Large-area printed low-voltage organic thin film transistors: Via minimal-solution bar-coating

Sujin Sung, Won June Lee, Marcia M. Payne, John E. Anthony, Chang Hyun Kim, Myung Han Yoon

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Herein, we report on the fabrication of large-area printed low-voltage organic thin film transistor arrays via minimal-solution bar-coating. We established the bar-coating of the chemically cross-linked polymer dielectric based on poly(4-vinylphenol) and 4,4′-(hexafluoroisopropylidene)diphthalic anhydride by investigating the effects of composition, reaction and printing conditions on film thickness, cross-linking efficacy, and dielectric properties. Subsequently, we elucidated various aspects of large-area (up to 4-inch wafer) bar-coated cross-linked polymeric dielectric prepared from minimal solution (∼100 μL, ∼1.2 μL cm-2) by addressing film uniformity, thickness control, capacitance variation, underlying step coverage, patternability, etc. The resultant polymeric dielectric exhibited good insulating properties as exemplified by a low leakage current density of ∼10-8 A cm-2 (at 1 MV cm-1) and a high areal capacitance of 42.6 nF cm-2. Finally, a highly-crystallized organic semiconductor layer based on 2,8-difluorinated 5,11-bis(triethylsilylethynyl)anthradithiophene was deposited on the bar-coated cross-linked polymeric dielectric via bar-coating, leading to the realization of printed low-voltage organic transistor arrays with minimum ink solution wasted.

Original languageEnglish
Pages (from-to)15112-15118
Number of pages7
JournalJournal of Materials Chemistry C
Volume8
Issue number43
DOIs
StatePublished - Nov 21 2020

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation (NRF) grant funded by the Korea government (MSIT) (NRF-2018M3A7B4070988, NRF-2020M3D1A1030660, NRF-2020M3-D1A1069831) and, by GIST Research Institute (GRI) grant funded by the GIST in 2020.

Funding Information:
This work was supported by the National Research Foundation (NRF) grant funded by the Korea government (MSIT) (NRF-2018M3A7B4070988, NRF-2020M3D1A1030660, NRF-2020M3D1A1069831) and, by GIST Research Institute (GRI) grant funded by the GIST in 2020.

Publisher Copyright:
© The Royal Society of Chemistry.

ASJC Scopus subject areas

  • Chemistry (all)
  • Materials Chemistry

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