1. Physical Chemistry TU Dresden Zellescher Weg 19 01069 Dresden Germany
2. Max Planck Institute of Chemical Physics of Solids Nöthnitzer Str. 40 01187 Dresden Germany
3. Semiconductor Physics Chemnitz University of Technology Reichenhainer Str. 70 09126 Chemnitz Germany
4. Institute of Semiconductor Physics National Academy of Sciences of Ukraine Nauky av. 45 03028 Kyiv Ukraine
5. Dresden Center for Nanoanalysis TU Dresden Helmholtzstraße 18 01069 Dresden Germany
6. Leibniz Institute for Solid State and Materials Research Dresden Helmholtzstraße 20 01069 Dresden Germany
7. Institute of Applied Physics TU Dresden Nöthnitzer Str. 61 01187 Dresden Germany
8. Institute of Materials Science TU Dresden Helmholtzstr. 7 01069 Dresden Germany