A kind of electrochromic device and preparation method thereof

Abstract

The invention relates to an electrochromic device, which includes a substrate and a first transparent conductive layer, an electrochromic layer, an electrolyte layer, an ion storage layer and a second transparent conductive layer deposited on the substrate in sequence. layer; the electrolyte layer is a PN junction film, which is composed of an N-type semiconductor doped region and a P-type semiconductor doped region. The invention also provides a preparation method of the above-mentioned electrochromic device. The electrochromic device of the present invention utilizes the principle that the PN junction conducts electricity in the forward direction and the reverse resistance is large. Under the forward working voltage, the barrier layer in the PN junction becomes narrower, and the diffusion becomes easier, and the electrochromic The coloring of the electrochromic layer occurs rapidly, reducing the coloring time; when no voltage is applied or a small reverse voltage is applied, the leakage current is greatly reduced due to the large resistance, thereby significantly prolonging the coloring time of the electrochromic layer. The device has fast coloring and obvious open-circuit memory effect, which greatly prolongs the cycle life of the electrochromic glass.

Description

technical field [0001] The invention relates to an electrochromic device, in particular to an electrochromic device with obvious memory effect and a preparation method thereof. Background technique [0002] The phenomenon of electrochromism refers to the phenomenon that the material is accompanied by H under the action of an external electric field. + , Li + 、Na + The electrochemical reaction process occurs when the plasma is injected or extracted, and its optical properties are reversibly changed, thereby realizing the regulation of light reflection, transmission, and absorption. Devices made of electrochromic materials are called electrochromic devices. Electrochromic devices have the advantages of high efficiency, low consumption, no pollution, and intelligence. All have broad application prospects. Electrochromic glass is a commonly used electrochromic device, in which the electrolyte layer of electrochromic glass is the transmission channel for ions required for ele...

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Problems solved by technology

At present, no electrochromic glass with excellent performance and stable discoloration has been put into the market in large quantities. Second, it is easy to produce pinholes or impurities during the preparation process. These defects cause very serious leakage current, which leads to a sharp increase in power consumption when maintaining the colored state, and seriously damages the life of the device in the long run.

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