1. School of Materials Science and Engineering University of New South Wales (UNSW) Sydney NSW 2052 Australia
2. Department of Photonics and Institute of Electro‐Optical Engineering College of Electrical and Computer Engineering National Chiao Tung University Hsinchu 30010 Taiwan
3. Department of Electronic Science Fujian Engineering Research Center for Solid‐State Lighting Xiamen University Xiamen 361005 China
4. Raysolution LLC San Jose CA 95129 USA
5. Department of Materials Science and Engineering City University of Hong Kong Kowloon Hong Kong SAR 999077 China