Rapid growth of PV Industries requests "Easy" and "Fast" Inspection Systems for PV Cells and Modules. EL Method and SRLBIC Method have been used generally. But both methods are not systems to visualize PV cell Conversion Efficiency Distribution that is the most important characteristic of PV cells. Lasertec has developed PV Cell Efficiency Mapping System based on such a background. Here I review a technical feature and the development concept of this system.
