1. Engineering Product Development Pillar (EPD), Singapore University of Technology and Design, 8 Somapah Road, Singapore 487372
2. Semiconductor Lighting Technology Research and Development Center, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
3. Mind Star (Beijing) Technology Co., Ltd., Zhongguancun South Street, Haidian District, No. 45 Hing Fat Building 1001, Beijing 100872, China
4. Department of Materials Science and Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, USA