• Mikie, T.; Morioku, T.; Suruga, S.; Hada, M.; Sato, Y.; Ohkita, H.; Osaka, I. Dithienonaphthobisthiadiazole Synthesized by Thienannulation of Electron-Deficient Rings: An Acceptor Building Unit for High-Performance π-Conjugated Polymers. Chem. Sci. 2024, 15 (47), 19991–20001. DOI
   
• Mikie, T.; Okamoto, K.; Iwasaki, Y.; Koganezawa, T.; Sumiya, M.; Okamoto, T.; Osaka, I. Naphthobispyrazine Bisimide: A Strong Acceptor Unit for Conjugated Polymers Enabling Highly Coplanar Backbone, Short π–π Stacking, and High Electron Transport. Chem. Mater. 2022, 34 (6), 2717–2729. DOI
   
• Mikie, T.; Hayakawa, M.; Okamoto, K.; Iguchi, K.; Yashiro, S.; Koganezawa, T.; Sumiya, M.; Ishii, H.; Yamaguchi, S.; Fukazawa, A.; Osaka, I. Extended π Electron Delocalization in Quinoid-Based Conjugated Polymers Boosts Intrachain Charge Carrier Transport. Chem. Mater. 2021, 33 (21), 8183–8193. DOI

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KAKEN

Dr. Mikie was born in the Ehime Prefecture, Japan. In 2008, he graduated from the National Institute of Technology,
Niihama College and then transferred to the School of Engineering, Hiroshima University. In 2010, he advanced to the Graduate School of Engineering, Osaka University and received his PhD in 2015. In 2014, he studied abroad at the University of Texas at El Paso. From 2015, he spent one year at the Massachusetts Institute of Technology. Beginning in April 2016, he served as a postdoctoral researcher at the Institute of Physical and Chemical Research (RIKEN). In October 2016, he became a postdoctoral researcher at the Graduate School of Engineering, Hiroshima University. In April 2018, he was appointed as a Research Fellowship for Young Scientists of the Japan Society for the Promotion of Science. He has appointed his current position since April 2020.

Organic photovoltaic cells (OPVs) that use polymer semiconductors have attracted significant attention as cost-effective and environmentally friendly alternatives to the currently dominant counterparts based on inorganic silicon and its compounds. Furthermore, their light-weight, flexible, and semitransparent properties are expected to pioneer a new market for photovoltaic technology. However, OPVs still lag behind inorganic photovoltaics in performance. A major reason for the performance limitation of the OPVs would be the low charge carrier mobility of polymer semiconductors. With this in mind, Dr. Mikie has been developing a novel -conjugated building unit
that endows high charge carrier mobility to polymer semiconductors. In fact, polymer semiconductors based on newly developed building units boost the charge carrier mobility and significantly improve the OPV performance. Furthermore, Dr. Mikie starts to apply these polymer semiconductors as photocatalysts for water splitting.