1. Young Investigator Group Perovskite Tandem Solar Cells, Helmholtz-Zentrum Berlin, Kekuléstraße 5, 12489 Berlin, Germany
2. Institute for Silicon Photovoltaics, Helmholtz-Zentrum Berlin, Kekuléstraße 5, 12489 Berlin, Germany
3. Faculty of Electrical Engineering, University of Ljubljana, Tržaška 25, 1000 Ljubljana, Slovenia
4. Faculty of Electrical Engineering and Computer Science, Technical University Berlin, Marchstraße 23, 10587 Berlin, Germany