1. Department
of Chemistry, Division of Advanced Materials Science, Center for Electro-Photo
Behaviors in Advanced Molecular Systems, Polymer Research Institute,
and BK School of Molecular Science, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
2. Polymeric
and Organic Materials Department, Graduate School of Science and Engineering, Tokyo Institute of Technology, H-127, 2-12-1, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
3. Pohang
Accelerator Laboratory, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea