Photonic-Structure Colored Radiative Coolers for Daytime Subambient Cooling,Nano Letters

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Photonic-Structure Colored Radiative Coolers for Daytime Subambient Cooling
Nano Letters ( IF 9.6 ) Pub Date : 2022-06-10 , DOI: 10.1021/acs.nanolett.2c01570
Shixiong Yu ₁ , Quan Zhang ₁ , Yufeng Wang ₁ , Yiwen Lv ₁ , Rujun Ma ₁

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Daytime subambient radiative cooling provides a powerful strategy for realizing sustainable thermal management without any external energy consumption. However, in practical situations a dazzling white or silver appearance is undesirable for aesthetic and functional reasons. Therefore, developing colored radiative cooling materials is greatly significant for more potential applications but remains a big challenge so far. Here, we reported a flexible colored radiative cooler based on interferometric retroreflection-induced structural color, which resolves the conflict between a colorful appearance for aesthetics and high solar reflection for cooling. All colored radiative coolers achieve subambient cooling of 4 K even under sunshine stronger than 1000 W/m², while the same color commercial paints are 9–27 K higher than the ambient. Such a flexible, scalable, and low cost colored radiative cooler is expected to replace commercial paint in a practical scenario with aesthetic and cooling requirements, enabling substantial reduction in carbon emission and energy consumption.

中文翻译：

用于白天低温冷却的光子结构彩色辐射冷却器

日间低温辐射冷却为实现可持续热管理提供了强大的策略，无需任何外部能源消耗。然而，在实际情况中，出于美观和功能的原因，令人眼花缭乱的白色或银色外观是不可取的。因此，开发有色辐射冷却材料对于更多潜在应用具有重要意义，但迄今为止仍然是一个巨大的挑战。在这里，我们报道了一种基于干涉回射诱导结构颜色的柔性彩色辐射冷却器，它解决了美观的彩色外观与冷却的高太阳反射之间的冲突。^{即使在强于 1000 W/m 2}的阳光下，所有有色辐射冷却器也能实现 4 K 的低温冷却，而相同颜色的商业涂料比环境高 9-27 K。这种灵活、可扩展和低成本的彩色辐射冷却器有望在具有美学和冷却要求的实际场景中取代商业涂料，从而大幅减少碳排放和能源消耗。

更新日期：2022-06-10

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