1. Key Laboratory of Molecular Optoelectronic Sciences, School of Science Tianjin University Tianjin China
2. Beijing National Research Center for Molecular Sciences Chinese Academy of Sciences Beijing China
3. Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Binhai New City Fuzhou China
4. Key Laboratory of Microelectronic Devices and Circuits (MOE), Institute of Microelectronics Peking University Beijing China
5. Department of Electrical Engineering and Computer Sciences University of California Berkeley California USA