energy Conversion
CityVienna, Austria

NREL Publication Number

  • NREL/CP-530-23878


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