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Greyscale and Paper Electrochromic Polymer Displays by UV Patterning

1
Laboratory of Organic Electronics, Department of Science and Technology, Linkoping University, SE-601 74 Norrkoping, Sweden
2
RISE Acreo, ICT Department, Printed Electronics, Research Institutes of Sweden, Acreo, 601 17 Norrkoping, Sweden
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(2), 267; https://doi.org/10.3390/polym11020267
Received: 14 December 2018 / Revised: 23 January 2019 / Accepted: 25 January 2019 / Published: 5 February 2019
(This article belongs to the Special Issue Electrochromic Polymers)
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Abstract

Electrochromic devices have important implications as smart windows for energy efficient buildings, internet of things devices, and in low-cost advertising applications. While inorganics have so far dominated the market, organic conductive polymers possess certain advantages such as high throughput and low temperature processing, faster switching, and superior optical memory. Here, we present organic electrochromic devices that can switch between two high-resolution images, based on UV-patterning and vapor phase polymerization of poly(3,4-ethylenedioxythiophene) films. We demonstrate that this technique can provide switchable greyscale images through the spatial control of a UV-light dose. The color space was able to be further altered via optimization of the oxidant concentration. Finally, we utilized a UV-patterning technique to produce functional paper with electrochromic patterns deposited on porous paper, allowing for environmentally friendly electrochromic displays. View Full-Text
Keywords: conductive polymers; PEDOT; patterning; electrochromic; electrochromic displays; paper displays; digital cellulose; cellulose; paper electronics; electrochromism; vapor phase polymerization conductive polymers; PEDOT; patterning; electrochromic; electrochromic displays; paper displays; digital cellulose; cellulose; paper electronics; electrochromism; vapor phase polymerization
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Brooke, R.; Edberg, J.; Crispin, X.; Berggren, M.; Engquist, I.; Jonsson, M.P. Greyscale and Paper Electrochromic Polymer Displays by UV Patterning. Polymers 2019, 11, 267.

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