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2015
Conference Paper
Titel
Analysis of the output of two isotype cell sets compared to a precicion spectroradiometer
Abstract
Isotype cells can be used to obtain coarse measurements of the solar spectrum relevant for multi-junction photovoltaic outdoor performance characterization. However, the present literature lacks detailed comparisons between these sensors and high quality spectroradiometer systems. A measurement campaign has been performed over several days where the outputs of two different isotype sensor sets are compared against the output of an OL750 spectroradiometer. The current generation of each isotype cell has been calculated using its measured spectral response and the spectrum measured by the OL750. The current generation ratios between the different junctions are then calculated, and compared with the measured isotype outputs. The results show a consistent relationship between both sets of isotype cells and the spectroradiometer, with a standard deviation between values of less than 1%. These results support the use of isotype sensors for obtaining broadband spectral measurements of the solar spectrum