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Electrochromism

About: Electrochromism is a research topic. Over the lifetime, 13097 publications have been published within this topic receiving 294637 citations.


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Journal ArticleDOI
TL;DR: In this paper, the authors discuss electrochromic coatings for potential use on smart windows with dynamic control of radiant energy and investigate crystalline WO 3 -based films by computations aimed at assessing their performance limits and amorphous WO3-based films with regard to their practical performance in contact with liquid or solid electrolytes.

73 citations

Journal ArticleDOI
TL;DR: In this paper, the top surface of the polypyrrole doped with dodecylbenzenesulfonate, PPy(DBS) is covered by a transparent ion barrier.
Abstract: Lateral ion transport in conjugated polymer films is studied using a special experimental geometry in which the top surface of the film is covered by a transparent ion barrier. Because of the barrier, when the oxidation level of the polymer is switched electrochemically, charge-compensating ions can only enter and leave the polymer from the edges. Since conjugated polymers are electrochromic, the color of the film changes during switching, and this can be monitored to provide information on the oxidation level of different parts of the film. Since the oxidation level cannot change until the cations arrive, the color also directly maps the positions of the cations. This geometry was employed to study cation transport in polypyrrole doped with dodecylbenzenesulfonate, PPy(DBS). Upon reduction, the ions travel in a front from the edges to the center of the film. During the first-ever reduction, this cation front stays sharp, but in subsequent reduction scans the front moves 20−30 times faster and broadens as...

73 citations

Journal ArticleDOI
TL;DR: In this paper, high transparent TiO2 nanoparticles are used as a non-electrochromic (non-EC) charge balancing layer for a high color contrast, bistable electrochromic window (ECW).
Abstract: Highly transparent TiO2 nanoparticles are explored as a non-electrochromic (non-EC) charge-balancing layer for a high color contrast, bistable electrochromic window (ECW). The TiO2 nanoparticle (TNP) layer increases the potential at the EC polymer electrode, thereby lowering the working voltage of the ECW. This leads to lower the power consumption of ECWs without loss in the high color contrast (ΔT > 72%) and to remarkably improve the cyclability (ΔT change 2.7 h, 40% increase) and UV stability (ΔT change <1%) to provide a low-power automatic ECW. This finding shows that the charge balanced ECP window has the potential to be used for an energy saving ECW with low-power consumption and will be widely applied in various ECWs as well as electrochemical devices with multiple functions.

73 citations

Journal ArticleDOI
TL;DR: This study investigated the proton-transport nature of a zirconium(IV) MOF, MOF-808, which shows striking proton conductivity and shows promising applications as alternative PEMs in diverse electrochemical devices.
Abstract: Proton-exchange membranes (PEMs) as separators have important technological applications in electrochemical devices, including fuel cells, electrochemical sensors, electrochemical reactors, and electrochromic displays. The composite membrane of a proton-conducting metal–organic framework (MOF) and an organic polymer combines the unique physical and chemical nature of the polymer and the high proton conductivity of the MOF, bringing together the best of both components to potentially fabricate high-performance PEMs. In this study, we have investigated the proton-transport nature of a zirconium(IV) MOF, MOF-808 (1). This superior-water-stability MOF shows striking proton conductivity with σ = 7.58 × 10–3 S·cm–1 at 315 K and 99% relative humidity. The composite membranes of 1 and poly(vinylidene fluoride) (PVDF) have further been fabricated and are labeled as 1@PVDF-X, where X represents the mass percentage of 1 (as X%) in 1@PVDF-X and X = 10–55%. The composite membranes exhibit good mechanical features and ...

73 citations

Journal ArticleDOI
TL;DR: Nickel oxide/polypyrrole (NiO/PPy) thin films were deposited by a two-step process in which the NiO layer was electrodeposited potentiostatically from an aqueous solution of NiCl2·6H2O at pH 7.5 on fluorine doped tin oxide (FTO) coated conducting glass substrates, followed by the deposition of polypyr role (PPy), by chemical bath deposition (CBD) from pyrrole mixed with ammonium persulfate (APS) as mentioned in this paper.

73 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023458
2022833
2021538
2020712
2019744
2018770