Inkjet printing of transparent and conductive patterns of single-walled carbon nanotubes and PEDOT-PSS composites

Tero Mustonen*, Krisztián Kordás, Sami Saukko, Géza Tóth, Jari S. Penttilä, Panu Helistö, Heikki Seppä, Heli Jantunen

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    112 Citations (Scopus)

    Abstract

    Transparent and conductive patterns of carboxyl functionalized single-walled carbon nanotubes (SWCNT-COOHs) and the composites of those with poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT-PSS) were deposited on various substrates by inkjet printing. For low print repetitions, the PEDOT-PSS/SWCNT-COOH composite patterns show enhanced conductance as compared to the corresponding PEDOT-PSS conductors. The results suggest a decreased percolation threshold for the printed composite since the nanotubes establish electrical interconnections between the separate PEDOT-PSS (conductive phase) islands being dispersed in the insulating PSS-phase. However, the interaction between PEDOT-PSS and SWCNTs becomes insignificant and the conductivity is not enhanced by the nanotubes, when the amount of PEDOT-PSS is sufficient to form a continuous conducting phase. Up to now, patterns having sheet resistivities as low as ∼1 kΩ/□ could be achieved. Though there is a trade-off between transparency and conductivity – we achieved highly transparent patterns (∼90%) with a reasonably low resistivity of ∼10 kΩ/□. The ink and printing method proposed here offer new alternatives of conventional transparent conductive materials based on either polymers or indium oxides; and pose scaleable production of cost-effective transparent electronics.
    Original languageEnglish
    Pages (from-to)4336-4340
    JournalPhysica Status Solidi B: Basic Research
    Volume244
    Issue number11
    DOIs
    Publication statusPublished - 2007
    MoE publication typeA1 Journal article-refereed

    Keywords

    • 68.55.Nq
    • 72.80.Tm
    • 73.61.Ph
    • 78.66.Sq
    • 78.67.Ch
    • 81.15.-z

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