双稳态
材料科学
光电子学
光学双稳态
锌
吸收(声学)
能源消耗
电极
热的
还原(数学)
有色的
传输(电信)
响应时间
纳米技术
能量(信号处理)
发光二极管
太阳能
氧化还原
光开关
温度控制
热管
作者
Jiawei Wang,Zesheng Zhang,Guanran Wang,Xin Hu,Ce Dong,Norihisa Kobayashi,Chuannan Li,Jian Zhang,Y. Duan
标识
DOI:10.1002/adma.202521622
摘要
Electro-response switchable windows (ERSWs) can dynamically control light transmission on demand, which showed great application potential for construction of zero-energy buildings. However, ERSWs' poor bistability compromises their energy efficiency, and the solar heat absorption in dark colored state leads to undesirable parasitic heat re-emission, thereby diminishing their effectiveness in thermal management. In this work, a bistable reflectance-modulated electroreflective device based on reversible zinc electrodeposition (ZERD) is designed and prepared to achieve ultra-low-power heat management. A dynamic balancing strategy with highly matched potential for the Zn2⁺/Zn redox reaction on both side electrodes gave ZERD excellent bistability (28 days), fast switching (4 s for colored and 8 s for bleached). The reflectance-modulated property gave ZERD high Rsol (64.25%) and low SHGC (0.066), which meant it can reduce parasitic heat re-emission significantly. Outdoor tests demonstrated reflectance-modulated ZERD provided enhanced cooling performance compared to transmittance-modulated ERSW (a maximum temperature reduction of up to 8.4°C). Energy consumption calculations indicated ZERD required only needed to consume up to 0.8% of the total energy savings, while enabling substantial annual energy savings (up to 57.9% in worldwide). The ultralow-power bistable reflectance-modulated ZERD offered a valuable strategy for designing high-performance ERSW and supported progress toward zero-energy buildings.
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