1. Fraunhofer Institute for Solar Energy Systems ISE, Heidenhofstraße 2, 79110 Freiburg, Germany
2. Institute of Inorganic and Analytical Chemistry, University of Freiburg, Albertstraße 21, 79104 Freiburg, Germany
3. Cluster of Excellence livMatS@FIT—Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
4. Laboratory for Photovoltaic Energy Conversion, Department of Sustainable Systems Engineering, Albert-Ludwigs-Universität Freiburg, Emmy-Noether-Str. 2, 79110 Freiburg, Germany
5. Freiburg Materials Research Center (FMF), University of Freiburg, Stefan-Meier-Straße 21, 79104 Freiburg, Germany