1. Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewabel Energy (IEK-11), Immerwahrstraße 2, 91058 Erlangen, Germany
2. Institute of Materials for Electronics and Energy Technology (i-MEET), Department of Materials Science and Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Martensstraße 7, 91058 Erlangen, Germany