1. Key Lab of Semiconductor Materials Science
2. Institute of Semiconductors
3. Chinese Academy of Sciences
4. Beijing 100083
5. P. R. China
6. College of Applied Sciences
7. Beijing University of Technology
8. Beijing 100124
9. Key Laboratory of Micro-Nano Electronic Device and Smart System of Zhejiang Province
10. College of Information Science & Electronic Engineering
11. Zhejiang University
12. Hangzhou 310027