1. Photo-Electronic
Hybrids Research Center, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea
2. Department of Chemical Engineering, Materials
Science, Chung-Ang University, Seoul 156-756, Republic of Korea
3. Department of Civil, Environmental
and Architectural Engineering, Korea University, Seoul 136-713, Republic of Korea
4. KU-KIST Graduate School
of Converging Science and Technology, Korea University, Seoul 136-701, Republic of Korea