1. Key Laboratory of Rubber‐Plastics of Ministry of Education/Shandong Province (QUST) School of Polymer Science and Engineering Qingdao University of Science and Technology 53‐Zhengzhou Road Qingdao 266042 P. R. China
2. Hybrid Solar Cells Faculty of Engineering and Natural Sciences Tampere University P.O. Box 541 Tampere FI‐33014 Finland
3. Australian Research Council Centre of Excellence in Exciton Science School of Science RMIT University Melbourne Victoria 3001 Australia
4. National and Local Joint Engineering Laboratory for Slag Comprehensive Utilization and Environmental Technology School of Material Science and Engineering Shaanxi University of Technology (SNUT) Hanzhong 723001 P. R. China