2021
DOI: 10.1002/adma.202106073
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Viologen‐Immobilized 2D Polymer Film Enabling Highly Efficient Electrochromic Device for Solar‐Powered Smart Window

Abstract: In particular, with the increasing demand for efficient energy usage, energy-saving buildings using EC smart windows have garnered the most attention. This is because the EC smart windows are capable of regulating the transmission of visible and near-infrared light under potential bias, allowing building energy use savings up to 40%. [1a,2] To meet this application need, developing highly efficient ECDs is in great demand. So far, a broad variety of EC materials have been explored in recent years, including m… Show more

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Cited by 55 publications
(38 citation statements)
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“…The implementation of viologen-based electrochromic and thermochromic smart windows has been extensively studied due to the excellent chromomeric reversible properties of viologen over the last few decades. However, photochromic windows constructed from viologen and its derivatives have received less attention because the process requires a high-energy light source or is limited by the harshness of the crystallization and self-assembly conditions used for viologen-based photochromic systems. It is given that the efficient pathway of ET of BcpV 2+ could be elegantly achieved in the confined cavity of Q[8] via host–guest interactions.…”
Section: Resultsmentioning
confidence: 99%
“…The implementation of viologen-based electrochromic and thermochromic smart windows has been extensively studied due to the excellent chromomeric reversible properties of viologen over the last few decades. However, photochromic windows constructed from viologen and its derivatives have received less attention because the process requires a high-energy light source or is limited by the harshness of the crystallization and self-assembly conditions used for viologen-based photochromic systems. It is given that the efficient pathway of ET of BcpV 2+ could be elegantly achieved in the confined cavity of Q[8] via host–guest interactions.…”
Section: Resultsmentioning
confidence: 99%
“…4B, the color of the pixelated display reversibly changes with sinusoidal voltages from 0.5 Hz to 10 Hz. This suggests that the color switching time is much smaller than 0.1 s, which is faster than electrochromic materials based on chemical reactions (more than 1 s) 37,38 or structurally colored displays where particles are moving in solution under voltages (1–2 s). 14 In addition, the latter two systems need even longer times (up to several minutes) to switch back to their original colors.…”
Section: Resultsmentioning
confidence: 99%
“…Designing EC materials as frameworks with intrinsic porous nanostructures, such as metal–organic frameworks (MOFs), , covalent organic frameworks (COFs), and hydrogen-bonded organic frameworks (HOFs), is also a promising development trend. The frameworks mentioned here are organic or organic–inorganic hybrid crystalline/quasi-crystalline porous materials with a periodic network structure.…”
Section: Electrochromic Materials and Devicesmentioning
confidence: 99%