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Metal nano wire transparent conductive film and preparation method thereof

A technology of transparent conductive film and metal nanowire, applied in the direction of metal/alloy conductor, conductive material, conductive material, etc. The performance is not as good as that of metal nanowires, and the experimental conditions are easy to control, flexible development is satisfied, and the operation is simple.

Inactive Publication Date: 2016-03-23
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is simple to operate, but there are many problems, such as the poor adhesion between the metal nanowires and the substrate, and the metal nanowires are easily peeled off from the substrate.
In addition, due to the insufficient stacking of metal nanowires, the contact resistance between nanowires is relatively large, which affects the overall conductivity of the film.
[0004] At present, the commonly used ways to improve adhesion and conductivity are: adding a layer of covering on the surface of metal nanowires, such as the Chinese patent CN104867618A, which covers a layer of graphene on the surface of metal nanowires. Due to the defects of graphene itself and the grain boundaries The existence of metal nanowires, its conductivity is not as good as that of metal nanowires, and its covering on the surface of metal nanowires will reduce its conductivity, and at the same time have a greater impact on the overall light transmittance of the film; another example, adding bonding between metal nanowires Adding a cellulose layer between the substrate and the metal nanowires, such as the Chinese patent CN104217788A, not only increases the complexity of the operation, but also has a greater impact on the overall thickness, roughness, and light transmittance of the film; in addition, Through the transfer method, as described in Chinese patent CN103594195A, the transparent flexible substrate is used to peel off the metal nanowires, trying to embed the metal nanowires in the flexible substrate. The whole operation is relatively complicated, and the peeling is not clean, and a large number of metal nanowires are buried in the substrate. However, the problem that seriously affects the conductivity of the film

Method used

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  • Metal nano wire transparent conductive film and preparation method thereof
  • Metal nano wire transparent conductive film and preparation method thereof
  • Metal nano wire transparent conductive film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Step 1. Disperse the prepared metallic silver nanowires in ethanol to prepare 10 mg / ml metallic silver nanowires, mix them with 1 mg / ml CTAB solution, and ultrasonicate for 3 minutes after mixing to obtain positively charged metallic silver Nanowires;

[0030] Another 10 mg / ml metallic silver nanowire was mixed with 1 mg / ml SDBS solution, and then ultrasonically treated for 3 minutes after mixing to obtain negatively charged metallic silver nanowire.

[0031] Step 2. Repeatedly ultrasonically clean the PET substrate with deionized water, ethanol, and isopropanol, and treat it with oxygen plasma for 20 minutes, and dry it with nitrogen; Slowly immerse and pull in the wire suspension, then rinse with deionized water, and then dry at 50°C for 100 min; then dip and pull the substrate in the positively charged graphene solution at the same speed, and then Rinse with deionized water, and then dry at 50°C for 100 minutes. The prepared metal nanowire anion and cation film is s...

Embodiment 2

[0034] Step 1. Disperse the prepared metallic silver nanowires in ethanol to prepare 5 mg / ml metallic silver nanowires, mix them with 1 mg / ml CTAB solution, and ultrasonicate for 3 minutes after mixing to obtain positively charged metallic silver Nanowires;

[0035] Another 5 mg / ml metallic silver nanowire was mixed with 1 mg / ml SDBS solution, and then ultrasonically treated for 3 minutes after mixing to obtain negatively charged metallic silver nanowire.

[0036] Step 2, the glass substrate is repeatedly ultrasonically cleaned with deionized water, ethanol, and isopropanol, and treated with oxygen plasma for 20 minutes, and dried with nitrogen; the negatively charged silver nanowire suspension prepared in step 1 is Spin-coat on the surface of the PET substrate at a speed of 1200 rpm, and then dry at 200°C for 1 min; then spin-coat the positively charged silver nanowire suspension prepared in step 1 on the surface of the glass substrate at the same speed, Then dry at 200°C fo...

Embodiment 3

[0039] Step 1. Disperse the prepared metallic silver nanowires in ethanol to prepare 0.01 mg / ml metallic silver nanowires, mix them with 1 mg / ml dodecyltrimethylammonium chloride solution, and mix them at 30 degrees Celsius Stir for 3 hours to obtain positively charged metallic silver nanowires;

[0040]Another 0.01 mg / ml metallic silver nanowire was mixed with 1 mg / ml SDBS solution, and stirred at 30 degrees Celsius for 3 hours after mixing to obtain electronegative metallic silver nanowire.

[0041] Step 2. Repeatedly ultrasonically clean the plexiglass substrate with deionized water, ethanol, and isopropanol, and treat it with oxygen plasma for 20 minutes, and dry it with nitrogen; suspend the negatively charged silver nanowires prepared in step 1. The solution was scraped on the surface of a clean plexiglass substrate with a Meyer rod at a speed of 1 cm / s, and then dried at 100°C for 20 minutes; then the positively charged silver nanowires prepared in step 1 were scraped o...

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Abstract

The invention discloses a metal nano wire transparent conductive film and a preparation method thereof. The method comprises the following steps: preparing two completely same metal nano wire suspending liquids, respectively adding electrolytes with opposite electric properties into the two suspending liquids to enable surfaces of metal nano wires in the two suspending liquids to respectively carry positive charge and negative charge, and afterwards, performing alternative precipitation to prepare the multi-layer metal nano wire film on the surface of a substrate through a spin coating method, a spray method, a scrape coating method or a dipping-coating method. According to the invention, the technical approach is simple, the operation is convenient, the cost is quite low, the effect of static interaction precipitation is taken into full consideration, and the uniformity of the metal nano wire film and the adhesiveness of the substrate are greatly improved. At the same time, the metal nano wire film is enabled to have quite good conductivity and light transmittance, can be applied to large-scale production, and can be applied to the photoelectric fields such as an organic light emitting diode (OLED), a solar battery, a sensor, a touch screen and the like as an electrode.

Description

technical field [0001] The invention relates to the field of conductive film preparation, in particular to a metal nanowire transparent conductive film and a preparation method thereof. Background technique [0002] In recent years, metal nanowire films have attracted widespread attention due to their excellent electrical conductivity and flexibility, and have great potential to replace ITO, which is widely used at present, as electrode materials for OLEDs, touch screens and solar cells. [0003] At present, the commonly used preparation method of the metal nanowire thin film is to directly prepare the suspension liquid dispersed with the metal nanowire on the substrate by spin coating, spray coating, doctor blade coating, etc., and then directly dry it. This method is simple to operate, but there are many problems, such as the poor adhesion between the metal nanowires and the substrate, and the metal nanowires are easily peeled off from the substrate. In addition, due to t...

Claims

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Application Information

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IPC IPC(8): H01B1/02H01B13/00
CPCH01B1/026H01B13/00
Inventor 连璐吴欣凯韦冰五何谷峰
Owner SHANGHAI JIAO TONG UNIV
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