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An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
Published on: February 27, 2019
Visible-Infrared Dual-Band Modulation Inorganic Electrochromic Colorful Smart Window
Jiaming Yang1, Mengying Wang1, Zheng Meng2
1School of Energy and Power Engineering, Beihang University, Beijing 100191, P. R. China.
Abstract:
Electrochromic (EC) technology can modulate visible-infrared (VIS-IR) optical properties under electrical stimulation, showing broad application prospects in smart windows and so on. This work demonstrates a colorful electrochromic smart window by employing vanadium oxide V2O5 with polaronic effects and ITO films with localized surface plasmon resonance (LSPR) to realize outstanding VIS-IR dual-band optical modulation and EC performance. It shows yellow and green reversible color switching, fast response (3.0 s for VIS bleaching and 0.32 s for IR emissivity rising), high optical modulation amplitude with ΔTmax = 53.2% at 850 nm and Δεmax = 0.57 at 4.8 μm, and a long lifetime of 104 reversible cycles. The new design methods of the excellent stability VIS-IR modulation in this smart window emphasizes the role of multiband modulation for the diversification of all the EC applications.
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