1 Materials for Electronics and Energy Technology (i-MEET), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Martensstraße 7, 91058 Erlangen, Germany.
2 Erlangen Graduate School in Advanced Optical Technologies (SAOT), Paul-Gordan-Street 6, 91052 Erlangen, Germany.
3 Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Egerlandstraße 1, 91058 Erlangen, Germany.
4 Department of Chemistry and Pharmacy, Institute of Chemistry of Thin Film Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstraße 3, 91058 Erlangen, Germany.
5 Department of Materials Science and Engineering, Institute of Micro- and Nanostructure Research, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstraße 3, 91058 Erlangen, Germany.
6 State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering, University of Electronic Science and Technology of China (UESTC), 611731 Chengdu, P. R. China.