Universal Spray-Deposition Process for Scalable, High-Performance, and Stable Organic Electrochemical Transistors

Xihu Wu, Abhijith Surendran, Maximilian Moser, Shuai Chen, Bening Tirta Muhammad, Iuliana Petruta Maria, Iain Mcculloch, Wei Lin Leong

Research output: Contribution to journalArticlepeer-review

52 Scopus citations


Organic electrochemical transistors (OECTs) with high transconductance and good operating stability in an aqueous environment are receiving substantial attention as promising ion-to-electron transducers for bioelectronics. However, to date, in most of the reported OECTs, the fabrication procedures have been devoted to spin-coating processes that may nullify the advantages of large-area and scalable manufacturing. In addition, conventional microfabrication and photolithography techniques are complicated or incompatible with various nonplanar flexible and curved substrates. Herein, we demonstrate a facile patterning method via spray deposition to fabricate ionic-liquid-doped poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)-based OECTs, with a high peak transconductance of 12.9 mS and high device stability over 4000 switching cycles. More importantly, this facile technique makes it possible to fabricate high-performance OECTs on versatile substrates with different textures and form factors such as thin permeable membranes, flexible plastic sheets, hydrophobic elastomers, and rough textiles. Overall, the results highlight the spray-deposition technique as a convenient route to prepare high-performing OECTs and will contribute to the translation of OECTs into real-world applications.

Original languageEnglish (US)
Pages (from-to)20757-20764
Number of pages8
JournalACS Applied Materials and Interfaces
Issue number18
StatePublished - May 6 2020
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Materials Science


  • bioelectronics
  • facile patterning technique
  • flexible electronics
  • organic electrochemical transistors
  • spray deposition


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