1. Semiconductor Physics, Chemnitz University of Technology, D-09107 Chemnitz, Germany
2. Center for Materials, Architectures, and Integration of Nanomembranes (MAIN), Chemnitz University of Technology, D-09107 Chemnitz, Germany
3. L.V. Pysarzhevsky Institute of Physical Chemistry, Natinal Academy of Sciences of Ukraine, 03028 Kyiv, Ukraine
4. Forschungszentrum Jülich GmbH, Helmholtz-Institut Erlangen Nürnberg für Erneuerbare Energien (HI ERN), Immerwahrstr. 2, 91058 Erlangen, Germany
5. Institute of Electron Physics, Natinal Academy of Sciences of Ukraine, 88017 Uzhhorod, Ukraine
6. Uzhhorod National University, 88000 Uzhhorod, Ukraine
7. Friedrich-Alexander-Universität Erlangen-Nürnberg, Materials for Electronics and Energy Technology (i-MEET), Martensstrasse 7, 91058 Erlangen, Germany