1. World Premier International Center for Materials Nanoarchitectonics (WPI-MANA); National Institute for Materials Science (NIMS); Tsukuba Ibaraki 305-0044 Japan
2. Colloidal Ink. Co., Ltd; Sojya-shi Okayama 719-1121 Japan
3. State Key Laboratory of Optoelectronic Materials and Technologies; Guangdong Province Key Laboratory of Display Material and Technology and School of Electronics and Information Technology; Sun Yat-sen University; Guangzhou 510275 P. R. China
4. The University of Tokyo; 5-1-5 Kashiwanoha Kashiwa 277-8561 Chiba Japan