1. Key
Lab of Organic Optoelectronics and Molecular Engineering, Department
of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
2. Key
Laboratory of Photochemical Conversion and Optoelectronic Materials,
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
3. Institute
of Physical Chemistry, University of Muenster, Correnstraße 28/30, 48149 Münster, Germany