Planar silver nanowire transparent conductive thin film and preparation method thereof

A transparent conductive film, silver nanowire technology, applied in nanostructure manufacturing, conductive layer on insulating carrier, nanotechnology, etc., can solve problems such as surface is not flat enough, poor adhesion, etc.

Inactive Publication Date: 2011-06-08
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adhesion between silver nanowires and PET is poor. 3M tape test can stick most of the silver nanowires, and the surface is not flat enough, and the surface fluctuation may be as high as 30nm to 300nm, which is still far from practical application.

Method used

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  • Planar silver nanowire transparent conductive thin film and preparation method thereof
  • Planar silver nanowire transparent conductive thin film and preparation method thereof
  • Planar silver nanowire transparent conductive thin film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Using PET as a transparent substrate, take a specific volume of silver nanowire suspension in water and filter to form a uniform conductive network on the filter membrane. The filter film covered with the silver nanowire layer is used as a transfer film, and is pressed on the PET, and the filter film is removed after heat treatment to obtain a uniform silver nanowire conductive layer. Then the PEDOT:PSS aqueous solution was spin-coated at a speed of 1500 rpm for 15 seconds and dried at 120°C for 2 hours. The sheet resistance changes before and after spin coating PEDOT:PSS as Image 6 As shown, the visible transmittance before and after spin coating is as follows Figure 5 Shown. The 3M test after spin coating PEDOT:PSS showed that ( Figure 4 ), PEDOT:PSS coating is beneficial to improve the bonding ability of silver nanowire transparent conductive film and PET substrate.

[0021] The visible transmittance and sheet resistance of the transparent conductive film of silver...

Embodiment 2

[0023] Take ordinary float glass as a substrate, take a specific volume of silver nanowire suspension in water, filter, and form a uniform conductive network on the filter membrane. The filter film covered with the silver nanowire layer is used as a transfer film, and is pressed on the PET, and the filter film is removed after heat treatment to obtain a uniform silver nanowire conductive layer. Then the PEDOT:PSS aqueous solution was spin-coated at a speed of 1500 rpm for 15 seconds and dried at 120°C for 2 hours. The obtained transparent conductive film can pass the 3M tape adhesion test, and its visible light transmittance and square resistance are similar to those of Example 1.

[0024] The visible transmittance and sheet resistance of the transparent conductive film of silver nanowires on PET can be adjusted by the distribution density of silver nanowires. The distribution density of silver nanowires is 25mg / m 2 -318mg / m 2 . In the case of spin-coating PEDOT:PSS once, when t...

Embodiment 3

[0026] Use ordinary float glass as the substrate and use standard cleaning procedures to obtain a clean hydrophilic surface. Take a specific volume of ethanol suspension solution of silver nanowires, spin-coating at a speed of 1500 revolutions per minute for 15 seconds to form a uniform film on the glass, heat treatment for 1 hour to form a uniform silver nanowire conductive network. Then the PEDOT:PSS aqueous solution was spin-coated at a speed of 1500 rpm for 15 seconds and dried at 120°C for 2 hours. The obtained transparent conductive film can pass the 3M tape adhesion test, and its visible light transmittance is similar to that of Example 1 and Example 2, but the sheet resistance is about 40-60% higher under the same distribution density of silver nanowires.

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Abstract

The invention provides a planar silver nanowire transparent conductive thin film and a preparation method thereof. The transparent conductive thin film is characterized in that: a silver nanowire conductive layer which is arranged on a substrate is covered by a planar conductive polymer layer; the silver nanowire conductive layer realizes a conduction function; and the planar polymer layer fills holes in the silver nanowire conductive layer, so that the surface roughness is reduced and the firmness of the bonding of the silver nanowires and the substrate is improved. For example, the roughness of the silver nanowire transparent conductive thin film on the polyethylene terephthalate (PET) substrate is reduced to 25nm from 67nm when the conductive layer is not covered by using a poly(3,4-dioxy ethyl thiophene) / poly(styrene sulfonic acid) planar layer, the visible light transmittance reaches 77 percent when square resistance is 158, and good bonding force is guaranteed.

Description

Technical field [0001] The invention provides a transparent conductive film based on silver nanowires and a preparation method thereof. Background technique [0002] Transparent conductive film is a functional film with high visible light transmittance and certain conductivity. As a transparent electrode, it is widely used in liquid crystal displays, touch screens, electroluminescent devices and thin film solar cells, as well as antistatic coatings and electromagnetic shielding Floor. The transparent conductive film can achieve both high visible light transmittance and high conductivity at the same time, so it can ensure the simultaneous transmission of visible photons and carriers. So far, the transparent conductive material with the longest history of use and the best comprehensive performance is tin-doped indium oxide (ITO), which can achieve a square resistance of less than 10Ω and a resistivity of less than 10 when the visible light transmittance is 80%. 1.5×10 -4 Ωcm -1 ....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B5/14H01B13/00B82B1/00B82B3/00
Inventor 曾小燕卢灿忠
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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