Solution-Processable and Patternable Poly(o-methoxyaniline)-Based Nanocomposite Film for Large-Area Electrochromic Display with Large Optical Modulation and Ultrafast Response Speed

Abstract

The solution-processable silica/poly(o-methoxyaniline) (SiO 2 /PMOANI) nanocomposites were prepared by chemical oxidative polymerization for the first time. The SiO 2 /PMOANI film electrode was fabricated by spraying nanocomposites dispersion onto ITO conductive glass. A large optical contrast (77.1% at 700 nm), fast switching speed (910 ms for bleaching, 940 ms for coloring), high coloration efficiency, and good durability are achieved by SiO 2 /PMOANI nanocomposite film. And the SiO 2 /PMOANI film was successfully assembled into an all-solidstate electrochromic device. The electrochromic device based on SiO 2 / PMOANI film exhibits large optical modulation, ultrafast switching speed (446 ms for bleaching, 453 ms for coloring), and excellent cycling stability (optical contrast decay of only 4.3% after 1000 cycles). Moreover, the large-area electrochromic display based on SiO 2 / PMOANI film with high-quality pattern was fabricated by spray-coating method using a mask to form patterns. The patterned electrochromic display presents a fast switching speed and large optical modulation. The solution-processable SiO 2 /PMOANI nanocomposites show potential applications for large-area smart windows, energy-efficient displays, and multifunctional electronic devices.

Nickel Cobalt Oxide Nanoneedles for Electrochromic Glucose Sensors

“…Easy and accurate cyclic voltammetry (CV) measurements help to understand the oxidation process for detecting glucose with high sensitivity at a low detection limit (LOD) and help also to optimize the operation voltage for power-efficient function . The above-mentioned oxides and their nanostructures also show electrochromic properties − by exhibiting bias-dependent color modulation. − Such electrochromic devices also have the capability of helping to achieve an energy device like a supercapacitor, thus showing multifunctional properties. , Interestingly, the underlying mechanism of an electrochromic device’s operation is based on the active materials’ redox activity . Thus, developing the above-mentioned metal oxides in the appropriate nanoarchitecture may help to get a device/electrode for dual application in electrochromism and glucose sensing …”

Achieving a highly safe supercapacitor via the combination of a temperature-responsive hydrogel-electrolyte and electrochromic electrodes

“…4a shows pairs of typical redox peaks at voltages of À0.1 V and +0.75 V, indicating that POMA and PEDOT : PSS are faradaic pseudo-capacitor materials and realize charge storage through reversible redox reactions. 29 The capacitive behaviors of the PNAB-SSC were further tested by galvanostatic charge/discharge (GCD) experiments at different current densities. As shown in Fig.…”

“…POMA was synthesized via chemical oxidative polymerization according to our previous work. 29 Briefly, 0.62 g o -methoxy aniline monomer was added into the reaction flask, and then 12.28 g of NaCl powder and 70 mL of 1 M HCl were added into the flask, acting as the additive and dopant respectively. After being subjected to an ultrasonic treatment for 10 minutes, the mixture was magnetically stirred for 30 minutes to obtain a uniform dispersion.…”

Prussian blue‐based inorganic flexible electrochromism glucose sensor

“…Flexible electrochromic devices are of utmost importance among flexible electronics due to their multifunctional applications in solar cell, resistive memory devices, energy storage device and glucose sensing while simultaneously functioning as an electrochromic device [4][5][6][7][8][9]. Electrochromic devices are known for reversibly changing their optical properties (reflectance/transmission/absorbance) under external applied bias and the materials exhibiting such properties are termed as electrochromic materials [10][11][12][13]. In addition to the multifunctional property, flexible electrochromic devices have an additional feature of deformation making them potentially useful in curved windows, military camouflage, etc [14][15][16].…”