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Cellulose‐Based Ionogels for Paper Electronics
Author(s) -
Thiemann Stefan,
Sachnov Swetlana J.,
Pettersson Fredrik,
Bollström Roger,
Österbacka Ronald,
Wasserscheid Peter,
Zaumseil Jana
Publication year - 2014
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201302026
Subject(s) - materials science , nanorod , electrolyte , flexible electronics , ionic liquid , capacitance , nanotechnology , fabrication , cellulose , organic electronics , chemical engineering , transistor , printed electronics , thin film transistor , substrate (aquarium) , composite material , voltage , electrode , layer (electronics) , organic chemistry , oceanography , geology , alternative medicine , chemistry , pathology , engineering , quantum mechanics , catalysis , medicine , physics , inkwell
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 μF 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.