1. School of Materials Science and Engineering and Tianjin Key Laboratory of Molecular Optoelectronic Science Tianjin University Key Laboratory of Organic Integrated Circuits Ministry of Education, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) 300072 Tianjin P. R. China
2. Schools of Materials Science and Engineering Shandong University of Technology 255000 Zibo China
3. Joint School of National University of Singapore Tianjin University International Campus of Tianjin University, Binhai New City 350207 Fuzhou China