1. Department
of Materials Science and Engineering, Hongik University, Seoul 121-791, Korea
2. Thin
Film Materials Research Group, Korea Research Institute of Chemical Technology, Daejeon 305-600, Korea
3. Flexible
Display Research Center, Korea Electronics Technology Institute, Bundang-gu,
Seongnam-si, Gyeonggi-do 463-816, Korea
4. Department
of Chemistry, Kookmin University, Seoul 136-702, Korea