1. Department
of Electronic Engineering, The Chinese University of Hong Kong, Hong Kong
SAR, People’s Republic of China
2. Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Hubei Key Laboratory of Ferro & Piezoelectric Materials and Devices, Faculty of Physics & Electronic Sciences, Hubei University, 368 Youyi Road, Wuhan 430062, People’s Republic of China
3. Department
of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States