Transparent-to-dark photo- and electrochromic gels
Transparent-to-dark photo- and electrochromic gels
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DOI：
10.1038/s42004-018-0075-2
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发表时间：
2018-11-02
影响因子：
5.9
通讯作者：
Draper, Emily R.
中科院分区：
文献类型：
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作者：
Gonzalez, Laura;Liu, Chung;Draper, Emily R.
可以根据需要控制透射率的智能窗户是减少建筑物能源使用的有前途的解决方案。窗户通常是建筑物中能源效率最低的部分，因此控制透射率有可能显着降低供暖成本。虽然存在许多方法，但许多合适的材料的制造和加工成本很高，因此新材料可能会产生重大影响。在这里，我们描述了一种基于凝胶的设备，这是光和电致变色。凝胶基质是由萘二酰亚胺的自组装形成的。萘二酰亚胺的自由基阴离子可以通过光或电化学形成，并导致从透明到黑色的理想转变。响应速度、产生自由基阴离子所需的低电位、系统的可循环性、温度稳定性和低成本意味着这些设备可能适合于智能窗户中的应用。
Smart windows in which the transmittance can be controlled on demand are a promising solution for the reduction of energy use in buildings. Windows are often the most energy inefficient part of a building, and so controlling the transmittance has the potential to significantly improve heating costs. Whilst numerous approaches exist, many suitable materials are costly to manufacture and process and so new materials could have a significant impact. Here we describe a gel-based device which is both photo- and electrochromic. The gel matrix is formed by the self-assembly of a naphthalene diimide. The radical anion of the naphthalene diimide can be formed photo or electrochemically, and leads to a desirable transition from transparent to black. The speed of response, low potential needed to generate the radical anion, cyclability of the system, temperature stability and low cost mean these devices may be suitable for applications in smart windows.