1. Department of Organic
and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan
2. Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan
3. Department of Organic Device Engineering
and Research Center for Organic Electronics, Yamagata University, Yonezawa, Yamagata 992-8510, Japan
4. Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan