SuPerB

Photovoltaics are an essential pillar of the energy transition. It is therefore essential that technologies are developed that further improve the yield. Equally important, however, are economical production and the longest possible application period. Perovskite solar cells have some good prerequisites for this, as they enable very high efficiencies, especially in combination with CIGS solar cells. In addition, they can be manufactured and processed in vacuum-free processes, which in principle allows less complex production processes.

Perovskites are organic-inorganic crystals that basically contain lead. Alternative suitable lead-free materials have not yet been identified. The necessary lead represents a challenge in itself due to its toxicity. In addition, perovskites are very sensitive to moisture, posing a further challenge to long-term stability.

Therefore, the project aims to develop methods to ensure that the modules will perform reliably in long-term use in ambient moisture and rain, and that lead will not leak into the environment. To this end, a layer system is being developed that protects the perovskite layer from moisture during operation, and novel lead bonding layers are being researched that bind lead that has been washed out in the event of damage, thus preventing it from leaking into the environment.