1. School of Photovoltaic and Renewable Energy Engineering Australian Centre for Advanced PhotovoltaicsUniversity of New South Wales Sydney 2052 Australia
2. Directorate C—Energy, Transport and ClimateEuropean Commission—Joint Research CentreVia E. Fermi 2749, IT‐21027 Ispra (VA), Italy
3. Department of Characterisation and Simulation/CalLab CellsFraunhofer‐Institute for Solar Energy Systems Heidenhofstr. 2 D‐79110 Freiburg Germany
4. Research Center for Photovoltaics (RCPV)National Institute of Advanced Industrial Science and Technology (AIST) Central 2, Umezono 1‐1‐1, Tsukuba Ibaraki 305‐8568 Japan
5. National Renewable Energy Laboratory15013 Denver West Parkway Golden Colorado 80401 USA