1. School of Materials Science and Engineering Shanghai University 99 Shangda Road Shanghai 200444 China
2. School of Physics and Materials Science Guangzhou University Guangzhou 510006 China
3. Research Center for Advanced Information Materials (CAIM) Huangpu Research & Graduate School of Guangzhou University Sino-Singapore Guangzhou Knowledge City Huangpu District Guangzhou 510555 China
4. Centre for Future Materials University of Southern Queensland Springfield Queensland 4300 Australia
5. School of Materials Science and Engineering Guilin University of Electronic Technology Guilin 541004 China
6. Guangxi Key Laboratory of Information Materials Guilin University of Electronic Technology Guilin 541004 China