1. Gansu Provincial Engineering Research Center for Organic Semiconductor Materials and Application Technology, School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China
2. School of Chemical Engineering, Northwest Minzu University, Lanzhou, 730030, China
3. School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China
4. 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