Dual‐band electrochromic materials for energy‐saving smart windows

Abstract

Smart windows refer to those which can dynamically modulate the transmitted light by changing their colors. Dual-band electrochromic materials (ECMs) refer to materials that can change their colors and regulate light transmission in both visible (VIS) and infrared (IR) regions under different voltages. The dual-band ECMs-based building windows can thus regulate the indoor temperature to reduce the energy consumption for heating and airconditioning systems. Therefore, the wide application of ECMs in building windows will contribute a lot to establishing an energy-saving society. During the past decades, enormous efforts have been made to improve the performance of dual-band ECMs. This review presents a summary of the recent progress of dual-band ECMs, focusing on their modulation mechanism, material design, and performance optimization. Finally, the challenges and outlook of dual-band ECMs are also discussed.

Amorphous and Crystalline Ti-Doped WO3·2H2O for Dual-Band Electrochromic Smart Windows

“…6,7 However, the NIR region carries about 43% of solar heat and contributes nothing to illumination; the general ESW can only modulate transmittance in wide wavelengths; therefore the energy saving is not obvious. 8 DESW can selectively modulate the VIS and NIR light, which can effectively reduce building energy consumption. 9−11 Dual-band electrochromic materials are the key to achieve DESW.…”

“…Building energy consumption accounts for more than 40% of global energy consumption, half of which is used for lighting, heating, and cooling. , VIS and NIR light carry most light and heat of solar energy, and can enter the buildings through windows, affecting indoor light and temperature. − The electrochromic smart windows (ESW) can dynamically modulate the optical transmittance to achieve energy saving. , However, the NIR region carries about 43% of solar heat and contributes nothing to illumination; the general ESW can only modulate transmittance in wide wavelengths; therefore the energy saving is not obvious . DESW can selectively modulate the VIS and NIR light, which can effectively reduce building energy consumption. − …”

Microwave‐Assisted Quick Synthesis of Ru(II)‐Based Metallosupramolecular Polymer for Improved Electrochromic Properties

“…The demand for carbo-neutralization in smart window applications has led to an increased research attention for electrochromic (EC) materials. [1][2][3][4] For EC applications, the material DOI: 10.1002/macp.202300381 must possess a variety of qualities, including excellent redox stability, high contrast ratio and coloration efficiency (CE, 𝜂), controllable switching, and good processability. Various EC materials such as Prussian blue, [5] viologens, [6] conducting polymers, [7,8] metal phthalocyanines, [9] and Tungsten trioxide (WO 3 ) [10,11] have been previously investigated.…”

WO3 Nanorod Array-Modified Prussian Blue with Long Cycling Stability for High-Performance Dual-Band Electrochromic Materials

“…It usually consumes a lot of energy for maintaining the heating and lighting system to obtain a comfortable indoor temperature and brightness. Electrochromic (EC) smart windows refer to windows that can dynamically modulate the transmitted light under a slight electric field and thus modulate indoor temperature . Specifically, solar irradiance is distributed in ultraviolet, visible, and infrared regions, which account for 5, 52, and 43%, respectively. , Therefore, it is important to develop EC smart windows that can simultaneously modulate the light in the visible and infrared regions, which are also called dual-band EC smart windows.…”