A Dual‐Mode Electrochromic Platform Integrating Zinc Anode‐Based and Rocking‐Chair Electrochromic Devices

The complementary electrochromic device, where the optical transmittance changes upon the flow of cations back and forth between anodic and cathodic electrodes, operates in a rocking‐chair fashion if it can inherently self‐discharge. Herein, the first demonstration of a dual‐mode electrochromic plat...

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Bibliographic Details
Published in:Advanced functional materials 2023-06, Vol.33 (24), p.n/a
Main Authors: Zhang, Wu, Li, Haizeng, Elezzabi, Abdulhakem Y.
Format: Article
Language:English
Subjects:
Bleaching
Coupled modes
Devices
dynamic light controls
Electrochromic cells
Electrochromism
Electrodes
Materials science
Optical measuring instruments
Optoelectronic devices
Pigments
rocking‐chair type electrochromic devices
Smart materials
Switches
Switching
transparent electronics
Windows (apertures)
Zinc
zinc anode‐based electrochromic devices
Zinc plating
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Summary:The complementary electrochromic device, where the optical transmittance changes upon the flow of cations back and forth between anodic and cathodic electrodes, operates in a rocking‐chair fashion if it can inherently self‐discharge. Herein, the first demonstration of a dual‐mode electrochromic platform having self‐coloring and self‐bleaching characteristics is reported, which is realized by sandwiching zinc metal within a newly‐designed Prussian blue (PB)‐WO3 rocking‐chair type electrochromic device. It is demonstrated that the redox potential differences between the zinc metal and the WO3/PB electrodes endow the self‐color‐switching of these electrodes. By employing a hybrid electrolyte of Zn2+/K+, it is further shown that the colored PB‐WO3 rocking‐chair device is capable of spontaneously bleaching when the anodic and cathodic electrodes are coupled. This dual‐mode light‐control strategy enables the electrochromic devices to exhibit four distinct optical states with the highest optical contrast of 72.6% and fast switching times (
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.202300155