论文标题
白天的亚镜子辐射冷却，并通过耦合纳米腔介导的生动结构颜色
Daytime sub-ambient radiative cooling with vivid structural colors mediated by coupled nanocavities
论文作者
论文摘要
白天辐射冷却是一种有前途的无源冷却技术，用于打击全球变暖。现有的白天辐射冷却器通常由于其宽带高太阳反射率而显示出白色的颜色，这严重阻碍了在现实生活中的审美需求和有效显示的现实情况。但是，生动的颜色和高冷却性能之间存在权衡，因为颜色通常是通过可见光吸收而产生的，从而降低了净冷却能力。为了打破这种权衡，我们设计了具有耦合纳米腔的多层结构，并产生具有高冷却性能的结构颜色。使用此设计，我们可以获得比报道的颜色范围更大的颜色辐射冷却器（占17.7％的SRGB区域）。我们进一步制造彩色多层辐射冷却器（CMRC），并证明它们的温度下降平均为3.4-4.4度，基于室外实验。这些CMRC在电子/光电设备和户外设施的热管理中有希望。
Daytime radiative cooling is a promising passive cooling technology for combating global warming. Existing daytime radiative coolers usually show whitish colors due to their broadband high solar reflectivity, which severely impedes applications in real-life situations with aesthetic demands and effective display. However, there is a trade-off between vivid colors and high cooling performance because colors are often produced by absorption of visible light, decreasing net cooling power. To break this trade-off, we design multilayered structures with coupled nanocavities and produce structural colors with high cooling performance. Using this design, we can obtain colorful radiative coolers which show a larger color gamut (occupying 17.7% sRGB area) than reported ones. We further fabricate colorful multilayered radiative coolers (CMRCs) and demonstrate they have temperature drops of 3.4 - 4.4 degrees on average based on outdoor experiments. These CMRCs are promising in thermal management of electronic/optoelectronic devices and outdoor facilities.
