1. Division of Display and Semiconductor Physics, Display Convergence, College of Science and Technology, Korea University Sejong Campus, 2511 Sejong-ro, Sejong City 30019, Republic of Korea
2. Department of Mechanical Engineering, University of Colorado, 427 UCB, Boulder, CO 80309-0427, USA
3. School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China
4. Advanced Functional Thin Films Department, Korea Institute of Materials Science (KIMS) Changwon 51508, Republic of Korea