Highly Reliable Superhydrophobic Protection for Organic Field-Effect Transistors by Fluoroalkylsilane-Coated TiO2 Nanoparticles

Daekyoung Yoo, Youngrok Kim, Misook Min, Geun Ho Ahn, Der Hsien Lien, Jingon Jang, Hyunhak Jeong, Younggul Song, Seungjun Chung, Ali Javey, Takhee Lee*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


One of the long-standing problems in the field of organic electronics is their instability in an open environment, especially their poor water resistance. For the reliable operation of organic devices, introducing an effective protection layer using organo-compatible materials and processes is highly desirable. Here, we report a facile method for the depositing of an organo-compatible superhydrophobic protection layer on organic semiconductors under ambient conditions. The protection layer exhibiting excellent water-repellent and self-cleaning properties was deposited onto organic semiconductors directly using a dip-coating process in a highly fluorinated solution with fluoroalkylsilane-coated titanium dioxide (TiO2) nanoparticles. The proposed protection layer did not damage the underlying organic semiconductors and had good resistance against mechanical-, thermal-, light-stress-, and water-based threats. The protected organic field-effect transistors exhibited more-reliable electrical properties, even when exposed to strong solvents, due to its superhydrophobicity. This study provides a practical solution with which to enhance the reliability of environmentally sensitive organic semiconductor devices in the natural environment.

Original languageEnglish
Pages (from-to)11062-11069
Number of pages8
JournalACS Nano
Issue number11
StatePublished - 27 Nov 2018


  • nanoparticles
  • organic electronics
  • organic semiconductor
  • reliability
  • superhydrophobic surface

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