1. School of Polymer Science and Engineering & College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao 266042 P. R. China
2. Hybrid Solar Cells, Faculty of Engineering and Natural Sciences Tampere University FI-33014 Tampere Finland
3. Australian Research Council Centre of Excellence in Exciton Science School of Science RMIT University Melbourne Victoria 3000 Australia
4. JSPS International Research Fellow Center for Computational Sciences University of Tsukuba Tsukuba Ibaraki 305-0006 Japan
5. National and Local Joint Engineering Laboratory for Slag Comprehensive Utilization and Environmental Technology School of Materials Science and Engineering Shaanxi University of Technology (SNUT) Hanzhong 723001 P. R. China