1. School
of Materials Science and Engineering, Guilin University of Electronic Technology, No. 1, Jinji Road, Guilin 541004, People’s Republic of China
2. Guangxi
Key Laboratory of Information Materials, Guilin University of Electronic Technology, No. 1, Jinji Road, Guilin 541004, People’s Republic of China
3. Dalian
Institute of Chemical Physics, Chinese Academy of Sciences, No. 457,
Zhongshan Road, Dalian 116023, People’s Republic of China