Innovative dual-band energy-efficient smart windows using VO2(M)-Based Fabry-Pérot structures for solar and radiative cooling modulation

IF 10 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Joonho Keum , Jun Choi , Sujin Kim , Guyoung Kang , Byuonghong Lee , Min Jae Lee , Woochul Kim
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Abstract

Thermochromic windows have been studied as a promising solution for energy-efficiency with the dynamical adjustment of solar heating in response to temperature. Recent advancements in the field have introduced simultaneous multiband modulation, incorporating radiative cooling in the longwave infrared range. In this work, we present VO2(M)/TiO2(A)/ITO multilayer-coated glass (referred to as VTI) as a scalable and effective smart window that modulates both solar transmission and radiative cooling concurrently. As a semitransparent window in the solar spectrum, the VTI coating achieves nearly 100 % visual clarity, 38.5 % visible transparency, and 8.5 % modulation of solar transmittance. In the longwave infrared region, the VTI multilayer demonstrates an exceptional broadband emissivity shift of up to 42.5 %, made possible by an innovative Fabry-Pérot (F-P) cavity composed of absorbing metal oxides. This high degree of emissivity modulation is maintained across a wide range of spacer thicknesses, from 100 to 500 nm, as confirmed by both experimental data and simulations. The modulation mechanism of the F-P cavity which use ultrathin spacer (λ/140 ∼ λ/16) at its resonant absorption range is explained through incremental phasor analysis by the transfer-matrix method. Additionally, the scalability and practicality of the VTI film are supported by its three-layer composition and the room-temperature reactive magnetron sputtering deposition process. These results suggest that the design principles presented here could inspire further innovations in broadband longwave infrared emissivity modulation, utilizing ultrathin F-P cavities composed of semitransparent metal oxides.
热致变色窗作为一种很有前途的节能解决方案,可以根据温度动态调节太阳能加热。该领域的最新进展是引入同步多波段调制,在长波红外范围内结合辐射冷却。在这项工作中,我们提出了VO2(M)/TiO2(A)/ITO多层镀膜玻璃(简称VTI)作为可扩展和有效的智能窗口,同时调节太阳能传输和辐射冷却。作为太阳光谱中的半透明窗口,VTI涂层的可见光清晰度接近100%,可见光透明度为38.5%,太阳透过率调制率为8.5%。在长波红外区域,VTI多层材料显示出高达42.5%的宽带发射率偏移,这是由吸收金属氧化物组成的创新的法布里-帕姆罗特(F-P)腔所实现的。实验数据和模拟都证实,这种高度的发射率调制在间隔层厚度的很宽范围内(从100到500纳米)保持不变。通过转移矩阵法的增量相量分析,解释了超薄间隔层(λ/140 ~ λ/16)在F-P谐振吸收范围内的调制机理。此外,VTI薄膜的三层组成和室温反应磁控溅射沉积工艺支持了其可扩展性和实用性。这些结果表明,本文提出的设计原则可以激发宽带长波红外发射率调制的进一步创新,利用半透明金属氧化物组成的超薄F-P腔。
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
Materials Today Physics
Materials Today Physics Materials Science-General Materials Science
CiteScore
14.00
自引率
7.80%
发文量
284
审稿时长
15 days
期刊介绍: Materials Today Physics is a multi-disciplinary journal focused on the physics of materials, encompassing both the physical properties and materials synthesis. Operating at the interface of physics and materials science, this journal covers one of the largest and most dynamic fields within physical science. The forefront research in materials physics is driving advancements in new materials, uncovering new physics, and fostering novel applications at an unprecedented pace.
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