Science does not only take place during the day in the laboratory, but from time to time also at night. In the PV sector in particular, there are also often so-called outdoor measurements on site. For example, in addition to their work in the laboratory, the scientists at HI-ERN (Helmholtz Institute Erlangen-Nürnberg) also carry out these kind of measurements in the form of experiments and test series using existing PV systems in operation. As a result of current research activities in a joint German project, funded by the German Federal Ministry for Economic Affairs and Energy, two prototypes for outdoor photoluminescence measurements were recently evaluated on a wide variety of module concepts at our test facility in Bad Staffelstein. (more…)