| Popis: |
On-demand and selective regulation of the radiative cooling (long-wave infrared, LWIR) and solar heat gain (ultraviolet-, visible- and near-IR, UV-vis-NIR) of building facades is a grand challenge but essential to decrease energy usage in buildings. Here, we report a reconfigurable interwoven surface that can dynamically switch the overlapping sequence to achieve spectral selectivity and ultrabroadband modulations for windows, walls/roofs with decent spectral modulations, and energy-saving performance. The result surpasses the best reported passive radiative cooling smart windows with a more than doubled visible transmittance (Tlum = 0.50) and LWIR modulation (ΔϵLWIR = 0.57). Our energy-saving samples outperform the commercial building materials across climate zones 2-6. This design principle is scalable and applicable for diverse materials, interwoven structures, and 2D-3D surfaces, which provide a strategy to give programmable heating/cooling modulations in various applications. Ministry of Education (MOE) National Research Foundation (NRF) The research was supported by the National Research Foundation, Prime Minister’s Office, Singapore, under its Campus for Research Excellence and Technological Enterprise (CREATE) program and the Singapore-HUJ Alliance for Research and Enterprise (SHARE), Minister of Education (MOE) Academic Research Fund Tier 1 RG103/19 (S), RG86/ 20, and RG71/21, and the Sino-Singapore International Joint Research Institute (SSIJRI). J.Y. would like to thank the National Science Foundation for grant numbers CMMI2005374 and CMMI-2013993. |
