1. Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, China
2. Photovoltaic and Laser Laboratory, National Institute of Measurement and Testing Technology, Chengdu, China
3. Glasgow College, University of Electronic Science and Technology of China, Chengdu, China
4. Institute of Fundamental and Frontier Sciences and the State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, China