Large-Area Uniform Polymer Transistor Arrays on Flexible Substrates: Towards High-Throughput Sensor Fabrication

Andrew M. Zeidell, David S. Filston, Matthew Waldrip, Hamna F. Iqbal, Hu Chen, Iain McCulloch, Oana D. Jurchescu

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

Solution-processable organic semiconductors can serve as the basis for new products including rollable displays, tattoo-like smart bandages for real-time health monitoring, and conformable electronics integrated into clothing or even implanted in the human body. For such exciting commercial applications to become a reality, good device performance and uniformity over large areas are necessary. The design of new materials has progressed at an astonishing pace, but accessing their intrinsic, efficient electrical properties in large-area flexible device arrays is difficult. The development of protocols that allow integration with industrial-scale processing for high-throughput manufacturing, without the need to compromise on performance, is the key for transitioning these materials to real-life applications. In this work, large-area arrays of organic thin-film transistors obtained by spray-coating the high-mobility polymer indacenodithiophene-co-benzothiadiazole (IDTBT) are demonstrated. A maximum charge carrier mobility of 2.3 cm2 V−1 s−1, with a very narrow performance distribution, is obtained over surface areas of 10 cm × 10 cm. The devices retain their electrical properties when bent multiple times and at different curvatures. In addition, large arrays of highly sensitive (0.25% change in mobility for 1% humidity variation), reusable, near-identical humidity sensors are produced in a one-step fabrication and calibrated from 0% to 94% relative humidity.

Original languageEnglish (US)
Article number2000390
JournalAdvanced Materials Technologies
Volume5
Issue number8
DOIs
StatePublished - Aug 1 2020
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Mechanics of Materials
  • Industrial and Manufacturing Engineering

Keywords

  • flexible electronics
  • large-area electronics
  • semiconductors
  • sensors
  • spray coating

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