scholarly journals Optimized ion diffusion depth for maximizing optical contrast of environmentally friendly PEDOT:PSS electrochromic devices

2016 ◽  
Vol 6 (10) ◽  
pp. 3127 ◽  
Author(s):  
Joo Yeon Kim ◽  
Ji-Young Oh ◽  
Sanghoon Cheon ◽  
Hyunkoo Lee ◽  
Jonghee Lee ◽  
...  
Keyword(s):  
Environmentally Friendly ◽  
Ion Diffusion ◽  
Electrochromic Devices ◽  
Optical Contrast ◽  
Diffusion Depth

scholarly journals In situ wide-field visualization of palladium hydrogenation

2020 ◽  
Author(s):  
Chongjun Jin ◽  
Nicholas Fang ◽  
Xiaoyi She ◽  
Huifeng Du ◽  
Yang Shen ◽  
...  
Keyword(s):  
Real Time ◽  
Hydrogen Diffusion ◽  
Fast Response ◽  
Wide Field ◽  
Ion Diffusion ◽  
Optical Contrast ◽  
Self Organized ◽  
Transmission Electron ◽  
Kinetics Of

Abstract Visualizing hydrogenation processes in metals in real-time is important to various hydrogen-involved applications. However, observing hydrogen diffusion was limited by transmission electron microscopy, and the kinetics of hydrogenation in the interior of the metals was not reported. Here we proposed an optical microscopy-based visualization of palladium hydrogenation from diffusion surface to the interior by introducing a fast-response mechanical platform that transforms the hydrogen diffusion into self-organized ordered wrinkles with sharp optical contrast. This platform is an Au/Pd double layer on elastomer which results in directional hydrogenation from sidewall to the interior. The kinetics of hydrogenation in the interior of the palladium along the diffusion direction was monitored in real-time. This platform will enable in-situ visualization of atom/ion diffusion on metals that are crucial in energy storage and hydrogen detection.

Carbon Nanotubes-Assisted Fabrication of TiO2 Nanocomposite Film for Optimum Electrochromic Application

2014 ◽  
Vol 989-994 ◽  
pp. 789-792
Author(s):  
Shu Ping Liu ◽  
Wei Wang ◽  
Lin Lin Cui ◽  
Hua Nan Guan
Keyword(s):  
Carbon Nanotubes ◽  
Self Assembly ◽  
Multilayer Film ◽  
Great Promise ◽  
Layer By Layer ◽  
Electrochromic Devices ◽  
Optical Contrast ◽  
Coloration Efficiency ◽  
Assembly Method

Electrochromic composite film consisting of TiO2, chitosan (CS) and carbon nanotubes (CNTs) were fabricated on quartz and FTO substrates by the layer-by-layer self-assembly method (LbL). The multilayer film was characterized by UV-vis spectrum, scanning electron microscopy (SEM), cyclic voltammetry (CV) and chronoamperometric (CA) and in situ spectral electrochemicalmeasurements. The composite material shows high electrochromic performance, with the optical contrast of 11.5% and coloration efficiency of 21.7 cm2/C at 800 nm. The results indicate great promise for the TiO2-based film as a potential material in electrochromic devices.

High performance electrochromic devices based on a polyindole derivative, poly(1H-benzo[g]indole)

2015 ◽  
Vol 3 (43) ◽  
pp. 11318-11325 ◽  
Author(s):  
Guangming Nie ◽  
Ling Wang ◽  
Changlong Liu
Keyword(s):  
Response Time ◽  
High Performance ◽  
Optical Memory ◽  
Fast Response ◽  
Electrochromic Devices ◽  
Optical Contrast ◽  
Fast Response Time ◽  
Coloration Efficiency ◽  
Long Term Stability

An ECD based on electrochromic poly(1H-benzo[g]indole) was fabricated. The color of this ECD can switch between green and navy blue with good optical contrast, high coloration efficiency, fast response time, better optical memory and long-term stability.

scholarly journals Mixed-Valence Compounds as a New Route for Electrochromic Devices with High Coloration Efficiency in the Whole Vis-NIR Region

2020 ◽  
Vol 10 (23) ◽  
pp. 8372
Author(s):  
Giuseppina Anna Corrente ◽  
Sante Cospito ◽  
Agostina Lina Capodilupo ◽  
Amerigo Beneduci
Keyword(s):  
Color Change ◽  
Light Transmission ◽  
Mixed Valence ◽  
Research Field ◽  
Visible Range ◽  
Species Replacement ◽  
Electrochromic Devices ◽  
Optical Contrast ◽  
Absorption Bands ◽  
Mixed Valence Compounds

Electrochromic devices (ECDs) that allow the modulation of light transmission are very attractive in the research field of energy saving. Here all-in-one gel switchable ECDs based on mixed-valence electroactive compounds were developed. The use of the thienoviologen/ferrocene couple as cathode and anode, respectively, leads to a significant electrochromic band in the visible range (550–800 nm), with a color change from yellow to green, and to a lower band in the NIR region (1000–1700 nm), due to the presence of one electroactive-chromic species. Replacement of the electroactive ferrocene with a fluorene-diarylamine electroactive-chromic species, allows to extend and intensify the absorption in the NIR region, thus affording modulation of the solar radiation from 500 up to 2200 nm. High optical contrast, fast coloration and bleaching times and outstanding coloration efficiencies were measured for all observed absorption bands upon the application of small potential differences (1.4 V < DV < 2 V).

scholarly journals Large‐Area Electrochromic Devices on Flexible Polymer Substrates with High Optical Contrast and Enhanced Cycling Stability

2020 ◽  
pp. 2000836
Author(s):  
Sven Macher ◽  
Marco Schott ◽  
Martin Dontigny ◽  
Abdelbast Guerfi ◽  
Karim Zaghib ◽  
...  
Keyword(s):  
Cycling Stability ◽  
Electrochromic Devices ◽  
Large Area ◽  
Optical Contrast ◽  
Polymer Substrates ◽  
Flexible Polymer

scholarly journals MgF2 as abundant and environmentally friendly electrolytes for high performance electrochromic devices

2021 ◽  
Author(s):  
Xi Chen ◽  
Wenjie Li ◽  
Shuliang Dou ◽  
Lebin Wang ◽  
Yingming Zhao ◽  
...  
Keyword(s):  
High Performance ◽  
Environmentally Friendly ◽  
Electrochromic Devices

scholarly journals Iron (II) Metallo-Supramolecular Polymers Based on Thieno[3,2-b]thiophene for Electrochromic Applications

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 362
Author(s):  
Andrei Chernyshev ◽  
Udit Acharya ◽  
Jiří Pfleger ◽  
Olga Trhlíková ◽  
Jiří Zedník ◽  
...  
Keyword(s):  
Indium Tin Oxide ◽  
Supramolecular Polymers ◽  
Electrochromic Devices ◽  
Optical Contrast ◽  
Spin Casting ◽  
Atomic Force ◽  
Vis Spectroscopy ◽  
Ito Glass ◽  
End Groups ◽  
Excellent Candidate

Four new bis(tpy) unimers with different linkers between the thieno[3,2-b]thiophene-2,5-diyl central unit and terpyridine-4′-yl (tpy) end-groups: no linker (Tt), ethynediyl (TtE), 1,4-phenylene (TtPh) and 2,2′-bithophene-5,5′-diyl (TtB) are prepared, characterized, and assembled with Fe2+ ions to metallo-supramolecular polymers (Fe-MSPs). The Fe-MSP films prepared by spin-casting on Indium Tin Oxide (ITO) glass are characterized by atomic force microscope (AFM) microscopy, cyclic voltammetry, and UV/vis spectroscopy and studied for their electrochromism and effect of the unimer structure on their electrochromic performance. Of the studied MSPs, Fe-Tt shows the highest optical contrast as well as coloration efficiency (CE = 641 cm2 C−1) and the fastest optical response. This makes it an excellent candidate for possible use in electrochromic devices.

Facile preparation of aqueous suspensions of WO3/sulfonated PEDOT hybrid nanoparticles for electrochromic applications

2016 ◽  
Vol 52 (60) ◽  
pp. 9379-9382 ◽  
Author(s):  
Han Ling ◽  
Guoqiang Ding ◽  
Daniel Mandler ◽  
Pooi See Lee ◽  
Jianwei Xu ◽  
...  
Keyword(s):  
Aqueous Suspension ◽  
Electrochemical Stability ◽  
Hybrid Nanoparticles ◽  
Electrochromic Devices ◽  
Optical Contrast ◽  
Aqueous Suspensions ◽  
Facile Preparation

An aqueous suspension of WO3/PEDTS nanoparticles is facilely prepared, giving the hybrid electrochromic devices an enhanced optical contrast and electrochemical stability.

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