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Vapor-Liquid Transition-Based Broadband Light Modulation for Self-Adaptive Thermal Management

文献类型： 外文期刊

作者： Zhang, Chenglin 1 ; Yang, Jinlong 1 ; Li, Yong 2 ; Song, Jianing 1 ; Guo, Junchang 1 ; Fang, Yuanlai 1 ; Yang, Xiao 3 ; Yang, Qichang 3 ; Wang, Dehui 1 ; Deng, Xu 1 ;

作者机构： 1.Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Chengdu 610054, Peoples R China

2.Sichuan Conservatory Mus, Digital Media Art Key Lab Sichuan Prov, Chengdu 610021, Peoples R China

3.Chinese Acad Agr Sci, Inst Urban Agr, Chengdu 610218, Peoples R China

4.Univ Elect Sci & Technol China, Shenzhen Inst Adv Study, Shenzhen 518110, Peoples R China

关键词： heat management; light management; phase transition; radiative cooling; self-adaptive thermal management; wettability

期刊名称：ADVANCED FUNCTIONAL MATERIALS （ 影响因子：19.924； 五年影响因子：19.978 ）

ISSN： 1616-301X

年卷期：

页码：

收录情况： SCI

摘要： Considerable research efforts have aimed to control indoor temperatures to improve daily life and industrial production. However, current strategies, which involve active regulation of energy input or passive regulation of sunlight transmission, cannot control indoor temperatures under all weather conditions. Herein, a self-adaptive thermal management device (STMD) that uses solar energy (heating) and radiative cooling (cooling) by exploiting the temperature differences across the device is reported. The adaptive heating and cooling functions are achieved by modulating sunlight transmittance and reflectance using a porous SiO2 coating separated/merged with a refractive index-matched liquid which serves as a shutter. As a result, the STMD in the opaque mode exhibits low transmittance and in the transparent mode exhibits sufficiently high solar transmittance. Taking advantage of this self-regulated shuttering mechanism, the developed STMD enables i) an increase of approximate to 10 degrees C relative to the ambient temperature under a solar intensity of 400 W m(-2) in cold weather and ii) a temperature reduction of approximate to 5 degrees C under a solar intensity exceeding 900 W m(-2) in hot weather. The described design strategy offers an approach for constructing smart light-controlling devices and thermal-controlling building materials.

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