1. Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany
2. Laboratory for Electron Microscopy, KIT, 76131 Karlsruhe, Germany
3. Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg (ZSW), 70563 Stuttgart, Germany
4. NICE Solar Energy GmbH, 74523 Schwäbisch Hall, Germany
5. Light Technology Institute, KIT, 76131 Karlsruhe, Germany