1. Research and Development Center for Solid-State Lighting, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
2. School of Physics and Electronic Information Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan Province China
3. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
4. The State Key Laboratory on Integrated Optoelectronics, Institution of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
5. Korea Institute of Ceramic Engineering and Technology, 15-5, Chungmugong-dong, Jinju-si, Gyeongsongnam-do 52851, Korea