1. Department
of Organic Materials Science, Graduate School of Organic Materials
Science, Yamagata University, 4-3-16 Jo-nan, Yonezawa, Yamagata 992-8510, Japan
2. Organic
Nanoelectronics Laboratory, Department of Chemical Engineering, School
of Applied Chemical Engineering, Kyungpook National University, University Road 80, Daegu 41566, Republic of Korea
3. Department of Chemistry, Division of Advanced Materials Science, Polymer Research Institute, and Pohang Accelerator Laboratory, Pohang University of Science & Technology, Pohang 37673, Republic of Korea