Complementary hybrid electrodes for high contrast electrochromic devices with fast response.

Autor:	Kortz C; Technische Universität Kaiserslautern, Erwin-Schrödinger-St. 46, 67663, Kaiserslautern, Germany., Hein A; Technische Universität Kaiserslautern, Erwin-Schrödinger-St. 46, 67663, Kaiserslautern, Germany., Ciobanu M; University of Osnabrück, Barbarastrasse 7, 49074, Osnabrück, Germany., Walder L; University of Osnabrück, Barbarastrasse 7, 49074, Osnabrück, Germany., Oesterschulze E; Technische Universität Kaiserslautern, Erwin-Schrödinger-St. 46, 67663, Kaiserslautern, Germany. oester@rhrk.uni-kl.de.
Jazyk:	angličtina
Zdroj:	Nature communications [Nat Commun] 2019 Oct 25; Vol. 10 (1), pp. 4874. Date of Electronic Publication: 2019 Oct 25.
DOI:	10.1038/s41467-019-12617-4
Abstrakt:	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.
Databáze:	MEDLINE
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