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Electrochromic film as well as preparation method and application thereof

An electrochromic and thin-film technology, applied in nanotechnology, titanium oxide/hydroxide, optics, etc. for materials and surface science, can solve problems such as single color change, poor cycle stability, and low coloring efficiency, and achieve The effect of high optical contrast, good stability and fast response time

Inactive Publication Date: 2020-04-17
JILIN INST OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many deficiencies in polyacid-based electrochromic materials, such as single color change, poor cycle stability, low light contrast, low coloring efficiency, etc.

Method used

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  • Electrochromic film as well as preparation method and application thereof
  • Electrochromic film as well as preparation method and application thereof
  • Electrochromic film as well as preparation method and application thereof

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preparation example Construction

[0032] The invention provides a method for preparing an electrochromic thin film, comprising:

[0033] Soak the silane-modified titanium dioxide nanowire conductive substrate in the polyoxometalate solution and the PEI solution in sequence, and repeat the above immersion for 1 to 50 times to obtain the electrochromic film;

[0034] The polyoxometalate is K 17 [Ce(P 2 W 17 o 61 ) 2 ]·nH 2 O.

[0035] According to the present invention, the present invention repeatedly soaks the silane-modified titanium dioxide nanowire conductive substrate in the polyoxometalate solution and the PEI solution to obtain an electrochromic film; wherein, the polyoxometalate solution is preferably composed of The polyoxometalate is prepared by dissolving in a buffer solution; the buffer solution is an acetic acid-sodium acetate buffer solution; the concentration of the polyoxometalate in the polyoxometalate solution is preferably (2~10)×10 -3 mol / L, more preferably (3~8)×10 - 3 mol / L, most ...

Embodiment 1

[0045] Rare earth substituted polyoxometalates / TiO 2 Preparation of composite membrane

[0046] (1) TiO 2 Preparation of nanowires

[0047] Cut FTO into small pieces of 33mm×20mm, wash and set aside. Mix and stir 18ml of water, 18.5ml of hydrochloric acid, and 0.45ml of butyl titanate for 30 minutes to make a precursor solution; put the FTO conductive side down into the hydrothermal synthesis kettle, pour 6ml of the precursor solution into the reaction kettle, and tighten And heat in a constant temperature oven at 150°C for 4 hours, turn off the oven and take out the titanium dioxide nanowires, rinse with distilled water and then with absolute ethanol, and blow dry with a hair dryer. The fired NW is fired at 450° C. for 30 minutes and annealed to obtain a silane-modified titanium dioxide nanowire conductive substrate; the transmittance of the NW is measured, and 70% to 80% is qualified.

[0048] (2) Preparation of composite membrane

[0049] Prepared TiO 2 The nanowires ...

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Abstract

The invention provides an electrochromic film and a preparation method and application thereof.The electrochromic film is obtained by sequentially soaking a silane-modified titanium dioxide nanowire conductive base material in a polyoxometallate solution and a PEI solution and repeating the soaking for 1-50 times; the polyoxometallate is enabled to be K17 [Ce (P2W17O61) 2]. NH2O, so that the obtained electrochromic film shows excellent electrochromic performance, and the light contrast reaches 48.0%; the coloring time and the fading time are 2.3 s and 1.5 s respectively, the coloring efficiency reaches up to 408.0 cm < 2 >. C <-1 >, and the stability of the material is good. The electrochromic film provided by the invention is high in optical contrast, short in response time and good in stability, and can be used for preparing an electrochromic device.

Description

technical field [0001] The invention relates to the field of organic synthesis, in particular to an electrochromic thin film and its preparation method and application. Background technique [0002] Electrochromism refers to the phenomenon that the valence state and chemical composition of materials undergo reversible changes under the action of an electric field, resulting in changes in their optical properties, resulting in discoloration. The applications of electrochromic devices mainly include: display devices, smart windows, rearview mirrors, optical information storage and military camouflage, etc. Electrochromic devices have attracted extensive attention due to a series of advantages such as low energy consumption, improved comfort and safety in daily life. The most important thing in electrochromic devices is electrochromic materials. Therefore, electrochromic materials are widely studied as one of the most promising smart materials. Electrochromic materials are di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1514G02F1/153C01G23/047B82Y30/00B82Y40/00
CPCG02F1/1514G02F1/1533C01G23/047B82Y30/00B82Y40/00C01P2004/16
Inventor 曲小姝马超程振玉付玉杨艳艳初冬雪石丹
Owner JILIN INST OF CHEM TECH
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