1. University of Jaén,Advances in Photovoltaic Technology Research Group (AdPVTech),Jaén,Spain,23071
2. Solar Unsoiled, Inc.,Durham Nc,USA,27705
3. National Renewable Energy Laboratory,Golden,CO,USA,80401
4. Duke University,Civil and Environmental Engineering Department,Durham,NC,USA,27705
5. Sapienza University of Rome,DIAEE,Dept. of Astronautical, Electrical and Energy Eng.,Rome,Italy