Printable Organic-Inorganic Nanoscale Multilayer Gate Dielectrics for Thin-Film Transistors Enabled by a Polymeric Organic Interlayer

Yao Chen, Xinming Zhuang, Elise A. Goldfine, Vinayak P. Dravid, Michael J. Bedzyk, Wei Huang*, Antonio Facchetti, Tobin J. Marks

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Here, a new approach to the layer-by-layer solution-processed fabrication of organic/inorganic hybrid self-assembled nanodielectrics (SANDs) is reported and it is demonstrated that these ultrathin gate dielectric films can be printed. The organic SAND component, named P-PAE, consists of polarizable π-electron phosphonic acid-based units bound to a polymeric backbone. Thus, the new polymeric SAND (PSAND) can be fabricated either by spin-coating or blade-coating in air, by alternating P-PAE, a capping reagent layer, and an ultrathin ZrOx layer. The new PSANDs thickness vary from 6 to 15 nm depending on the number of organic-ZrOx bilayers, exhibit tunable film thickness, well-defined nanostructures, large electrical capacitance (up to 558 nF cm−2), and good insulating properties (leakage current densities as low as 10−6 A cm−2). Organic thin-film transistors that are fabricated with representative p-/n-type organic molecular/polymeric semiconducting materials, function well at low voltages ('3.0 V). Furthermore, flexible TFTs fabricated with PSAND exhibit excellent mechanical flexibility and good stress stability, offering a promising route to low operating voltage flexible electronics. Finally, printable PSANDs are also demonstrated and afford TFTs with electrical properties comparable to those achieved with the spin-coated PSAND-based devices.

Original languageEnglish (US)
Article number2005069
JournalAdvanced Functional Materials
Volume30
Issue number40
DOIs
StatePublished - Oct 1 2020

Keywords

  • flexible electronics
  • self-assembled nanodielectrics
  • thin-film transistors

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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