Dynamic multicolor electrochromic skin in high-brightness flexible WO3/ Au asymmetric Fabry-Perot nanocavity fabricated on Nylon 66 porous substrate

文献类型： 外文期刊

第一作者： Zhang, Shiyu

作者： Zhang, Shiyu;Rao, Aiguo;Niu, Chunhui;Wang, Lei;Yang, Mingqing;Bai, Xueqiong;Lv, Yong;Lin, Kai;Yao, Qi;Yao, Qi

作者机构：

关键词： Fabry-perot cavity; Multicolor electrochromic skin; WO3; Fabry-perot cavity; Multicolor electrochromic skin; Activecamouflage

期刊名称：CERAMICS INTERNATIONAL （ 影响因子：5.6； 五年影响因子：5.2 ）

ISSN： 0272-8842

年卷期： 2024 年 50 卷 21 期

页码：

收录情况： SCI

摘要： Recently, the Fabry-Perot (F-P) cavity electrochromic devices, which are constructed by combining nano-size inorganic electrochromic material WO3 and reflective metal layers, have attracted considerable attention due to their potentials in the fields of dynamic multicolor displays and active camouflage. However, in the few studies that have been reported, the peak reflectance of flexible F-P cavity multicolor electrochromic devices in the visible wavelength band is generally lower than 30 %, which limits their reflective display and camouflage effects in high-brightness environments. Thus, we have combined multicolor reflective electrochromic electrodes in WO3/Au asymmetric F-P nanocavity constructed by magnetron sputtering on a Nylon 66 porous substrate with a highly transparent UV-cured gel electrolyte and a PET plastic sealing procedure. As a result, a flexible and dynamic multicolor electrochromic skin with high reflectance (Rmax>50 %) and excellent flexibility (bending radius of 4 mm) has been fabricated. The WO3 electrochromic layer at the top works as the dynamic dielectric layer in the broadband absorption Fabry-Perot cavity, and the inert metal Au layer at the bottom works as the reflective layer. The WO3/Au asymmetric F-P cavity can acutely capture the variation in optical constants of WO3 due to the thickness change and electric-driven effects. This cavity facilitates the selective reflection and absorption of the energy distribution of the spectrum after the induced interferometric resonance. As a result, the cavity exhibits a rich array of structural colors, including ocher, taupe, yellow, orange, green, and violet. The electrochromic skin exhibits a fast switching time and maintains 99.43 % of the optical modulation amplitude (Delta R) after 110 coloring/bleaching cycles. It provides a potential option in the field of flexible high-brightness reflective displays and dynamic camouflage in the future.

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