Multispectral Synergistic Electrochromic Regulator With Triple Atmospheric Windows Selectivity for Global Building...

Area of Science:

• Materials Science
• Energy Science
• Optics

Background:

• Building energy consumption significantly contributes to global demand.
• Conventional building envelopes are limited by their passive thermal properties.
• Advanced thermal management is crucial for energy efficiency.

Purpose of the Study:

• To design and demonstrate a tunable multispectral regulator for year-round building energy saving.
• To achieve synergistic modulation of solar and infrared radiation.
• To develop a monolithic platform for intelligent thermal management.

Main Methods:

• Fabrication of an ITO/WO3/LiNbO3/NiO/ITO electrochromic all-thin-film stack.
• Utilizing an asymmetric Fabry-Pérot cavity for device architecture.
• Outdoor testing and EnergyPlus simulations for performance validation.

Main Results:

• The device achieved synergistic modulation with values of 0.52 (solar) and 0.64 (mid-far infrared).
• Demonstrated effective thermal regulation with a diurnal temperature difference of ~5.5°C in desert conditions.
• Simulations predicted substantial annual energy savings, especially for heating in cold climates (22.2 MJ/m2).

Conclusions:

• The developed multispectral regulator enables both summer cooling and winter heating through adaptive regulation.
• The tunable platform offers synchronized multispectra regulation for intelligent thermal management.
• This technology holds promise for next-generation energy-efficient buildings.