Method for the diagnostic evaluation of thin-film solar modules based on I–V measurement using a line light source

We propose a technique for detecting unevenness and abnormalities in the active area of a thin-film solar module based on measurement of its I–V characteristics using a line light. The outline of this technique and the results of an evaluation experiment are described. This method can be applied to the evaluation of the moduleʹs performance and to the detection of defects.