Nanowire-based smart windows combining electro- and thermochromics for dynamic regulation of solar radiation

Si-Zhe Sheng, Jin-Long Wang, Bin Zhao, Zhen He, Xue-Fei Feng, Qi-Guo Shang, Cheng Chen, Gang Pei, Jun Zhou, Jian-Wei Liu () and Shu-Hong Yu ()
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Si-Zhe Sheng: University of Science and Technology of China
Jin-Long Wang: Southern University of Science and Technology
Bin Zhao: University of Science and Technology of China
Zhen He: Southern University of Science and Technology
Xue-Fei Feng: University of Science and Technology of China
Qi-Guo Shang: University of Science and Technology of China
Cheng Chen: University of Science and Technology of China
Gang Pei: University of Science and Technology of China
Jun Zhou: University of Science and Technology of China
Jian-Wei Liu: University of Science and Technology of China
Shu-Hong Yu: University of Science and Technology of China

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract Smart window is an attractive option for efficient heat management to minimize energy consumption and improve indoor living comfort owing to their optical properties of adjusting sunlight. To effectively improve the sunlight modulation and heat management capability of smart windows, here, we propose a co-assembly strategy to fabricate the electrochromic and thermochromic smart windows with tunable components and ordered structures for the dynamic regulation of solar radiation. Firstly, to enhance both illumination and cooling efficiency in electrochromic windows, the aspect ratio and mixed type of Au nanorods are tuned to selectively absorb the near-infrared wavelength range of 760 to 1360 nm. Furthermore, when assembled with electrochromic W18O49 nanowires in the colored state, the Au nanorods exhibit a synergistic effect, resulting in a 90% reduction of near-infrared light and a corresponding 5 °C cooling effect under 1-sun irradiation. Secondly, to extend the fixed response temperature value to a wider range of 30–50 °C in thermochromic windows, the doping amount and mixed type of W-VO2 nanowires are carefully regulated. Last but not the least, the ordered assembly structure of the nanowires can greatly reduce the level of haze and enhance visibility in the windows.

Date: 2023
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DOI: 10.1038/s41467-023-38353-4

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