Assessing the long-term stability of laser enhanced contact optimization (LECO) treated PERC cells in PV modules by extended indoor and outdoor durability tests

It was previously shown that the Laser Enhanced Contact Optimization (LECO) Process is a promising boost for PERC and TOPCon cell manufacturing enhancement. In this contribution, method developed to assess long-term stability of industrial LECO treated cells in module compound. Therefore, extended accelerated aging tests as well outdoor measurements were performed on modules comprising untreated references. described, how data can be evaluated separate typical, known degradation effects from presumable specific effects. The results work show test did not different behavior or compared reference. same conclusion found thermal cycling damp heat tests, both far excess IEC requirements, sequential sequence. addition, their performance with local integral has been evaluated. We conclude tested cells, appeared, but none them could attributed process. Hence, improvements efficiency and/or yield level due translated even system considering typical behavior, independently prior