1. IEK-5 Photovoltaik, Forschungszentrum Jülich,
Leo-Brandt Straße, 52425 Jülich, Germany
2. Institute for Solar Energy Systems, Guangdong Provincial Key Laboratory of Photovoltaic Technology, Sun Yat-sen University, 510006
Guangzhou, China
3. International Solar Energy Research Center – ISC Konstanz, Rudolf-Diesel Straße 15, 78467 Konstanz,
Germany