1. Gansu Province Organic Semiconductor Materials and Technology Research Center, School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
2. Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, School of Electronics and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, China
3. Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China