Flexible electro-chromic device

Abstract

The invention discloses a flexible electro-chromic device, and belongs to the technical field of functional materials and devices. The flexible electro-chromic device comprises six layers, namely a transparent flexible film, an electro-chromic film, a gold film with the thickness of 50 to 1,000 nanometers, a porous film substrate, a porous film material adsorbing electrolyte and a flexible lower electrode; wherein, the gold film is deposited on the porous film substrate by adopting a vacuum evaporation technology, and the electro-chromic film is deposited on the gold film by adopting an electrochemical method or a chemical in-situ polymerization method. The gold film is used as an upper electrode, and the gold film with the thickness of 50 to 1,000 nanometers has porous netlike structural characteristic, so that the electro-chromic film deposited on the gold film has better adhesive force; ions can smoothly pass through the porous film substrate and the gold film under the action of an electric field to realize implantation and extraction in the electro-chromic film material, so that reversible color change of the electro-chromic film is reflected; in addition, the gold film has good conductivity, so that the electro-chromic film deposited by adopting the electrochemical method is more uniform and the large-area electro-chromic device can be realized.

Description

technical field [0001] The invention belongs to the technical field of functional materials and devices, and relates to flexible electrochromic devices. Background technique [0002] Electrochromism (EC) refers to the phenomenon that under the action of an external electric field, the oxidation or reduction of materials leads to reversible changes in the transmission or reflection of light, and the appearance shows reversible changes in color and transparency. Electrochromic devices have shown good application prospects in real life, and have been widely used in electrochromic energy-saving smart windows, automotive rearview anti-glare mirrors, electrochromic displays, electrochromic memory, and sunglasses with color-changing functions and other products. Electrochromic materials have broad application fields. It is believed that with the development of science and technology in the new century and the continuous in-depth research and exploration of them, electrochromic mat...

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Problems solved by technology

However, in the subsequent work, it was found that the preparation of this type of film requires good solubility of the polymer in volatile organic solvents, and also requires that the type of polymer can form a flexible film by itself, which makes this method useful for polymer types. A little selectivity, which limits the application of this type of device

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