System for an automatic analysis of defective Solar cells in the Solar Module

This paper deals with the possibility of automated detection of defective solar cells within the whole solar module taken by electroluminescence methods. There is variety of possibilities to make a useful analysis of the quality of used material and technology processes during the manufacturing of solar cell and modules. One of the best from these methods that are capable to show the distribution of defects in the structure we can consider the electroluminescence which can detect defects in the fastest way. This method used in manufacturing process creates large array of data displaying local behavior of solar cell and panel structure. During the manufacturing of solar cell there is possible to make a lot of useful analysis of the quality of used material and technology processes. Among methods that are displaying distribution of defect in the structure we can count the photoluminescence, which is possible to use on uncontacted material, electroluminescence and LBIC (Light Beam Induced Current) eventually LBIV (Light Beam Induced Voltage) which can be used on contact made solar cells. All this methods are creating large array of data displaying local characteristic of solar cell structure. This data can be displayed as images or can by analyze by mathematic matrix software like Mathlab. The advantage of matrix analyze is possibility to automate the analyze process and speed up the whole process. For useful analyze there must be decide what type of defect can by automatic detected (to make the defect database), mask contact grid of analyzed data and by comparison image analyzing process found out if the solar cell contain a defect and than what type of defect is it. The only usable method for analyzing of defects in whole solar module is electroluminescence because the other method are not able to get information of all solar cells in whole module.