1. Department of Display Engineering; Pukyong National University; Busan 608-737 Republic of Korea
2. OLED Research Center; Electronics and Telecommunications Research Institute (ETRI); Daejeon 305-700 Republic of Korea
3. Department of Materials Science and Engineering; Yonsei University; Seoul 120-749 Republic of Korea
4. Department of Creative Convergence Engineering; Hanbat National University; Daejeon 305-719 Republic of Korea
5. Center for Nano-Photonics Convergence Technology; Korea Institute of Industrial Technology; Gwangju 500-480 Republic of Korea