Compensative Electrochromic Device Utilizing Electro-deposited Plasmonic Silver Nanoparticles and Manganese Oxide to Achieve Retention of Chromatic Color

Abstract

Silver deposition-based electrochromic (EC) device enabled various optical states by using either the electrodeposition of silver thin films or silver nanoparticles on an indium tin oxide electrode. These optical states, including chromatic colors such as cyan, magenta, yellow, and green, are based on absorption by the localized surface plasmon resonance of silver nanoparticles. However, an ideal counter-reaction material that does not affect the color representation by silver nanoparticles and does not dissolve the deposited silver has not been reported. To achieve both color retention and chromatic color representation, MnO 2 was utilized as the counter electrode material. The EC properties of the novel device with the MnO 2 counter electrode were investigated in terms of charge density and its ability to change color. The novel EC device achieved both representations of chromatic color and retained its color without power supply.

The effect of a polymer capping agent on electrodeposited silver nanoparticles in a silver deposition-based electrochromic device

“…In our previous study, instead Paper PCCP of Cu 2+ ions, the immobilization of charge compensation materials on the counter electrode was expected to improve color retention. 45,73 The monitored wavelength was the peak wavelength of the absorption band shown in Fig. 5 (600 nm for P-ECD and 590 nm for B-ECD).…”

“…It is noteworthy that this EC device can change color based on the simple electrochemical deposition and dissolution of Ag, thus achieving an EC device with sufficient stability over thousands of cycles. 33,45 Chromatic colors such as cyan, magenta, yellow, and green occur due to light absorption by localized surface plasmon resonance (LSPR) of the electrodeposited AgNPs. The wavelength of the LSPR band is known to shift depending on the size and shape of the metal nanoparticles.…”

“…It is noteworthy that this EC device can change color based on the simple electrochemical deposition and dissolution of Ag, thus achieving an EC device with sufficient stability over thousands of cycles. 33,45…”

Multi-Functional Electrospun AgNO3/PVB and Its Ag NP/PVB Nanofiber Membrane

“…PVB fibers also serve as composite matrix materials due to their stability and ease of removal, enabling the preparation of various composite materials, such as mesoporous alumina nanofibers and pure γ-Y 2 Si 2 O 7 , through electrospinning [ 8 , 9 , 10 ]. Additionally, PVB has been utilized as a substrate for liquid-assisted quasi-solid polymer electrolytes, organic light-emitting devices, and magnetic Fe 2 O 3 nanoparticles, showcasing its stability and performance [ 11 , 12 ].…”

Gel polymer electrolyte for reversible metal electrodeposition dynamic windows enables dual-working electrodes for faster switching and reflectivity control

“…Currently there are many technologies using electrochromic oxides and organic molecules to tune the color and transmission of the window (Barile et al, 2017). Compared with these technologies, dynamic windows based on reversible metal deposition (RME) have the advantage of potential low cost, neutral color, and great contrast ratio (Barile et al, 2017;Jeong et al, 2017;Hernandez et al, 2018;Strand et al, 2018;Hernandez et al, 2020;Eh et al, 2020;Kimura et al, 2020;Poh et al, 2021;Guo et al, 2022;Kimura et al, 2022;Song et al, 2022;Tao et al, 2022). These windows operate by the reversible electrodeposition of metals ions, e.g., Bi 3+ and Cu 2+ , to their metallic form on a Ptcoated indium tin oxide (ITO) transparent electrode.…”