6results about How to "Excellent electrochromic performance" patented technology

The application discloses a kind of double ion modified Bi2WO6 electrochromic thin film materials and preparation method thereof, and relates to the field of electrochromic thin film.The preparation method of the application includes the following steps: (1) hydrothermal controllable preparation Bi2WO6 Nanometer powder;(2) using hydrogen ion and alkali metal ion to Bi2WO6 Nanometer powder is carried out double ion replacement reaction to modify Bi2WO6 Crystal lattice structure;(3) the Bi2WO6 Nanometer powder after double ion modification is made into the nanometer dispersion liquid with good dispersibility, then double ion modified Bi2WO6 electrochromic thin film material is obtained by spin coating process.The method retains the key structural characteristics of precursor phase by soft chemical modification, and the double ion modified Bi2WO6 electrochromic thin film shows excellent electrochromic performance in near-infrared band, and the optical modulation amplitude is greatly increased.The preparation method is simple, safe and controllable, low in cost, and has wide application prospect.

This invention relates to conjugated polymers containing dibenzofuran (thiophene) and carbazole units, their preparation methods, and applications. To address the problems of poor optical contrast, slow response time, and poor cycling stability of existing conjugated polymers as electrochromic materials, this invention uses 2,8-dibromodibenzofuran or 2,8-dibromodibenzothiophene as reactants, reacting them with 9-hexyl-3,6-bis(4,4,5,5-tetramethyl-1,3,2-dioxoborane-2-yl)-carbazole or 9-phenyl-3,6-bis(4,4,5,5-tetramethyl-1,3,2-dioxoborane-2-yl)-carbazole to form conjugated polymers with dibenzofuran (thiophene) and carbazole units in the main chain. The conjugated polymers of this invention exhibit excellent electrochromic properties, including excellent cycling stability, fast switching time, high optical contrast, and low voltage start-up. This invention is expected to be applied in fields such as smart windows, rearview mirrors, military camouflage, and electronic tags in the construction and automotive industries.

The application provides a thermosetting viologen electrochromic solution and an electrochromic device. The thermosetting viologen electrochromic solution comprises the following components at the following concentrations: 1.5-4.5 g / mL of a diepoxy functional group molecule, 0.5-0.8 g / mL of an anhydride curing agent, 0.1-0.4 g / mL of a viologen compound, and 0.05-0.3 g / mL of a counter electrode material; the diepoxy functional group molecule is at least one selected from bisphenol f diglycidyl ether, bisphenol a diglycidyl ether and bisphenol s diglycidyl ether. The electrochromic device comprises a solid electrochromic layer formed by curing the thermosetting electrochromic solution. The application optimizes the formula, so that the electrochromic solution can achieve thermal curing while ensuring good electrochromic performance, solves the problems of easy leakage and poor safety of the viologen electrochromic device, and can be thermally cured and formed, avoiding the potential adverse effects of the ultraviolet curing method on the performance of the device.

The application discloses a kind of conjugated polymer based on alkyl-substituted phenyl and its preparation method and application, belong to polymer material technical field.The conjugated polymer provided in the application has structural formula as shown in formula (I):In formula (I), X1-X4 each independently is H or R, and at least one of X1-X4 is R.The alkyl-substituted phenyl is used as intermediate unit in the application, 3,4-ethylenedioxythiophene is used as electron-donating unit, by introducing benzene ring, so that rigid coplanar existence fusion ring structure in molecule, enhance charge flow, again combined with the alkyl of specific substitution quantity and substitution position, can adjust the electronic distribution and conjugated chain length of conjugated polymer, obtain the conjugated polymer with good electrochromic performance such as low bandwidth, wide absorption range, fast response time, good optical transmittance, good stability, the conjugated polymer has wide application in the preparation of electrochromic material or electrochromic device.

The present application adopts inkjet printing and non-catalyst chemical nickel plating method to deposit metal nickel on transparent nylon net and silk net, realizes the preparation of low-cost large-scale flexible transparent conductive substrate with controllable morphology, and is suitable for large-scale mass production. The present application is very beneficial to the integration of planar microelectronic devices. Based on the technology, a flexible transparent Zn net electrode is prepared by electroplating Zn on the Ni-P pattern nylon net. The ZECD window with zinc net anode and prussian blue (PB) cathode shows significant electrochromic performance, including fast switching time, high optical contrast and excellent cycle performance. These ZECDs are also very suitable for solar charging intelligent windows, which can further solve the problem of solar intermittency. These findings open up new opportunities for energy storage and conversion transparent devices.

This invention discloses a method for preparing an electrochromic ion storage layer thin film, comprising the following steps: S1: reacting terephthalaldehyde or a terephthalaldehyde derivative with 2-acetylpyridine or a 2-acetylpyridine derivative to generate 1,4-bis[1,5-dioxo-1,5-bis(2-pyridyl)pentan-3-yl]benzene or a derivative thereof; then reacting it with ammonium acetate to obtain an organic ligand; reacting it with RuCl2(DMSO)4 to obtain a metal supramolecular polymer; S2: mixing it uniformly with a solvent and dimethylformamide to obtain an electrochemical deposition precursor solution; S3: depositing it at a constant potential via electrochemical deposition to obtain the electrochromic ion storage layer thin film. The thin film prepared by this invention not only has advantages such as fast response speed, high coloring efficiency, and wide optical modulation range, but also has good cycling stability.