SIZO/Ag/SIZO/NiO sandwich film based smart window combining hybrid low emissivity and electrochromism for the dynamic control of solar radiation

초록

Low-emissivity (Low-e) smart windows are a promising option for effective thermal regulation, aimed at reducing energy consumption and enhancing interior comfort via their ability to modulate sunlight. To improve the sunlight modulation (VIS) and thermal management (NIR) of smart windows, we present an assembly of amorphous SIZO/Ag/SIZO/NiO electrode to develop Low-e electrochromic windows for the dynamic control of solar radiation, fabricated via sputtering technology at room temperature. The fabricated device demonstrates an exceptionally high visible modulation (78 %), providing clear visibility in windows, and superior near-infrared (NIR) shielding efficacy (>80 % in whole scale), good cyclic stability, with an ultrafast switching speed of 1 s for bleaching and 3 s for coloration. The capacitive electrochromic electrode, with a specific capacitance of 220 Fg-1, exhibits enhanced electrochemical kinetics, substantial charge capacity, and is suitable for application as a secondary energy storage device. The beneficial, extremely disordered amorphous structure, coupled with an enormous quantity of defects, promotes ultra-fast ion intercalation and de-intercalation processes with enhanced electrochromic efficiency. This research signifies a notable progression in the fabrication of Low-e electrochromic films, which will illuminate advancements in electrochromic technology for future energy-efficient smart buildings.

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