Daytime Radiative Cooling with Electrochemically Driven Dynamic Colors

作者：Shenghao Jin, Fahuai Yi, Zhen Gong, Dong Yang, Yujie Peng, Jiahao Hou, Jingjing Mao, Junkai Wang, Mengqi Liu, Run Hu, Kaihuan Zhang, Changying Zhao, Ming Xiao, Boxiang Wang · 发表于：ACS Energy Letters · 年份：2025 · DOI：10.1021/acsenergylett.5c02196 · 被引用次数：11 · 研究领域：Thermal Radiation and Cooling Technologies、Strong Light-Matter Interactions、Advanced Thermoelectric Materials and Devices

Colorful daytime radiative coolers are attractive for thermal management in aesthetically sensitive applications. However, existing colorful daytime radiative coolers offer only static colors and cannot realize color switching while maintaining persistent subambient cooling capability due to significantly increased solar absorption, restricting their potential applications in areas such as outdoor dynamic information displays. To address this challenge, we develop dynamic daytime radiative coolers that can simultaneously realize electrochemically driven color switching and subambient cooling. This dual functionality is achieved by reconfigurable, high-quality optical nanocavities via reversible metal electrodeposition, allowing for the first time in electrochromic, dynamic manipulation of the excitation/annihilation of narrowband resonant absorption. The devices achieve subambient cooling of 2.6–5.3 °C compared to inner air under direct sunlight and exhibit programmable dynamic color displays with high stability and flexibility. This work significantly expands the application scenarios of radiative cooling technology and provides a new paradigm for next-generation energy-saving and multifunctional smart devices for sustainability.