Complementary electrochromic devices based on acrylic substrates for smart window applications in aircrafts

Jeong, Chan Yang; Kubota, Takashi; Tajima, Kazuki; Kitamura, Masakazu; Imai, Hideaki

doi:10.1016/j.matchemphys.2021.125460

Cited by 20 publications

(4 citation statements)

References 36 publications

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“…Figure S8 shows the change in the transmittance with the increase in open-circuit time for the PB-WO 3 complementary electrochromic device for a period of 16 h. For the bleached state, the optical transmittance variation is obvious by 8.68% within 1 h and only 2.54% in the following 15 h. The most significant change in colored state is in the first 2 h at 7%, while the final change after 16 h is 11.24%. The response times for coloring and bleaching are extremely short with 5.7 and 4.7 s (Figure b), faster than those of the reported PB-WO 3 devices Figure c presents the plots of the time-dependent optical density variation as a function of charge density at 633 nm.…”

Section: Resultsmentioning

confidence: 76%

Homogeneous and Nanogranular Prussian Blue to Enable Long-Term-Stable Electrochromic Devices

Fu,

Li,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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The increasing demand for the state-of-the-art electrochromic devices has received great interest in synthesizing Prussian blue (PB) nanoparticles with a uniform diameter that exhibit excellent electrochromism, electrochemistry, and cyclability. Herein, we report the controllable synthesis of sub-100 nm PB nanoparticles via the coprecipitation method. The diameter of PB nanoparticles can be modulated by adjusting the reactant concentration, the selection of a chelator, and their purification. The self-assembled nanogranular thin films, homogeneously fabricated by using optimized PB nanoparticles with an average diameter of 50 nm as building blocks via the blade coating technique enable excellent performance with a large optical modulation of 80% and a high coloration efficiency of 417.79 cm 2 C −1 . It is also demonstrated by in situ and ex situ observations that the nanogranular PB thin films possess outstanding structural and electrochemical reversibility. Furthermore, such nanogranular PB thin films can enjoy the enhanced long-term cycling stability of the PB-WO 3 complementary electrochromic devices having a 91.4% optical contrast retention after 16,000 consecutive cycles. This work provides a newly and industrially compatible approach to producing a complementary electrochromic device with extraordinary durability for various practical applications.

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Section: Resultsmentioning

confidence: 76%

Homogeneous and Nanogranular Prussian Blue to Enable Long-Term-Stable Electrochromic Devices

Fu,

Li,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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“…Compared with NiO films obtained without template assistance, they exhibit considerably better EC cycling stability due to the highly porous morphology that shortens the ion diffusion path and provides a larger surface area. Jeong et al 93 used an additional UV treatment of PB and WO 3 films prepared by functional nanoparticle dispersion inks on ITO/acrylic substrates after wettability of ITO surface can be assembled into ECDs with the structure of acrylic/ITO/PB/K + ‐based gel electrolyte/WO 3 /ITO/acrylic acid. They can exhibit satisfactory cycle durability over 1800 cycles, and high light modulation and coloration efficiency of 76% and 112.99 cm 2 /C, respectively, can be observed at 633 nm.…”

Section: Optimisation Strategies For Stability Of Electrochromic Perf...mentioning

confidence: 99%

Electrochromic materials: Scope for the cyclic decay mechanisms and performance stability optimisation strategies

Wu,

Mishra,

Xiong

2023

Coloration Technology

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Electrochromic materials (ECMs) have important potential applications in the field of intelligent optoelectronic displays. However, ECMs and its devices cannot be truly applied on a large scale until the problem of their long‐period performance degradation is really solved. This article focuses on summarising the attenuation mechanism of common ECMs, which is mainly divided into three types: structural damage, irreversible reaction and ion capture, and summarises four optimisation strategies for the cyclic stability of ECMs at the present stage: doping is used to change the internal structure of the material in order to achieve the purpose of improving the cyclic stability; composite means to allow a variety of materials to interact with each other in order that the original material has no excellent performance; improve the cyclic stability of ECMs by the special characteristics of nanostructures; and enhance the performance by optimising the preparation process and regulating the parameters in the preparation process. Finally, the article discusses the potential for optimising the long‐term stability of ECMs in the future, based on the earlier‐mentioned research.

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“…Currently, EC materials are utilised in several applications, particularly for manufacturing EC smart windows. Based on the ability of electrochromic (EC) smart windows to convert between transparent and opaque states, they have garnered much interest in their possible use in sunroofs [3], displays [4], vehicle rear-view mirrors [5], and aircraft [6]. EC smart windows can also dramatically lower energy use by controlling the amount of solar heat and light entering buildings compared to traditional double-glazed windows [7,8].…”

Section: Introductionmentioning

confidence: 99%

Electrochromic Properties of Sol-Gel Deposited Electrochromic TiO2 Thin Films

Abdelrahman Hamed Ebrahem Abdelhamed,

Kah-Yoong Chan,

Benedict Wen-Cheun Au

et al. 2023

ARASET

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Electrochromic (EC) smart windows are a type of glass window that can change from transparent to darker colour shades when a small voltage is applied. Titanium dioxide (TiO2) can be utilised as an EC material for EC smart windows. Although the TiO2 sol-gel spin-coating method is commonly used, the effect of the number of TiO2 layers was not reported. Thus, this paper investigates the effect of the number of TiO2 layers. The increasing number of TiO2 film layers demonstrated a noticeable increase in the thin films ‘anodic and cathodic diffusion coefficient, particularly with 11 TiO2 layers. Additionally, the colouration and bleaching time was revealed to have a low correlation as the number of layers increased. Nonetheless, the lower number of TiO2 layers resulted in lower colouring transmittance. Comparatively, the colouration efficiency for all films did not exhibit any significant change. Hence this study on the effect of the TiO2 layering technique can open a new pathway in understanding the EC properties of TiO2-based EC devices.

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Complementary electrochromic devices based on acrylic substrates for smart window applications in aircrafts

Cited by 20 publications

References 36 publications

Homogeneous and Nanogranular Prussian Blue to Enable Long-Term-Stable Electrochromic Devices

Homogeneous and Nanogranular Prussian Blue to Enable Long-Term-Stable Electrochromic Devices

Electrochromic materials: Scope for the cyclic decay mechanisms and performance stability optimisation strategies

Electrochromic Properties of Sol-Gel Deposited Electrochromic TiO2 Thin Films

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