1. School of Photovoltaic and Renewable Energy Engineering, Australian Centre for Advanced Photovoltaics University of New South Wales Sydney Kensington New South Wales 2052 Australia
2. Energy, Transport and Climate European Commission – Joint Research Centre Via E. Fermi 2749 Varese IT‐21027 Italy
3. Department of Characterisation and Simulation/CalLab Cells Fraunhofer‐Institute for Solar Energy Systems Heidenhofstr. 2 Freiburg D‐79110 Germany
4. Renewable Energy Research Center (RENRC) National Institute of Advanced Industrial Science and Technology (AIST) Central 2, Umezono 1‐1‐1, Tsukuba Ibaraki 305‐8568 Japan
5. Solar Energy Research Facility (SERF) National Renewable Energy Laboratory 15013 Denver West Parkway Golden CO 80401 USA