[17p-M_B104-1~11] 12.3 Functional Materials and Novel Devices

3:00 PM - 3:15 PM JST(6:00 AM - 6:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[17p-M_B104-5] Physical Reservoirs Using Proton–Electron Mixed Conduction of Self-Doped Polythiophene Nanofilms

〇Yuya Ishizaki¹, Motoaki Onishi¹, Hirokazu Yano², Shusaku Nagano¹ (1.Rikkyo Univ., 2.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.