1. Institute of Materials for Electronics and Energy Technology (I-MEET), Department of Materials Science and Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Martensstrasse 7, Erlangen 91058, Germany
2. Erlangen Graduate School in Advanced Optical Technologies (SAOT), Paul-Gordan-Strasse 6, Erlangen 91052, Germany
3. Institute of the Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 15, Tübingen 72074, Germany
4. Bavarian Center for Applied Energy Research (ZAE Bayern), Haberstrasse 2a, Erlangen 91058, Germany