1. Institute of Photoelectronic Thin Film Devices and Technology, Solar Energy Conversion Center Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education Nankai University Tianjin 300350 P. R. China
2. Institute for Advanced Interdisciplinary Research (IAIR) University of Jinan Jinan Shandong 250022 P. R. China
3. School of Materials Science and Engineering Nankai University Tianjin 300350 P. R. China
4. Frontiers Science Centre for Flexible Electronics (FSCFE) MIIT Key Laboratory of Flexible Electronics (KLoFE) Shaanxi Key Laboratory of Flexible Electronics Xi'an Key Laboratory of Flexible Electronics Xi'an Key Laboratory of Biomedical Materials & Engineering Xi'an Institute of Flexible Electronics Institute of Flexible Electronics (IFE) Northwestern Polytechnical University Xi'an Shaanxi 710072 P. R. China
5. Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of Chemistry Tianjin University Tianjin 300072 P. R. China