Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/33207
Title: Inkjet Printing of PEDOT:PSS Based Conductive Patterns for 3D Forming Applications
Authors: BASAK, Indranil 
NOWICKI, Gudrun 
RUTTENS, Bart 
DESTA, Derese 
PROOTH, Jeroen 
JOSE, Manoj 
NAGELS, Steven 
BOYEN, Hans-Gerd 
D'HAEN, Jan 
BUNTINX, Mieke 
DEFERME, Wim 
Issue Date: 2020
Publisher: MDPI
Source: Polymers, 12 (12) (Art N° 2915)
Abstract: This paper presents the formulation, inkjet printing, and vacuum forming of a conductive and stretchable polymer, poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), ink on a stretchable and transparent thermoplastic polyurethane (TPU) substrate. The formulation of the conductive and stretchable ink is achieved by combining PEDOT:PSS with additional solvents, to achieve the right inkjet properties for drop-on-demand (DoD) inkjet printing. A conductive pattern can be printed from the 21 µm orifice on a flexible and stretchable TPU substrate, with a linewidth down to 44 µm. The properties of the printed pattern, in terms of sheet resistance, morphology, transparency, impact of weather conditions, and stretching are investigated and show sheet resistances up to 45 Ohm/sq and transparencies as high as 95%, which is comparable to indium tin oxide (ITO). Moreover, in contrast to ITO, one-time stretching up to 40% can be achieved, increasing the sheet resistance up to 214 Ohm/sq only, showing the great potential of this ink for one-time stretching. Finally, as a proof of this one-time stretching, the printed samples are vacuum formed around a 3D object, still showing sufficient conductivity to be applied as a capacitive touch sensor.
Keywords: inkjet printing;stretchable electronics;3D forming of touch sensor
Document URI: http://hdl.handle.net/1942/33207
e-ISSN: 2073-4360
DOI: 10.3390/polym12122915
ISI #: WOS:000602399100001
Rights: © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Category: A1
Type: Journal Contribution
Validations: ecoom 2022
Appears in Collections:Research publications

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