1. Department of Energy Systems Research and Department of Materials Science and Engineering, Ajou University, Suwon 16499, Republic of Korea.
2. School of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UK.
3. Department of Physics, Mokpo National University, Muan 58554, Republic of Korea.
4. School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16409, Republic of Korea.
5. Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.
6. International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.
7. Mobile Display Process Architecture, Samsung Display, Asan 31454, Republic of Korea.