Title :
Influence of non-uniform illumination on spectral response and efficiency measurements of large area solar cells
Author :
Schönecker, Axel ; Bücher, Klaus
Author_Institution :
Fraunhofer-Inst. fur Solare Energiesysteme, Freiburg, Germany
Abstract :
An estimation of the uncertainty due to nonuniform or partial illumination for different types of solar cells is given, and the necessity to guarantee the uniformity of the irradiation for precision measurements and calibration is shown. In addition, the uncertainty in the mismatch factor is calculated as an example of the influence of spectral response uncertainty to integral values. The effects resulting from inhomogeneity of spectral response under nonuniform monochromatic irradiation are determined by measuring the spatial distribution of the irradiation and the spatially resolved spectral response. In addition, a model will be used to extract the influence of extreme cases of nonuniformity on different kinds of solar cells
Keywords :
solar cells; calibration; efficiency measurements; large area solar cells; mismatch factor; nonuniform illumination; nonuniform monochromatic irradiation; partial illumination; spectral response measurements; Area measurement; Current measurement; Energy measurement; Equations; Light sources; Lighting; Measurement standards; Monitoring; Photoconductivity; Photovoltaic cells;
Conference_Titel :
Photovoltaic Specialists Conference, 1991., Conference Record of the Twenty Second IEEE
Conference_Location :
Las Vegas, NV
Print_ISBN :
0-87942-636-5
DOI :
10.1109/PVSC.1991.169209
