Presentation Information
[9a-B12-5][The 60th Young Scientist Presentation Award Speech] Physical Reservoirs Using Proton–Electron Mixed Conduction of Self-Doped Polythiophene Nanofilms
〇Yuya Ishizaki1,2, Motoaki Onishi2, Hirokazu Yano3, Shusaku Nagano2 (1.Shinshu Univ., 2.Rikkyo Univ., 3.Tosoh Corp.)
Keywords:
Lyotropic Liquid Crystals,Mixed Conductors,Neuromorphic Devices
Self-doped poly(3,4-ethylenedioxythiophene) (S-PEDOT) is a mixed proton–electron (hole) conductor with a lyotropic liquid crystalline nature. The electronic state of the S-PEDOT nanofilms was controlled by a chemical dedoping process using multivalent amines. The mixed conducting characteristics were investigated by impedance spectroscopy under different relative humidity (RH) conditions. Results showed that the predominant conducting carrier of the S-PEDOT changed depending on the RH condition: the S-PEDOT nanofilm exhibited the hole-proton mixed conducting state at middle RH conditions (60% < RH < 80%). The waveform generation task, a benchmark task for the material reservoir, also displayed the highest accuracy at middle RH conditions. Therefore, we concluded that such a high performance is attributed to complex dynamics originating from the cooperative hole and proton mixed-conducting state of S-PEDOT nanofilms.