Electrochromism and electrochromic materials for displays

Monk, Paul

doi:10.1016/b978-012513745-4/50059-7

Cited by 9 publications

(5 citation statements)

References 475 publications

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“…One of the electrodes must be functional and demonstrate switchable behavior, and another electrode is auxiliary and mainly serves as a means to apply potential. 1 Among such devices, the so called switchable mirrors or smart optical windows based on rare earth metal hydrides have recently attracted much attention. 2 In this system, the active electrode ͑cath-ode͒ is made of a thin layer of yttrium Y or another appropriate metal/alloy; an auxiliary electrode ͑anode͒ can be any transparent conductive electrode.…”

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confidence: 99%

Electrochemistry of the Indium-Tin Oxide Electrode in 1 M NaOH Electrolyte

Matveeva

2005

J. Electrochem. Soc.

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Electrochemical behavior of the bare indium-tin oxide ͑ITO͒ electrode in 1 M NaOH electrolyte has been studied in a wide range of current density and applied charge in view of its possible application as a counterelectrode in rare earth optical windows. Nature and kinetics of both cathodic and anodic processes developed on ITO depend on electrolyte composition as well as on transformations occurring with the electrode. Contribution of oxygen vacancies and ions O 2− is crucial for the electrochemical behavior of ITO. At the cathodic polarization, the electrode components are deeply reduced so that ITO is gradually and irreversibly converted to a metallic mirror with a noticeable decrease of oxygen content. At high anodic current density, the ITO electrode undergoes modifications and its conductivity decreases probably also due to the change of oxygen content in the oxides lattice. A phenomenological description of all the processes involved in ITO electrochemical performance and their reversibility is proposed and discussed. A stable operation of ITO in electrochemical devices can be achieved only in the case of usage of external RedOx dissolved in the electrolyte or deposited on the ITO electrode. Such active components could be selected from the different systems studied for flat panel displays.

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confidence: 99%

Electrochemistry of the Indium-Tin Oxide Electrode in 1 M NaOH Electrolyte

Matveeva

2005

J. Electrochem. Soc.

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“…A high contrast ratio is desirable for devices such as displays so that images and text can be viewed easily. [136,137] Although lower values may be useful to obtain effects such as depth and shadow. When quoting the value of contrast ratio for material it is important to explain the details of the experimental conditions.…”

Section: The Most Important Characteristic Parameters Of Ec Systemsmentioning

confidence: 99%

Fundamentals and Advances of Electrochromic Systems: A Review

Isfahani

Silva

2021

Adv Eng Mater

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Electrochromic (EC) materials as one of the known types of smart materials have found many applications and therefore have recently been considered by many researchers and industries. Herein, after classifying these materials based on various properties such as chemical structure, optical properties, color, and applications explains how the EC-based systems work. Also, by introducing the widely used analyses in this field along with the different parameters and properties derived from them, using different examples from previous research, discusses the principles and advances of EC. Guidelines for further investigations are outlined.

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“…Only the projections of the plot are shown for the sake of better visualization. Coloration efficiency (CE) represents the ratio of the area of electrochrome, color of which is intensified by unit absorbance and the charge passed [12] and is calculated following expression (1):…”

Section: Electrochemical Measurements From Chra and Chrc Experimentsmentioning

confidence: 99%

Thickness-Dependent Coloration Properties of Glass-Substrate Viologen-Based Electrochromic Devices

et al. 2012

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Blue viologen-based electrochromic devices on glass substrates were constructed with different internal active layer thickness by means of a thermoplastic spacer (DuPontTM surlyn1702). Optical measurements, chronoamperometry, and cyclic voltammetry (CV) were the techniques used for characterization. Coloration properties such as switching times for coloring and bleaching processes, coloration efficiency, and effective charge density, previously studied for a single device, are now obtained for several devices with different thicknesses. Dependence on thickness in the response times and in voltagedependent parameters of device equivalent electric circuit model was studied in previous works. In this paper, some of those parameters, such as Warburg diffusion, double-layer capacitance, and charge transfer resistance, obtained with electrochemical impedance spectroscopy, are related with the coloration properties and their dependence on the thickness obtained by the aforementioned chronoamperometric and CV characterization.

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Electrochromism and electrochromic materials for displays

Cited by 9 publications

References 475 publications

Electrochemistry of the Indium-Tin Oxide Electrode in 1 M NaOH Electrolyte

Electrochemistry of the Indium-Tin Oxide Electrode in 1 M NaOH Electrolyte

Fundamentals and Advances of Electrochromic Systems: A Review

Thickness-Dependent Coloration Properties of Glass-Substrate Viologen-Based Electrochromic Devices

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