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Complementary hybrid electrodes for high contrast electrochromic devices with fast response

Fast switching ‘transparent-to-black’ electrochromic devices are currently under investigation as potential candidates in modern applications like e-papers or with additional functionality as ultracompact iris or switchable neutral filter in camera systems. However, recent electrochromic devices sho...

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Autores principales: Kortz, Carsten, Hein, Alexander, Ciobanu, Marius, Walder, Lorenz, Oesterschulze, Egbert
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6814761/
https://www.ncbi.nlm.nih.gov/pubmed/31653835
http://dx.doi.org/10.1038/s41467-019-12617-4
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author Kortz, Carsten
Hein, Alexander
Ciobanu, Marius
Walder, Lorenz
Oesterschulze, Egbert
author_facet Kortz, Carsten
Hein, Alexander
Ciobanu, Marius
Walder, Lorenz
Oesterschulze, Egbert
author_sort Kortz, Carsten
collection PubMed
description Fast switching ‘transparent-to-black’ electrochromic devices are currently under investigation as potential candidates in modern applications like e-papers or with additional functionality as ultracompact iris or switchable neutral filter in camera systems. However, recent electrochromic devices show either a lack of contrast or slow response times. To overcome these deficiencies we focus on a careful material composition of the colouring hybrid electrodes in our device. We have established a nanoporous Sb-doped SnO[Formula: see text] electrode as supporting electrode for chemisorbed electrochromic tetraphenylbenzidine molecules due to its good conductivity in the redox potential range of the molecule. This hybrid electrode was combined with a modified nanoporous TiO[Formula: see text] / viologen electrode to realize a high performance, complementary electrochromic device. Fast switching time constants of 0.5 s and concurrently high change in optical density [Formula: see text] OD = 2.04 at 605 nm confirm our successful concept. The achieved colouration efficiency of 440 cm[Formula: see text] C[Formula: see text] exceeds every high contrast device presented so far.
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spelling pubmed-68147612019-10-28 Complementary hybrid electrodes for high contrast electrochromic devices with fast response Kortz, Carsten Hein, Alexander Ciobanu, Marius Walder, Lorenz Oesterschulze, Egbert Nat Commun Article Fast switching ‘transparent-to-black’ electrochromic devices are currently under investigation as potential candidates in modern applications like e-papers or with additional functionality as ultracompact iris or switchable neutral filter in camera systems. However, recent electrochromic devices show either a lack of contrast or slow response times. To overcome these deficiencies we focus on a careful material composition of the colouring hybrid electrodes in our device. We have established a nanoporous Sb-doped SnO[Formula: see text] electrode as supporting electrode for chemisorbed electrochromic tetraphenylbenzidine molecules due to its good conductivity in the redox potential range of the molecule. This hybrid electrode was combined with a modified nanoporous TiO[Formula: see text] / viologen electrode to realize a high performance, complementary electrochromic device. Fast switching time constants of 0.5 s and concurrently high change in optical density [Formula: see text] OD = 2.04 at 605 nm confirm our successful concept. The achieved colouration efficiency of 440 cm[Formula: see text] C[Formula: see text] exceeds every high contrast device presented so far. Nature Publishing Group UK 2019-10-25 /pmc/articles/PMC6814761/ /pubmed/31653835 http://dx.doi.org/10.1038/s41467-019-12617-4 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Kortz, Carsten
Hein, Alexander
Ciobanu, Marius
Walder, Lorenz
Oesterschulze, Egbert
Complementary hybrid electrodes for high contrast electrochromic devices with fast response
title Complementary hybrid electrodes for high contrast electrochromic devices with fast response
title_full Complementary hybrid electrodes for high contrast electrochromic devices with fast response
title_fullStr Complementary hybrid electrodes for high contrast electrochromic devices with fast response
title_full_unstemmed Complementary hybrid electrodes for high contrast electrochromic devices with fast response
title_short Complementary hybrid electrodes for high contrast electrochromic devices with fast response
title_sort complementary hybrid electrodes for high contrast electrochromic devices with fast response
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6814761/
https://www.ncbi.nlm.nih.gov/pubmed/31653835
http://dx.doi.org/10.1038/s41467-019-12617-4
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