1. State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu 610054 China
2. School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China Chengdu 610054 China
3. Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 China
4. Department of Materials Science and Engineering City University of Hong Kong Hong Kong 999077 China
5. Key Laboratory of Advanced Materials Processing & Mold (Zhengzhou University) Ministry of Education Zhengzhou University Zhengzhou 450002 China