Switching of Electron and Ion Conductions by Reversible H2O Sorption in n-Type Organic Semiconductors

Haruka Abe, Ayumi Kawasaki, Takashi Takeda, Norihisa Hoshino, Wakana Matsuda, Shu Seki, Tomoyuki Akutagawa

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Polar H2O molecules generally act as trapping sites and suppress the electron mobility of n-Type organic semiconductors, making chemical design of H2O-Tolerant and responsive n-Type semiconductors an important step toward multifunctional electron-ion coupling devices. The introduction of effective electrostatic interactions between potassium ions (K+) and carboxylate (-COO-) anions into the electron-Transporting naphthalenediimide I-framework enables the design of high-performance H2O-Tolerant n-Type semiconductors with a reversible H2O adsorption-desorption ability, where the electron mobility and K+ ionic conductivity were coupled with the reversible H2O sorption behavior. The reversible H2O adsorption into the crystals enhanced the electron mobility from 0.04 to 0.28 cm2 V-1 s-1, whereas the K+ ionic conductivity decreased from 3.4 × 10-5 to 4.7 × 10-7 S cm-1. Because this reversible electron-ion conducting switch is responsive to H2O sorption behavior, it is a strong candidate for H2O gating carrier transport systems.

Original languageEnglish
Pages (from-to)37391-37399
Number of pages9
JournalACS Applied Materials and Interfaces
Issue number33
Publication statusPublished - 2020 Aug 19


  • HO adsorption
  • dielectric response
  • electron transport
  • ionic conductor
  • naphthalenediimide
  • organic salt
  • organic semiconductor

ASJC Scopus subject areas

  • Materials Science(all)

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