1. Key Laboratory of Optoelectronic Technology and System of Ministry of Education, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, PR China
2. Key Laboratory of Agricultural Information Service Technology of Ministry of Agriculture, Agricultural Information Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
3. State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China