Consecutive anchoring of symmetric viologens: Electrochromic devices providing colorless to neutral-color switching

2018 ◽  
Vol 177 ◽  
pp. 110-119 ◽  
Author(s):  
Yolanda Alesanco ◽  
Ana Viñuales ◽  
Joseba Ugalde ◽  
Eneko Azaceta ◽  
Germán Cabañero ◽  
...  
Keyword(s):  
Electrochromic Devices ◽  
Color Switching

All-in-one, reversible yellow-green color switching tungsten oxide electrochromic devices

2020 ◽  
Vol 384 (32) ◽  
pp. 126822
Author(s):  
Zhichao Xue ◽  
Qiang Li ◽  
Mingfu Yu ◽  
Ying Lv ◽  
Hong Sun ◽  
...  
Keyword(s):  
Tungsten Oxide ◽  
Electrochromic Devices ◽  
Green Color ◽  
Color Switching

Self-powered quasi-solid-state electrochromic devices for optical information encryption

2021 ◽  
Author(s):  
Feifei Zhao ◽  
Jingmei Zhao ◽  
Yun Zhang ◽  
Xu Wang ◽  
Wenshou Wang
Keyword(s):  
Solid State ◽  
Bilayer Film ◽  
Optical Information ◽  
Electrochromic Devices ◽  
Switching Performance ◽  
External Power ◽  
Self Powered ◽  
Color Switching ◽  
High Flexibility ◽  
Excellent Color

A new self-powered quasi-solid-state ECD with a simplified bilayer film configuration shows high flexibility and excellent color switching performance without external power supply. Its application in optical information encryption is demonstrated.

scholarly journals Fabrication of All-Solid Organic Electrochromic Devices on Absorptive Paper Substrates Utilizing a Simplified Lateral Architecture

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4839
Author(s):  
Guodong Liu ◽  
Yu Liu ◽  
Meiyun Zhang ◽  
Fredrik Pettersson ◽  
Martti Toivakka
Keyword(s):  
Electrochemical Properties ◽  
Solid Electrolyte ◽  
High Resistance ◽  
Color Contrast ◽  
Electrochromic Devices ◽  
Functional Layer ◽  
Switching Dynamics ◽  
Film Forming ◽  
Electrochromic Material ◽  
Color Switching

Poly(3,4-ethylenedioxythiophene) doped with the polymer anion poly(styrenesulfonate), PEDOT:PSS, is a common electrochromic material used in the preparation of electrochromic devices (ECDs). In this paper, the PEDOT:PSS doped with a solvent was used both as the electrode and the electrochromic functional layer for fabrication of ECDs on absorptive paper surfaces. The doped PEDOT:PSS dispersion was assessed for the film-forming evenness, sheet resistance and conductivity, and the performance of prepared ECDs for their color contrast and switching dynamics. The ECD performance is discussed in relation to the absorptive characteristics of the substrates. The results indicate that it is feasible to prepare ECDs onto absorptive substrates, despite the partial polymer material imbibition into them. The extent of polymer absorption influences the ECD performance: an increased absorption reduces the color contrast but speeds up the color switching. The electrochemical properties of the used solid electrolyte were found to be crucial for functioning of the ECDs. Insufficient ion transport and associated high resistance led to failure of the devices.

Preparation, Electronic Structure and Optical Properties of the Electrochromic Thin Films

2004 ◽  
Vol 9 (4) ◽  
pp. 363-372 ◽  
Author(s):  
T. Lukaszewicz ◽  
A. Ravinski ◽  
I. Makoed
Keyword(s):  
Electrochromic Device ◽  
Orbital Method ◽  
Optical Parameters ◽  
Full Potential ◽  
Electrochromic Devices ◽  
Energy Bands ◽  
Conducting Film ◽  
Recombination Probability ◽  
Transparent Conducting ◽  
Smoluchowski Equations

A new multilayer electrochromic device has been constructed according to the following pattern: glass1/ITO/WO3/gel electrolyte/BP/ITO/glass2, where ITO is a transparent conducting film made of indium and tin oxide and with the surface resistance equal 8–10 Ω/cm2 . The electrochromic devices obtained in the research are characterized by great (considerable) transmittance variation between coloration and bleaching state (25–40% at applied voltage of 1.5 to 3 V), and also high coloration efficiency (above 100 cm2 /C). Selfconsistent energy bands, dielectric permittivity and optical parameters are calculated using a full-potential linear muffin-tin orbital method. The numerical solution of the Debye-Smoluchowski equations is developed for simulating recombination probability of Li+ ions in amorphous electrolyte.

Síntesis sencilla de óxido de tungsteno(VI) a partir del filamento de un foco

2011 ◽  
Vol 19 (4) ◽  
pp. 341
Author(s):  
Joel Díaz Reyes ◽  
Aarón Pérez-Benítez ◽  
Valentín Dorantes
Keyword(s):  
Infrared Spectroscopy ◽  
High Temperatures ◽  
Power Supply ◽  
Light Bulb ◽  
Electrochromic Devices ◽  
Tungsten Filament ◽  
Tungsten Oxides ◽  
Ac Power

<span>Tungsten(VI) oxide can be easily synthesized starting from a standard light bulb. The reaction consists in the oxidation at high temperatures (T ≈ 2000 – 3000° C) of a tungsten filament in presence of air; conditions which can be easily achieved by connecting a broken light bulb (but with its intact filament) to an AC-power supply of 110 volts. The vapor of WO3 is condensed into a beaker in a quantity enough to be characterized by infrared spectroscopy. The experiment is very funny, inexpensive and allows to the teacher to link several topics in current chemistry and physics of the tungsten oxides, such as their nomenclature and technological applications (i.e. electrochromic devices, gasochromic sensors, superalloys or as it is used in home: As a “simple” emisor of light!).</span>

A review on fabrication processes for electrochromic devices

2016 ◽  
Vol 3 (4) ◽  
pp. 397-421 ◽  
Author(s):  
Sung-Ik Park ◽  
Ying-Jun Quan ◽  
Se-Heon Kim ◽  
Hyungsub Kim ◽  
Sooyeun Kim ◽  
...  
Keyword(s):  
Electrochromic Devices

Fabrication of WO3 electrochromic devices using electro-exploding wire techniques and spray coating

2021 ◽  
Vol 223 ◽  
pp. 110960
Author(s):  
Chi-Ming Chang ◽  
Ya-Chen Chiang ◽  
Ming-Hsiang Cheng ◽  
Shiuan-Huei Lin ◽  
Wen-Bin Jian ◽  
...  
Keyword(s):  
Spray Coating ◽  
Electrochromic Devices ◽  
Exploding Wire

scholarly journals An approach to emerging optical and optoelectronic applications based on NiO micro- and nanostructures

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
María Taeño ◽  
David Maestre ◽  
Ana Cremades
Keyword(s):  
Gas Sensors ◽  
High Frequency ◽  
Future Research ◽  
Electrochromic Devices ◽  
Fuel Cell Electrodes ◽  
Magnetic Devices ◽  
Optical Microresonators ◽  
Optical Limiters ◽  
Recent Developments ◽  
Potential Applicability

Abstract Nickel oxide (NiO) is one of the very few p-type semiconducting oxides, the study of which is gaining increasing attention in recent years due to its potential applicability in many emerging fields of technological research. Actually, a growing number of scientific works focus on NiO-based electrochromic devices, high-frequency spintronics, fuel cell electrodes, supercapacitors, photocatalyst, chemical/gas sensors, or magnetic devices, among others. However, less has been done so far in the development of NiO-based optical devices, a field in which this versatile transition metal oxide still lags in performance despite its potential applicability. This review could contribute with novelty and new forefront insights on NiO micro and nanostructures with promising applicability in optical and optoelectronic devices. As some examples, NiO lighting devices, optical microresonators, waveguides, optical limiters, and neuromorphic applications are reviewed and analyzed in this work. These emerging functionalities, together with some other recent developments based on NiO micro and nanostructures, can open a new field of research based on this p-type material which still remains scarcely explored from an optical perspective, and would pave the way to future research and scientific advances.

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