1. School of Electronic Science and Engineering, State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, PR China
2. Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou, Zhejiang 313001, PR China
3. Department of Petroleum, Oil and Lubricants, Army Logistic Academy of PLA, Chongqing 401331, PR China
4. Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong Province 518055, PR China