A highly visible-transparent thermochromic smart window with broadband infrared modulation for all-season energy savings.

IF 16.3 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

National Science Review Pub Date : 2024-11-13 eCollection Date: 2025-02-01 DOI:10.1093/nsr/nwae408

Yi Jiang, Yunlong Wang, Deshuo Kong, Zipeng Chen, Zhengwei Yang, Ningning Cao, Haowen Chi, Shining Zhu, Qiuhong Zhang, Jia Zhu, Bin Zhu

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引用次数: 0

Abstract

Thermochromic smart windows effectively reduce the energy consumption for buildings through passive light modulation including the transmission of visible (T_Vis) and near-infrared (T_NIR) light, and the emissivity of mid-infrared (ε_MIR) light in response to ambient temperature change. However, thermochromic windows that maintain high T_Vis while modulating T_NIR and ε_MIR simultaneously are highly desirable but still challenging. Here, we develop a thermochromic smart window based on a two-way shape memory polymer to enable reversible transformation and achieve T_NIR modulation of 44.0% and ε_MIR modulation of 76.5% while maintaining high T_Vis (>50%). Compared to traditional windows based on silica glass, this device shows 4°C lower temperature in summer daytime, 2°C higher in winter daytime, and 1°C higher in spring nighttime. It is expected that our device can achieve greater annual energy savings in comparison with commercial glass anywhere in the world and promote the progress of thermochromic windows for energy-efficient buildings.

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一个高可见透明的热致变色智能窗口，具有宽带红外调制，可全年节能。

热致变色智能窗通过被动光调制，包括可见光（TVis）和近红外（TNIR）光的透射以及中红外（εMIR）光的发射率随环境温度变化而变化，有效地降低了建筑物的能耗。然而，在同时调制TNIR和εMIR的同时保持高TVis的热致变色窗是非常理想的，但仍然具有挑战性。在这里，我们开发了一种基于双向形状记忆聚合物的热致变色智能窗口，实现了可逆转换，并实现了44.0%的TNIR调制和76.5%的εMIR调制，同时保持了高TVis（>50%）。与传统硅玻璃窗相比，该装置夏季白天温度降低4℃，冬季白天温度升高2℃，春季夜间温度升高1℃。与世界上任何地方的商用玻璃相比，我们的设备有望实现更大的年度节能，并推动节能建筑的热致变色窗的发展。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

National Science Review MULTIDISCIPLINARY SCIENCES-

CiteScore

24.10

自引率

1.90%

发文量

249

审稿时长

13 weeks

期刊介绍： National Science Review (NSR; ISSN abbreviation: Natl. Sci. Rev.) is an English-language peer-reviewed multidisciplinary open-access scientific journal published by Oxford University Press under the auspices of the Chinese Academy of Sciences.According to Journal Citation Reports, its 2021 impact factor was 23.178. National Science Review publishes both review articles and perspectives as well as original research in the form of brief communications and research articles.