1. State Key Laboratory
of Silicon Materials, Zhejiang University, Hangzhou 310027, China
2. World Premier International Research Center Initiative for Materials
Nanoarchitronics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044,
Japan
3. PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho
Kawaguchi, Saitama 332-0012, Japan
4. Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
5. National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba-city,
Ibaraki 305-0047, Japan
6. Graduate School of Pure and Science and Applied Science, The University of Tsukuba, 1-1-1 Tennodai, Tsukuba,
Ibaraki 305-8577, Japan
7. Department of Electrical and Electronic Engineering, Kobe University, Kobe 657-8501, Japan
8. State Key Laboratory of Luminescent Materials and
Devices, South China University of Technology, Guangzhou 510640, China