Non-destructive techniques for quality control of PV modules: Infrared thermography, electro- and photoluminescence imaging

For a complete quality control of PV cells and modules, a combination of fast and non-destructive methods was investigated. Camera-based measurements, such as electroluminescence (EL), photoluminescence (PL), and infrared (IR) technologies offer excellent possibilities for determining production failures or defects in solar cells and modules, which cannot be detected by means of standard power measurements. The work presented in this paper focuses on quality control and characterization using EL, PL and IR imaging with conventional cameras and an alternative excitation source for the PL-setup.