For the precise calibration of modules, especially for thin film and new materials, the measurement precision can be improved if the spectral Response of the module or ist cells are known. With this informatiion, a spectral mismatch correction can be done on the measurement results.


For measurement of the Spectral Response of modules, several methods can be applied:


1) Measurement of a sinngle cell of a module. This can easily be done if the cell has separate contacts. Otherwise, using a sophisticated light biasing scheme, a singl cell can be isolated from the measurement Signal of the full module.


2) Full area illumnation of the module with monochromatic light. This can be done with a filter Setup for the moduletester, which is available as an Option for the laboratory Systems.


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