1. Australian Centre for Advanced Photovoltaics; University of New South Wales; Sydney 2052 Australia
2. National Renewable Energy Laboratory; 15013 Denver West Parkway Golden CO 80401 USA
3. National Institute of Advanced Industrial Science and Technology (AIST); Research Center for Photovoltaics (RCPV); Central 2, Umezono 1-1-1 Tsukuba Ibaraki 305-8568 Japan
4. Fraunhofer-Institute for Solar Energy Systems; Department: Solar Cells - Materials and Technology; Heidenhofstr. 2 D-79110 Freiburg Germany
5. European Commission - Joint Research Centre; Renewable Energy Unit, Institute for Energy; Via E. Fermi 2749 IT-21027 Ispra (VA) Italy