1. Institute for Solar Energy SystemsSchool of Physics and State Key Laboratory of Optoelectronic Materials and TechnologiesSun Yat-Sen University (SYSU) Guangzhou 510006 China
2. Photovoltaics and Thin Film Electronics LaboratoryInstitute of MicroengineeringÉcole Polytechnique Fédérale de Lausanne (EPFL) Rue de la Maladière 71b Neuchâtel CH-2000 Switzerland
3. CSEM PV-CenterCentre Suisse d’Électronique et de Microtechnique (CSEM) Rue Jaquet-Droz 1 Neuchâtel CH-2002 Switzerland
4. Shunde-SYSU Institute for Solar EnergyShunde-SYSU Foshan 528300 China