1. Applied Physics and Semiconductor Spectroscopy
2. Brandenburg University of Technology
3. 03046 Cottbus
4. Germany
5. Institute for Applied Materials-Energy Storage System
6. D-76344 Eggenstein-Leopoldshafe
7. King Abdullah University of Science and Technology (KAUST)
8. Physical Sciences and Engineering Division (PSE)
9. KAUST Solar Center (KSC)
10. Thuwal
11. Saudi Arabia
12. University of Fribourg
13. Adolphe Merkle Institute
14. CH-1700 Fribourg
15. Switzerland