1. Graduate School of Science and Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
2. ISE CHEMICALS Corporation, 1-3-1 Kyobashi, Chuo-ku, Tokyo 104-0031, Japan
3. ZEON Corporation, 1-6-2 Marunouchi, Chiyoda-ku, Tokyo 100-8246, Japan
4. Graduate School of Organic Material Science, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
5. Research Center for Organic Electronics (ROEL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan