1. Department of Display Engineering, Pukyong National University, Busan, Republic of Korea
2. Department of Electrical Energy Engineering, Keimyung University, Daegu, Republic of Korea
3. Surface Technology Division, Korea Institute of Materials Science (KIMS), Changwon, Republic of Korea
4. Center for Nano-Photonics Convergence Technology, Korea Institute of Industrial Technology (KITECH), Gwangju, Republic of Korea