1. Center for Solar Energy and Hydrogen Research Baden-Württemberg (ZSW), Meitnerstrasse 1, Stuttgart, 70563, Germany
2. Light Technology Institute, Karlsruhe Institute of Technology (KIT), Engesserstrasse 13, Karlsruhe 76131, Germany
3. Institute of Microstructure Technology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen 76344, Germany