1. Institute of Microstructure Technology Karlsruhe Institute of Technology (KIT) Hermann‐von‐Helmholtz‐Platz 1 76344 Karlsruhe Germany
2. Light Technology Institute Karlsruhe Institute of Technology (KIT) Engesserstrasse 13 76131 Karlsruhe Germany
3. Institute of Energy and Climate Research IEK‐5 Photovoltaics Forschungszentrum Jülich GmbH 52428 Jülich Germany