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Electrochromic film and preparation method and application thereof

An electrochromic, thin film technology, applied in nonlinear optics, instruments, optics, etc., can solve problems such as poor performance, and achieve the effect of improving electrochromic performance and optical contrast

Inactive Publication Date: 2019-07-30
EAST CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention is aimed at the problem of poor performance of PEDOT:PSS film used alone on electrochromic devices, and provides a water-soluble polymer: polyethylene oxide (PEO) to improve the ion conductivity of PEDOT:PSS, so that PEO / PEDOT:PSS blend film has ion-electronic mixed conductive properties, so as to realize the preparation method of improving the electrochromic response ability and optical contrast of the film

Method used

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

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Embodiment 1-3

[0031] A certain amount of dimethyl sulfoxide (DMSO) and water were added to the PEDOT:PSS aqueous dispersion. The volume ratio of DMSO and PEDOT:PSS aqueous dispersion in the mixed solution is 5%.

[0032] Add PEO powder to the above solution. In embodiment 1, the quality of PEO in PEO / PEDOT:PSS blend is 20 parts; In embodiment 2, the quality of PEO in PEO / PEDOT:PSS blend is 40 parts; In embodiment 3, PEO / PEDOT : The quality of PEO in the PSS blend is 60 parts.

[0033] Stir and dissolve the above mixture evenly to form a mixed dispersion. The mixed dispersion liquid was filtered with a filter device.

[0034] The filtered dispersion liquid was dried at 50° C. to form a film to obtain a PEO / PEDOT:PSS blend film.

[0035] The electrical conductivity of the prepared PEO / PEDOT:PSS blend membrane was tested by electrochemical workstation. The results are listed in Table 1.

[0036]The PEO / PEDOT:PSS mixed dispersion was coated on an ITO glass plate, dried at 50°C to form a f...

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Abstract

The invention relates to an electrochromic film and a preparation method thereof. The electrochromic film is prepared by adopting poly (3, 4-ethylenedioxythiophene): poly (styrenesulfonate) (PEDOT: PSS) and polyethylene oxide (PEO) through a simple solution blending method. The electrochromic film has the beneficial effects that abundant paths can be provided for ion transport to PEDOT molecular chains by means of the PEO, so that the ion transport capacity of the PEO / PEDOT: PSS blended film disclosed by the invention is improved; by combining with the electronic conductivity of the PEDOT: PSSper se, the PEO / PEDOT: PSS blended film has a good ion-electron mixed conductive property; and the electrochromic reaction capability and the optical contrast of the PEDOT: PSS film are increased bymeans of the PEO / PEDOT: PSS ion-electron mixed conductive blended film. The preparation method has the beneficial effects of low requirements on equipment, low production cost, energy saving and environmental protection and can be used for the research and development and the production of related electrochromic products.

Description

technical field [0001] The invention belongs to the technical field of electrochromism, and in particular relates to an electrochromic film based on a PEO / PEDOT:PSS blend, a preparation method and an application thereof. Background technique [0002] Electrochromic materials are currently recognized as the most promising class of intelligent materials, which can change color under the action of alternating high and low or positive and negative electric fields. Due to its unique optical properties, it has broad application prospects in many fields such as flexible displays, color-changing smart windows, and variable reflectivity mirrors. The color change reaction of electrochromic materials is caused by oxidation / reduction reactions, which is related to the injection / extraction of ions in the electrolyte. In order to make the electrochemical reaction significant, the electrochromic material needs to have ion conductivity in addition to its electrical conductivity. Therefore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1516
CPCG02F1/1516G02F1/15165
Inventor 邹淑芬吕瑞华那兵柳和生符宽
Owner EAST CHINA UNIV OF TECH
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