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 conduct

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
Comparison scheme
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Example Embodiment

[0028] Example 1:

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

[0030] Take another 10mg / ml metallic silver nanowire, mix it with 1mg / ml SDBS solution, and sonicate for 3 minutes after mixing to obtain negative metallic silver nanowire.

[0031] Step two, the PET substrate is repeatedly ultrasonically cleaned with deionized water, ethanol, and isopropanol, and treated with oxygen plasma for 20 minutes, and then dried with nitrogen; the substrate is exposed to negatively charged metallic silver nanometers at a speed of 1cm / min. Slowly immerse and pull in the thread suspension, rinse with deionized water, and then dry at 50°C for 100 minutes; then immerse and pull the substrate in the positively charged graphene solution at the same speed, and then Rinse with d...

Example Embodiment

[0033] Example 2:

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

[0035] Take another 5 mg / ml of metallic silver nanowires, mix with 1 mg / ml of SDBS solution, and sonicate for 3 minutes after mixing to obtain negatively charged metallic silver nanowires.

[0036] Step 2: Wash the glass substrate with deionized water, ethanol, and isopropanol repeatedly ultrasonically, and treat it with oxygen plasma for 20 minutes, and dry it with nitrogen; the negatively charged silver nanowire suspension prepared in step 1 Spin coating on the surface of the PET substrate at a rotation speed of 1200 rpm, and then drying at 200°C for 1 min; and then spin the positively charged silver nanowire suspension prepared in step 1 on the surface of the glass substrate at the same rotation...

Example Embodiment

[0038] Example 3:

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

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

[0041] Step 2. The plexiglass substrate was 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 nanowires prepared in step 1 were suspended Scrape the liquid on the surface of the clean plexiglass substrate with a Meyer rod at a speed of 1cm / s, then dry it at 100°C for 20 minutes; then scrape the positively charged silver nanowires prepared in step one on the...

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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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