photosensitive electrochromic device

Abstract

The invention discloses a photosensitive electrochromic device, which includes a transparent non-conductive substrate, a thin film solar cell module and an electrochromic solution. The thin film solar cell module is a monolithic series-connected module, including a transparent substrate and multiple thin film solar cells located on the transparent substrate, and each thin film solar cell in the thin film solar cell module is connected in series with each other. The above-mentioned electrochromic solution is located between the transparent non-conductive substrate and the thin film solar cell module. When exposed to sunlight, the thin-film solar cell module directly provides current, causing the electrochromic solution to undergo an oxidation / reduction reaction and change color. In addition, since the photosensitive electrochromic device of the present invention can match the current thin film solar cell module process, it is beneficial to mass production. Moreover, through the series connection of the positive and negative electrode layers between thin-film solar cells, there is no need to add additional circuit wiring in the photosensitive electrochromic device, which can significantly reduce manufacturing costs and time.

Description

technical field [0001] The present invention relates to an electrochromic technology, and in particular to a photosensitive electrochromic device (Photosensitive Electrochromic Device). Background technique [0002] Although general electrochromic devices can be used as smart window glass with energy-saving effect and applied to green buildings, they still need an electric energy source and must consume energy. Typical structures of electrochromic devices are divided into solid-state and solution-type; the structure of solid-state electrochromic devices is as follows: figure 1 As shown, the upper and lower layers of the device 100 are composed of glass or plastic transparent substrates 102, and there are at least five layers of coatings / plating layers with different functions between the two transparent substrates 102, such as a transparent conductive layer 104, an electrochromic layer 106. The electrolyte layer 108 and the ion storage layer 110 are combined in a sandwich-l...

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Problems solved by technology

[0010] Although electrochromic technology has been researched for many years, only electrochromic rearview mirrors have been commercialized in large quantities so far, and other large-area electrochromic devices still cannot effectively overcome the phenomenon of uneven discoloration (iris effect)

The main reason is image 3 It shows that because the electric field path lengths of the electrodes 302 on both sides of the planar structure 300 of the above-mentioned patent are different at the edge and the center region 304, it is easy to cause obvious differences in the impedance of the edge region (electrode 302 position) and the center region 304, thus causing Electrochromic has significantly different color-changing concentrations in the edge region (where the electrode 302 is located) and the central region 304

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