Impact of p-type doping on charge transport in blade-coated small-molecule:polymer blend transistors

Aniruddha Basu, Muhammad Rizwan Niazi, Alberto D. Scaccabarozzi, Hendrik Faber, Zuping Fei, Dalaver H. Anjum, Alexandra F. Paterson, Olga Boltalina, Martin Heeney, Thomas D. Anthopoulos

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Blade-coating is a roll-to-roll (R2R) compatible processing technique and has the potential to address the industry's needs for scalable manufacturing of future organic electronics. Here we investigate the applicability of blade-coating for the fabrication of organic thin-film transistors (OTFTs) based on best-in-class organic semiconducting blends comprised of the conjugated small-molecule 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C8-BTBT), and the conjugated polymer poly(indacenodithiophene-co-benzothiadiazole) (C16IDT-BT). We show that the operating characteristics of blade-coated transistors consistently outperform devices prepared via spin-coating, showcasing the compatibility of the technique. Introducing the molecular p-dopant C60F48 into the binary C8-BTBT:C16IDT-BT blend formulation, in combination with carefully optimized blade-coating conditions, helps to enhance the performance of the ensuing transistors further resulting in a maximum hole mobility of ≈14 cm2 V-1 s-1, and an all-around improvement of the device operating characteristics. Our results show that p-doped blend OTFTs can be manufactured using industry relevant processing techniques without sacrificing their state-of-the-art performance. This journal is

Original languageEnglish
Pages (from-to)15368-15376
Number of pages9
JournalJournal of Materials Chemistry C
Volume8
Issue number43
DOIs
StatePublished - Nov 21 2020

Bibliographical note

Funding Information:
This publication is based upon work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No: RPE/1/4196-01. The authors would like to thank ALBA synchrotron and staff for their help with the GIWAXS measurements.

Publisher Copyright:
© The Royal Society of Chemistry.

ASJC Scopus subject areas

  • Chemistry (all)
  • Materials Chemistry

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