Fig. 2: Selective light absorption of smart windows.

a Normalized absorbance spectra of Au NRs with multiple sizes. b Photographs of the selective light absorption-electrochromic film. c The transmittance spectra of electrochromic film and SLE films under solar spectral irradiance (AM 1.5G). d The transmitted irradiance of SLE films in the VIS, NIR−1, and solar regions. e The indoor cooling performance measure apparatus for films under the 100 mW cm−2 illumination to simulate sunlight. An IR camera was used to real-time record the temperature of the blackbody in the center of model chamber to demonstrate the cooling performance of smart windows. f, g The infrared images and temperature change for blackbody in the model chamber installed with different films under the 100 mW cm−2 simulated illumination for 1 h. Source data are provided as a Source Data file.