1. Inorganic Solid-State Chemistry Saarland University Campus C4 1 66123 Saarbrücken Germany
2. INM—Leibniz Institute for New Materials 66123 Saarbrücken Germany
3. Department of Materials Science and Engineering Saarland University 66123 Saarbrücken Germany
4. Leibniz Institute for Plasma Science and Technology Felix-Hausdorff-Straße 2 17489 Greifswald Germany
5. Saarene—Saarland Center for Energy Materials and Sustainability 66123 Saarbrücken Germany