1. Solid State Physics/NanoLund, Lund University, Lund, Sweden
2. Fraunhofer Institute for Solar Energy Research, Freiburg, Germany
3. IBM Research Laboratory, Ruschlikon, Switzerland
4. Sol Voltaics AB, Lund, Sweden
5. University of Leiden, Leiden, The Netherlands
6. C2N-CNRS, University Paris Sud, University Paris Saclay, Orsay, France