A feasible strategy for the fabrication of camouflage electrochromic fabric and unconventional devices

Yu, Hongtao; Qi, Maowei; Wang, Jianbo; Yin, Yuyang; He, Yaowu; Meng, Hong; Huang, Wei

doi:10.1016/j.elecom.2019.03.006

Cited by 42 publications

(25 citation statements)

References 23 publications

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“…Despite a lot of efforts on investigating the electrochromic performance and electrochemistry of ions‐based ECMs, the gaps between the practical performance of ECMs and people's expectations restricted their large‐scale application ( Figure a). [ 44–46 ] Actually, there are efficient ways to address the problems which involve the design of electrolytes and ECMs (Figure 3b). However, few reviews have discussed the design principles and roadmap of the electrolytes and ECMs to the practical use of ions‐based ECMs.…”

Section: Introductionmentioning

confidence: 99%

Electrochromic Materials Based on Ions Insertion and Extraction

Huang

Wang

Chen

et al. 2021

Advanced Optical Materials

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Reducing energy consumption is one of the major concerns in modern building design and construction because buildings account for ≈40% of the total energy consumption in modern society. Among various technologies for saving energy, electrochromic smart windows are considered as a highly promising one. Except for the application in saving energy, electrochromism has also attracted extensive attention in many other fields, such as, anti‐glare rearview mirrors, displays, military camouflage, flexible wearable fabric, etc. However, there are still many challenges needed to be solved, such as, the response rate and durability of electrochromic materials (ECMs). The transmission rate of ions in ECMs determines the response rate of the whole electrochromic device. Besides, the embedding depth and total amount of ions directly affect the contrast, durability, and coloration efficiency of ECMs. It is crucial to select suitable electrolyte ions to obtain high‐efficiency ECMs. Here, the challenges in ECMs based on ions insertion/extraction are presented, which are focused on advanced nanostructured ECMs’ design and electrochromic devices’ practical application. Recent advances in ECMs are presented to discuss the important questions, which are especially focused on the connection between suitable ions and advanced nanostructural ECMs. Finally, a perspective for next‐generation electrochromic devices is presented.

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Section: Introductionmentioning

confidence: 99%

Electrochromic Materials Based on Ions Insertion and Extraction

Huang

Wang

Chen

et al. 2021

Advanced Optical Materials

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“…Optical modulation using electrochromic materials plays an important role in many areas, from the design of smart glass [1] to the development of adaptive camouflage films [2], and the next-generation textile fashion [3]. Classical applications of electrochromic materials include embedding metal oxides in glass for the reduction of solar heat and glare, and incorporating polymers or metal oxides in flexible substrates for the development of information displays [4].…”

Section: Introductionmentioning

confidence: 99%

“…In this study, we focus on the latter. phenyl)-5,8-bis(2,3-dihydrothieno [3,4-b] [1,4]dioxin-5-yl)quinoxaline], 3,6-bis(dodecyloxy) thieno [3,2-b]-thiophene-dimethoxybenzene), occasionally doped with tungsten trioxide (WO 3 ), are deposited on ITO-coated textiles to render the fabrics electrochromism [2,5]. The textiles show a range of colours in response to a series of voltage stimuli and exhibit no degradation of colouration after 150 colouration-bleaching cycles when bent and twisted [2].…”

Section: Introductionmentioning

confidence: 99%

Development of 7-Segment Numeral Display Using Electrochromic Yarns for Advanced Functional Textiles

Yao¹

2020

JTSFT

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“…Compared with the traditional inorganic electrochromic materials, the advantages of conjugated polymers include higher coloration efficiency [8], shorter switching times, multiple colorations, fine-tunability of the band gap, feasibility of large-scale device production [9], and thin film flexibility [10]. Based on these advantages of practical value, electrochromic copolymers have achieved widespread applications encompassing smart windows [11], e-billboards [12], camouflage electrochromic fabrics [13], photodetectors [14], and so on.…”

Section: Introductionmentioning

confidence: 99%

“…Supplementary Materials: The following are available online at http://www.mdpi.com/2073-4360/11/12/2023/s1. Figure S1: 1 H NMR spectra (a) and 13 C NMR (b) of the compound B; Figure S2: 1 H NMR spectra (a) and 13 C NMR (b) of the monomer C; Figure S3: 1…”

mentioning

confidence: 99%

Synthesis and Characterization of Novel D-A Type Neutral Blue Electrochromic Polymers Containing Pyrrole[3-c]Pyrrole-1,4-Diketone as the Acceptor Units and the Aromatics Donor Units with Different Planar Structures

et al. 2019

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Three soluble conjugated polymers, named BEDPP, FLDPP, and CADPP, were prepared through the Suzuki polymerized reaction, and employed benzene (BE), fluorene (FL), and carbazole (CA) as the donor units, respectively. The electron-deficient molecule 2,5-bis-(2-octyldodecyl)-3,6-bis-(5-bromo-thiophene)-pyrrole[3-c]pyrrole-1,4-diketone(DPP) was introduced and used as the acceptor unit. The properties of these three copolymers were studied by a series of detailed characterization analysis, including X-ray photoelectron spectroscopy (XPS), colorimetry, electrochemical measurements, spectroelectrochemistry, kinetics, quantitative calculation, and thermogravimetric (TG) analysis, etc. The results revealed that BEDPP displayed a blue color in the neutral state and a light brown color in the oxidized state, FLDPP exhibited a cyan color in the neutral state and a gray color in the oxidized state, while CADPP displayed pure blue color in the neutral state and a light gray color in the oxidized state. All these polymers possess narrow optical band gaps lower than 1.80 eV and satisfactory thermal stability. The kinetic characterization showed that the optical contrasts (ΔT%) in the near-infrared region were superior to the visible region. The optical contrasts of BEDPP, FLDPP, and CADPP are 41.32%, 42.39%, and 45.95% in the near-infrared region, respectively, which made them a good application prospect in the near-infrared region. Amid the three polymers, CADPP has the highest coloration efficiency (around about 288 cm2·C−1) and fast switching times (0.77 s in the coloring process and 0.52 s in the bleaching process) in the visible region, and the comprehensive performance of CADPP can be comparable to that of the reported D-A (Donor-Acceptor) type blue color polymers. In general, based on the good performances and the stable neutral blue color, the three polymers had profound theoretical significance for the development of electrochromic material and the completion of the RGB (Red, Green, Blue) color space.

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A feasible strategy for the fabrication of camouflage electrochromic fabric and unconventional devices

Cited by 42 publications

References 23 publications

Electrochromic Materials Based on Ions Insertion and Extraction

Electrochromic Materials Based on Ions Insertion and Extraction

Development of 7-Segment Numeral Display Using Electrochromic Yarns for Advanced Functional Textiles

Synthesis and Characterization of Novel D-A Type Neutral Blue Electrochromic Polymers Containing Pyrrole[3-c]Pyrrole-1,4-Diketone as the Acceptor Units and the Aromatics Donor Units with Different Planar Structures

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