Researcher Information


Assistant Professor

Development of organic semiconductors

Department of Chemistry, Physical Chemistry


Development of high-performance semiconductor material by charge injection to the surface of organic crystal

FieldPhysical chemistry, Solid state physics, Electronics
KeywordMolecular solid, Charge transfer complex, Organic electronics

Introduction of Research

In recent, development of next generation devices such as flexible and wearable is required to establish a ubiquitous or IoT society. As one option, research to develop those devices by using organic materials as semiconductor materials is promising, and research on organic electronics is currently conducted all over the world. I am conducting research aiming at the development of new organic semiconductor materials applicable to these next generation devices.

Representative Achievements

“Band-Like Carrier Transport at the Single-Crystal Contact Interfaces between 2,5-Difluoro-7,7,8,8-tetracyanoquinodimethane and Electron Donors” Takuro Shimada, Yukihiro Takahashi, Jun Harada, Hiroyuki Hasegawa, and Tamotsu Inabe, J. Phys. Chem. Lett., 9, 420-424 (2018).
“Ferroelectricity and Piezoelectricity in Free-Standing Polycrystalline Films of Plastic Crystals” Jun Harada, Naho Yoneyama, Seiya Yokokura, Yukihiro Takahashi, Atsushi Miura, Noboru Kitamura, and Tamotsu Inabe, J. Am. Chem. Soc., 140 , 346–354 (2018).
“Effective band gap tuning by foreign metal doping in hybrid tin iodide perovskites” Hiroyuki Hasegawa, Keisuke Kobayashi, Yukihiro Takahashi, Jun Harada and Tamotsu Inabe, J. Mater. Chem. C, 5, 4048-4052 (2017).
“Fabrication of Conducting Thin Films on the Surfaces of 7,7,8,8-Tetracyanoquinodimethane Single-Component and Charge-Transfer Complex Single Crystals: Nucleation, Crystal Growth, Morphology, and Charge Transport” Yukihiro Takahashi, Tomohiro Mikasa, Kei Hayakawa, Seiya Yokokura, Hiroyuki Hasegawa, Jun Harada, and Tamotsu Inabe, J. Phys. Chem. C, 120, 17573-17545 (2016).
“Switching of Transfer Characteristics of an Organic Field-Effect Transistor by Phase Transitions: Sensitive Response to Molecular Dynamics and Charge Fluctuation” Seiya Yokokura, Yukihiro Takahashi, Hiroki Nonaka, Hiroyuki Hasegawa, Jun Harada, Tamotsu Inabe, Reiji Kumai, Hiroshi Okamoto, Michio M. Matsushita, and Kunio Awaga, Chem. Mater. 27, 4441-4449 (2015).