Electrochromic Glasses with Separate Regulation of Transmission of Visible Light and Near-Infrared Radiation (Review)

Maiorov, V. A.

doi:10.1134/s0030400x19040143

Cited by 14 publications

(6 citation statements)

References 24 publications

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“…When the cations and electrons are extracted under a positive voltage, the film transits into a bleached state, appearing transparent. [ 49 ] The intercalation and extraction of M n + are generally limited to a very thin surface layer of the EC material, which strongly depends on its microstructure. [ 50 ] Thus, optimizing the microstructure of the materials is critical to improving their EC performance, as it will provide more active sites and increase the accessible intercalation sites, leading to a fast switching speed and high optical contrast.…”

Section: Inorganic Ec Materialsmentioning

confidence: 99%

Recent Advances on Dual‐Band Electrochromic Materials and Devices

Zhai

Shen

et al. 2022

Adv Funct Materials

109

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Dual-band electrochromism is a phenomenon where materials can independently regulate the transmittance of visible (VIS) and near-infrared (NIR) light. Owing to their bistability, low energy consumption, and independent control over VIS and NIR regions, dual-band electrochromic (EC) devices have been of great significance to fully harnessing VIS and NIR light and building an energy-saving society. The past several years have witnessed the efforts put in developing novel EC materials to improve their dual-band optical performance through altering their composition, structural, and physicochemical features, which determine the optical behavior of dual-band EC devices. In this review, the concept, significance, working principle, and key influence factors of dual-band electrochromism are briefly introduced. Next, the up-to-date progress of dual-band EC materials including inorganic, organic, and composites materials are summarized, with a focus on material design, device fabrication, and performance optimization. Finally, the challenges and perspectives of dual-band EC materials and devices are also presented.

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Section: Inorganic Ec Materialsmentioning

confidence: 99%

Recent Advances on Dual‐Band Electrochromic Materials and Devices

Zhai

Shen

et al. 2022

Adv Funct Materials

109

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“…The recent diffusion of studies regarding TiO 2 as a suitable cathodic EC layer has been reviewed by Maiorov et al [175]. As is well known, TiO 2 is a cheap and abundant material, is highly compatible with other materials, and is inert.…”

Section: Tio 2 In the Design Of Chromogenic Devices-general Considerationsmentioning

confidence: 99%

Titanium Dioxide in Chromogenic Devices: Synthesis, Toxicological Issues, and Fabrication Methods

2020

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The use of titanium dioxide (TiO2) within two specific classes of devices, namely electrochromic and photoelectrochromic, is described hereafter, with respect to its inherent properties and chromogenic features within architectures that have appeared so far, in this field. The new research trends, involving the applications of TiO2 in chromogenic materials are reported, with particular attention paid to the techniques used for film deposition as well as the synthesis of nanoparticles. Furthermore, the main studies concerning its chemical-physical properties and approaches to its chemical syntheses and fabrication are reviewed, with special regard to “green” routes. In addition, the main aspects relating to toxicological profiles are exposed, with reference to nanoparticles and thin films.

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“…We showed that devices based on FAF1 and FAF2 undergo EC transitions of their absorptions between the visible and near-infrared (NIR) regions of the spectrum, indicating their potential in many applications, such as optical attenuators in optical fiber communication, optical components, and thermal control. 43,44 These results emphasize that FAFs (and in the more general case, conjugated COFs) as a class of 2D materials are worth being considered as potential active layers for EC applications.…”

Section: Introductionmentioning

confidence: 98%

“…Considering the conjugated nature of 2D FAFs and the reasonable redox potentials of the materials and taking advantage of their excellent solubility, allowing fabrication of transparent homogeneous films by the spray-coating technique, we explored for the first time the electrochromic properties of two FAFs . We showed that devices based on FAF1 and FAF2 undergo EC transitions of their absorptions between the visible and near-infrared (NIR) regions of the spectrum, indicating their potential in many applications, such as optical attenuators in optical fiber communication, optical components, and thermal control. , These results emphasize that FAFs (and in the more general case, conjugated COFs) as a class of 2D materials are worth being considered as potential active layers for EC applications.…”

Section: Introductionmentioning

confidence: 99%

Soluble Two-Dimensional Donor–Acceptor Aza-Fused Aromatic Frameworks and their Electrochromism between the Visible and Near-Infrared Regions

et al. 2022

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Two-dimensional (2D) covalent fused-ring aromatic frameworks (FAFs) can be regarded as holey graphene and hold considerable potential in many applications. However, the development of such materials has been seriously limited by their poor solubility. In this work, four soluble 2D fused-ring aromatic frameworks, FAF1−FAF4, soluble in common organic solvents, were successfully synthesized by creating large pore structures and attaching long side-chain substituents. They possess high molecular weights (M w = 56,500−87,000 Da) and large hydrodynamic diameters (190−250 nm). Although FAFs are soluble in common organic solvents, they nevertheless show excellent ordering in the solid state with a layer spacing of ca. 0.36−0.37 nm, typical for π−π stacking. Due to the presence of electron-deficient pyrazine rings in the main skeleton and electron-rich alkoxyphenyl or alkylthienyl side-chain groups, these FAFs are electroactive in both n-and pdoping processes (E red = −(0.80−0.93) V, E ox = 0.84−0.94 V vs Fc/Fc + ). They possess low-lying lowest unoccupied molecular orbital (LUMO) energy levels of −(3.87−4.00) eV and narrow band gaps (E g CV = 1.64−1.87 eV), suggesting that they are good candidates as n-type semiconductors. Taking advantage of their good solubility, spray-coated films of FAF1 and FAF2 were prepared, and their cathodic electrochromic behavior in the ultraviolet−visible−near-infrared (UV−vis−NIR) region was investigated for the first time. The 2D framework with 4-(2-ethylhexyloxy)phenyl solubilizing groups, FAF1, demonstrated superior performance with short switching times between the neutral and n-doped states (few seconds), good contrast (ΔT up to 44%), high coloration efficiency (up to 171 cm 2 C −1 at 515 nm), and good operational stability (>200 redox cycles). We envisage that such a type of 2D fused-ring framework possessing good solubility and strong π−π interactions between the layers should be a promising material for a wide range of electronic and optoelectronic applications.

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Electrochromic Glasses with Separate Regulation of Transmission of Visible Light and Near-Infrared Radiation (Review)

Cited by 14 publications

References 24 publications

Recent Advances on Dual‐Band Electrochromic Materials and Devices

Recent Advances on Dual‐Band Electrochromic Materials and Devices

Titanium Dioxide in Chromogenic Devices: Synthesis, Toxicological Issues, and Fabrication Methods

Soluble Two-Dimensional Donor–Acceptor Aza-Fused Aromatic Frameworks and their Electrochromism between the Visible and Near-Infrared Regions

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