1. Advanced Development of High‐Efficiency Silicon Solar Cells Fraunhofer Institute for Solar Energy Systems Heidenhofstr. 2 Freiburg 79110 Germany
2. Quality Assurance, Characterization and Simulation Fraunhofer Institute for Solar Energy Systems Heidenhofstr. 2 Freiburg 79110 Germany
3. INATECH University of Freiburg Emmy-Noether-Straße 2 Freiburg 79110 Germany