Yong Zhou*†, Xian Li‡, Yanjie Wang†, Huiling Tai§, and Yongcai Guo†
† Key Laboratory of Optoelectronic Technology and System of Ministry of Education, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, PR China
‡ Key Laboratory of Agricultural Information Service Technology of Ministry of Agriculture, Agricultural Information Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
§ 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