Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance upgrade on Thursday 4th of May 2017 from 8.00am to 9.00am (BST).

During this time our websites will be offline temporarily. If you have any questions please use the feedback button on this page. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 41, 2016
Previous Article Next Article

Freestanding electrochromic paper

Author affiliations

Abstract

Electrochromic displays based on conducting polymers exhibit higher contrasts and are cheaper, faster, more durable, and easier to synthesize as well as to process than their non-polymeric counterparts. However, current devices are typically based on thin electrochromic layers on top of a reflecting surface, which limits the thickness of the polymer layer to a few hundred nanometers. Here, we embed a light-scattering material within the electrochromic material to achieve a freestanding electrochromic paper-like electrode (50 to 500 μm). The device is based on a cellulose composite combining PEDOT:PSS as the electrochromic material and TiO2 nanoparticles as the reflecting material. Owing to the excellent refractive properties of TiO2, this nanocomposite is white in the neutral state and, when reduced, turns blue resulting in a color contrast around 30. The composite has a granular morphology and, as shown by AFM, an intermingling of TiO2 and PEDOT:PSS at the surface. Variation of the amount of TiO2 within the composite material is shown to result in a trade-off in optical and electrical properties. A proof-of-concept freestanding electrochromic device was fabricated by casting all layers successively to maximize the interlayer conformation. This freestanding device was found to be stable for over 100 cycles when ramped between 3 and −3 V.

Graphical abstract: Freestanding electrochromic paper

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 16 Aug 2016, accepted on 18 Sep 2016 and first published on 20 Sep 2016


Article type: Paper
DOI: 10.1039/C6TC03542F
Citation: J. Mater. Chem. C, 2016,4, 9680-9686
  •   Request permissions

    Freestanding electrochromic paper

    A. Malti, R. Brooke, X. Liu, D. Zhao, P. Andersson Ersman, M. Fahlman, M. P. Jonsson, M. Berggren and X. Crispin, J. Mater. Chem. C, 2016, 4, 9680
    DOI: 10.1039/C6TC03542F

Search articles by author