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Graphene/ metal nanometer wire grid composite transparent conductive electrode and application

A technology of transparent conductive electrodes and metal nanowires, used in cable/conductor manufacturing, conductive layers on insulating carriers, circuits, etc.

Inactive Publication Date: 2016-07-27
江苏天贯碳纳米材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, if the metal grid is prepared by the cheapest screen printing process, new problems will arise again, because the transparent conductive electrode of graphene / metal grid composite requires metal The height of the grid is usually on the order of nanometers, and the height of the metal grid prepared by even the finest screen printing equipment is too high. If it is applied to the smart dimming film, it will make the smart dimming film The first and second electrode units of the device are in direct contact, so that the intelligent dimming film product is scrapped
For example, the patent "a large-area low-resistance solar cell conductive base and its preparation method, CN102881459A" has shown that the use of screen printing equipment to print conductive silver paste to prepare metal grids for the conductive base of solar cells, the silk screen method prepared It is feasible for the metal grid to be used for current collection of solar cells, but it is difficult to apply it to the transparent conductive electrode of the smart dimming film due to the high height of the screen-printed metal grid

Method used

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  • Graphene/ metal nanometer wire grid composite transparent conductive electrode and application
  • Graphene/ metal nanometer wire grid composite transparent conductive electrode and application
  • Graphene/ metal nanometer wire grid composite transparent conductive electrode and application

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preparation example 1

[0063] Preparation Example 1: Preparation of silver nano screen printing ink

[0064] The synthesis of silver nanowires refers to the literature "The effect of nanowire length and diameter on the properties of transparent, conducting nanowire films, Nanoscale, 2012, 4, 1996". Four silver nanowires with different diameters and lengths were prepared.

[0065]

[0066] The synthesized silver nanowires were dispersed in a solvent with a mass fraction of 2:5 n-hexanol and n-butanol, and then hydroxypropyl methylcellulose and fluorocarbon surfactant were added to adjust the rheological parameters. In the final ink, the mass fraction of silver nanowires was 1%, the mass fraction of hydroxypropyl methylcellulose was 5%, and the mass fraction of fluorocarbon surfactant was 0.005%.

preparation example 2

[0067] Preparation Example 2: Preparation of Graphene Coating Solution

[0068] Thermally expandable graphite powder or microcrystalline graphite or natural graphite (1 part quality) is joined in the N-methylpyrrolidone solvent (2000 parts), ultrasonic 45min in the supersonic instrument of 300w power, use the dispersion liquid that obtains at 500 Centrifuge for 60 min at a speed of rpm to discard the thick graphite sheet at the bottom to obtain a gray sol in the upper layer. The gray sol in the upper layer is centrifuged at a speed of 5000 rpm, and a black graphene sol is obtained at the bottom, which is used to prepare a graphene-containing film. The obtained sol was prepared as a dispersion liquid with a concentration of 0.5 mg / ml, and the solvent of the dispersion liquid was N-methylpyrrolidone.

preparation example 3

[0069] Preparation Example 3: Preparation of Graphene Oxide Coating Solution

[0070] Treat natural graphite powder (2 parts by mass), concentrated sulfuric acid (90 parts by mass) and potassium permanganate (10 parts by mass) under ice bath conditions for 3 hours, raise the temperature to about 35°C, keep it for 30 minutes, and slowly add 100 parts Quality water, keep the temperature at about 95°C, add 40 parts by weight of water within 45 minutes, then add 10 parts by weight of 30% hydrogen peroxide and 100 parts by weight of water to obtain a bright yellow suspension. The suspension was filtered, the filter cake was washed 3 times with hydrochloric acid with a mass fraction of 5% by weight, and the obtained filter cake was dried at 60° C., and the obtained filter cake was dispersed in water to obtain a graphene oxide sol, which was centrifuged and separated. Re-disperse, after multiple treatments (generally more than 3 times) to obtain a relatively pure graphene oxide sol...

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Abstract

The invention discloses a graphene / metal nanometer wire grid composite transparent conductive electrode and an intelligent light modulation film device based on the transparent conductive electrode and a preparation method for the same. The graphene / metal nanometer wire grid composite transparent conductive electrode at least comprises a transparent substrate, a metal nanometer filament grid conductive layer and a graphene layer. The metal nanometer filament grid is not an entity metal mesh grid, but a patterned grid shape which is obtained through silk-screen printing which prints the metal nanometer filament; and a micro-network consisting of metal nanometer filaments which are in overlap joint forms a specific path in the grid. The graphene / metal nanometer wire grid composite transparent conductive electrode and application abandon the traditional technology of using conductive slurry as oil ink to print a metal grid, abandon the technology of coating the metal nanometer filaments on the whole plate and then performing etching, instead, the graphene / metal nanometer wire grid composite transparent conductive electrode and application directly adopt the metal nanometer oil ink to print a patterning grid line through the silk-screen printing. The preparation method of the invention can reduce the usage quantity of the silver nanometer filament, enables the height of the conductive grid to only have the nanometer scale, and can effectively prevent the failure caused by the contact between the first electrode unit and the second electrode unit of the light modulation film while enhancing the grapheme conductivity capability.

Description

[0001] Field of the invention: the present invention relates to the field of transparent conductive electrodes, especially the application and preparation method of transparent conductive electrodes in the field of intelligent dimming films. technical background: [0002] In order to obtain better light adjustment effect in the field of smart dimming film, it is usually required that the conductive layer in the conductive electrode should completely cover the substrate, so that the entire dimming layer is within the range of current or electric field; while in touch screen applications , the conductive layer only needs to form fine X and Y scanning electrode patterns. In some cases, the duty ratio of the conductive layer in the transparent conductive electrode in the touch screen can reach 99%. [0003] Traditional ITO transparent conductive electrodes are slowly being replaced by new ITO substitutes because of their inflexibility and scarcity of indium elements. The curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B5/14H01B13/00
Inventor 赵庆生王丽霞刘腾蛟胡源李丽坤
Owner 江苏天贯碳纳米材料有限公司
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