Abstract
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 language | American English |
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Number of pages | 5 |
State | Published - 1998 |
Event | 2nd World Conference on Photovoltaic Solar Energy Conversion - Vienna, Austria Duration: 6 Jul 1998 → 10 Jul 1998 |
Conference
Conference | 2nd World Conference on Photovoltaic Solar Energy Conversion |
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City | Vienna, Austria |
Period | 6/07/98 → 10/07/98 |
NREL Publication Number
- NREL/CP-530-23878