Cellulose-Based Ionogels for Paper Electronics

Stefan Thiemann, Swetlana J. Sachnov, Fredrik Pettersson, Roger Bollström, Ronald Österbacka, Peter Wasserscheid, Jana Zaumseil

    Research output: Contribution to journalArticleScientificpeer-review

    147 Citations (Scopus)


    A new class of biofriendly ionogels produced by gelation of microcellulose thin films with tailored 1-ethyl-3-methylimidazolium methylphosphonate ionic liquids are demonstrated. The cellulose ionogels show promising properties for application in flexible electronics, such as transparency, flexibility, transferability, and high specific capacitances of 5 to 15 mu F cm(-2). They can be laminated onto any substrate such as multilayer-coated paper and act as high capacitance dielectrics for inorganic (spray-coated ZnO and colloidal ZnO nanorods) and organic (poly[3-hexylthiophene], P3HT) electrolyte-gated field-effect transistors (FETs), that operate at very low voltages (<2 V). Field-effect mobilities in ionogel-gated spray-coated ZnO FETs reach 75 cm(2) V-1 s(-1) and a typical increase of mobility with decreasing specific capacitance of the ionogel is observed. Solution-processed, colloidal ZnO nanorods and laminated cellulose ionogels enable the fabrication of the first electrolyte-gated, flexible circuits on paper, which operate at bending radii down to 1.1 mm.
    Original languageUndefined/Unknown
    Pages (from-to)625–634
    Number of pages10
    JournalAdvanced Functional Materials
    Issue number5
    Publication statusPublished - 2014
    MoE publication typeA1 Journal article-refereed


    • ZnO
    • ion modulation
    • nanorods
    • Nano cellulose

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