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Method for improving conductivity of silver nanowire flexible and transparent conductive membrane

A transparent conductive film, silver nanowire technology, applied to conductive layers, circuits, electrical components and other directions on insulating carriers, can solve problems such as not being well solved, and achieve improved matching, improved conductivity, and simple operation. Effect

Inactive Publication Date: 2016-05-11
SHENZHEN INST OF ADVANCED TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Patent No. CN104134484.A discloses a flexible transparent conductive film based on nano-silver wire and its preparation method. This patent treats the silver nano-wire conductive layer with a dispersion liquid containing nano-titanium dioxide, so that the nano-titanium dioxide particles penetrate into the silver nanowire grid. To a certain extent, the conductivity of the silver nanowire conductive film can be improved, but the problem that the silver nanowire flexible transparent conductive film has both ideal conductivity and high light transmittance has not been well resolved.

Method used

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  • Method for improving conductivity of silver nanowire flexible and transparent conductive membrane
  • Method for improving conductivity of silver nanowire flexible and transparent conductive membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Using PVA as the matrix, put it into a three-necked flask according to the mass ratio of PVA:H2O=1:10, heat and stir in a water bath at 80°C for 3 hours, and cool to room temperature to obtain a PVA aqueous solution for later use.

[0030] Use a PET film or a glass sheet substrate, and evenly coat the prepared silver nanowire solution on the substrate with a Mayer rod. After the silver nanowire layer is naturally dried, spread the PVA aqueous solution on the silver nanolayer, and then transfer it to the silver nanowire layer as a whole. In a vacuum drying oven, under vacuum, dry at 40°C and 70°C for 2 hours respectively. After solidifying and cooling the PVA film on the surface, peel the PVA film on the surface from the substrate to obtain silver nanowires embedded in the PVA surface. Nanowire flexible transparent conductive film.

[0031] Take 0.01-0.03g of silver nitrate and add it to 50mL of ethanol of analytical grade, electromagnetically stir it to make it fully di...

Embodiment 2

[0034] Silver source—weak reducing agent treatment solution on the treatment effect of silver nanowire flexible transparent conductive film with different diameters:

[0035] According to the method of embodiment 1, configure the flexible transparent conductive film of silver nanowire diameter about 20nm, 35nm, 70nm, after adopting freshly prepared silver source-weak reducing agent treatment liquid to process, its result is as shown in table 1:

[0036] Table 1 Silver source-weak reducing agent treatment solution to treat flexible transparent conductive films with different diameters of silver nanowires

[0037]

[0038] From the results in Table 1, it can be seen that the conductivity (expressed in square resistance) of flexible transparent conductive films of silver nanowires with different diameters has been significantly improved after treatment with silver source-weak reducing agent treatment solution, and the light transmittance of the conductive films Without obvious...

Embodiment 3

[0040] Silver source—weak reducing agent treatment solution to test the treatment effect of silver nanowire flexible transparent conductive film with different conductivity:

[0041] Select Mayer rods of different specifications to coat silver nanowires with a diameter of about 20nm at the same concentration on the substrate, and other steps are the same as in Example 1 to obtain flexible transparent conductive films of silver nanowires with different conductivity. Weak reducing agent treatment liquid is processed, and the obtained result is as shown in table 2:

[0042] Table 2 Treatment effect of silver source-weak reducing agent treatment solution on silver nanowire flexible transparent conductive film with different conductivity

[0043]

[0044] It can be seen from Table 2 that the method of the present invention has obvious effects on the treatment of flexible transparent conductive films of silver nanowires with different conductive properties, and the improvement of...

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Abstract

The invention relates to the technical field of a nanometer material, and particularly discloses a method for improving the conductivity of a silver nanowire flexible and transparent conductive membrane. The method comprises the following steps of coating a substrate with a silver nanowire dispersing solution to form silver nanowire lattices; spreading a matrix liquid on a silver nanowire layer, and drying, curing, cooling and stripping a matrix to obtain the silver nanowire flexible and transparent conductive membrane; and humidifying the silver nanowire flexible and transparent conductive membrane with a silver source-weak reducing agent processing liquid prepared freshly, and rapidly drying and processing the silver nanowire flexible and transparent conductive membrane, wherein a weak reducing agent is one of dopamine, ascorbic acid or sodium citrate. According to the method, silver nitrate is taken as a silver source, homogenous microparticles-silver nanoparticles which are firmly combined are in situ formed in the silver nanowire lattices, and thus, the conductivity of the silver nanowire flexible and transparent conductive membrane can be remarkably improved; and moreover, the processing light transmission is not obviously changed, and thus, the matching degree between the light transmission and the conductivity of the silver nanowire flexible and transparent conductive membrane is improved.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a method for improving the conductivity of a silver nanowire flexible transparent conductive film. Background technique [0002] As one of the core components of electronic devices, transparent conductive films have important applications in the field of touch screens. The most widely used transparent conductive film is indium tin oxide (ITO), but there are some disadvantages in the production and application of ITO. First, due to the increasing scarcity of indium resources and the complex process of sputtering indium tin oxide onto the substrate, the cost of ITO is increasing day by day. Secondly, due to the high brittleness of ITO, it is easy to break, making it difficult to meet the application requirements of flexible transparent conductive films. In recent years, silver nanowires have been extensively studied as an important substitute for ITO materials. Among them,...

Claims

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Application Information

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IPC IPC(8): H01B5/14H01B13/00
CPCH01B5/14H01B13/00
Inventor 彭海炎毕晓峰廖景文曾德文侯伟强袁海
Owner SHENZHEN INST OF ADVANCED TECH
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