1. School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, China
2. Key Laboratory of Information Materials of Sichuan Province & School of Electrical and Information Engineering, Southwest Minzu University, Chengdu 610041, China
3. College of Optoelectronic Engineering, Chengdu University of Information Technology, Chengdu 610225, China