1. Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education Huazhong University of Science and Technology Wuhan China
2. Department Organic and Perovskite Photovoltaics Fraunhofer Institute for Solar Energy Systems ISE Freiburg Germany
3. Physics of Solar Energy Conversion Group, Department of Physics Philipps‐University Marburg Marburg Germany