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Biodegradable inkjet-printed electrochromic display for sustainable short-lifecycle electronics

Pietsch, Manuel 1; Schlisske, Stefan 1; Held, Martin 1; Strobel, Noah 1; Wieczorek, Alexander 1; Hernandez-Sosa, Gerardo ORCID iD icon 1
1 Lichttechnisches Institut (LTI), Karlsruher Institut für Technologie (KIT)


The fabrication of electronics on the basis of biofriendly materials aims to counterbalance the negative trends conveyed by the short life-cycle of electronics. Furthermore, these materials open the possibility to develop optoelectronic technologies which will be in contact with the human body. In this work, we present an electrochromic display fabricated by resource- and energy-efficient digital printing techniques. The biodegradation of the device is certified under the ISO 14855 standard. The display comprises of a poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) electrochromic layer, a gelatin-based electrolyte and Au electrodes deposited on a cellulose di-acetate substrate. We investigate the impact of various naturally sourced ionic species on the ionic conductivity of the electrolyte and the figures of merit of the display. The printed devices show an electrochromic contrast of 32 ± 4% and switching times of 3.0 ± 1.4 s, comparable to the spincoated reference devices. The utilization of inkjet printing enables the fabrication of different device designs with individually addressable pixels. The display can be worn innocuously on the skin without loss of performance thanks to the self-adhesion properties of the gelatin hydrogel. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000129394
Veröffentlicht am 05.02.2021
DOI: 10.1039/d0tc04627b
Zitationen: 37
Zitationen: 40
Cover der Publikation
Zugehörige Institution(en) am KIT Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 21.12.2020
Sprache Englisch
Identifikator ISSN: 2050-7526, 2050-7534
KITopen-ID: 1000129394
Erschienen in Journal of materials chemistry / C
Verlag Royal Society of Chemistry (RSC)
Band 8
Heft 47
Seiten 16716–16724
Nachgewiesen in Dimensions
Web of Science
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