1. Faculty
of Physics and Earth Sciences, Leipzig University, Linnéstr. 5, D-04103 Leipzig, Germany
2. School
of Chemical Engineering, National Technical University of Athens, 15780 Athens, Greece
3. Fraunhofer Institute for Solar Energy Systems ISE, 79110 Freiburg, Germany
4. Department
of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117576, Singapore
5. Institute
for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States