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Electromigration resistance silver nano wire composite film and preparation method thereof

A technology of silver nanowires and composite films, which is applied in the manufacture of cables/conductors, equipment for manufacturing conductive/semiconductive layers, circuits, etc. The protective layer of graphene sheets is not dense, etc., to achieve the effect of enhancing the ability of anti-electromigration, good compactness, and enhancing the ability of electromigration resistance

Active Publication Date: 2017-09-12
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the protective layer of inorganic particles or graphene sheets is not dense, it may even bring in impurity ions, and because the diameter of the silver wire is usually only tens of nanometers, the endurance time of the silver wire film in the electrified state is not long. , such as 200mA / cm (that is, the area is 1*1cm 2 A current of 200mA is passed into the surface of the film), and the silver wire film will fail within one day

Method used

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  • Electromigration resistance silver nano wire composite film and preparation method thereof
  • Electromigration resistance silver nano wire composite film and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 Preparation of Polyvinyl Alcohol Composite Silver Nanowire Transparent Conductive Film

[0019] 1) Disperse silver nanowires with a diameter of about 35nm in isopropanol, scrape-coat the film on a glass substrate, form a silver nanowire accumulation film on the substrate, and obtain a transparent conductive film of silver nanowires;

[0020] 2) dissolving polyvinyl alcohol in water, the concentration is 2wt%;

[0021] 3) spin-coat the polyvinyl alcohol solution on the surface of the prepared silver nanowire film, the rotation speed is 3000rpm, and the rotation time is 60s;

[0022] 4) Place the sample on a hot stage and dry it at 110°C for 10 minutes to remove the solvent in the polymer protective layer to obtain a silver nanowire composite film;

[0023] 5) When passing current into the silver nanowire composite film, place the current injection point on the polymer protective layer.

Embodiment 2

[0024] Embodiment 2 prepares chitosan composite silver nanowire transparent conductive film

[0025] 1) Disperse silver nanowires with a diameter of about 35nm in isopropanol, scrape-coat the film on a glass substrate, form a silver nanowire accumulation film on the substrate, and obtain a transparent conductive film of silver nanowires;

[0026] 2) dissolving the complex of chitosan and ascorbic acid in water, the concentration is 1wt%;

[0027] 3) Spin-coat the chitosan solution on the surface of the prepared silver nanowire film, the rotation speed is 3000rpm, and the rotation time is 60s;

[0028] 4) Place the sample on a hot stage and dry it at 110°C for 10 minutes to remove the solvent in the polymer protective layer to obtain a silver nanowire composite film;

[0029] 5) When passing current into the silver nanowire composite film, place the current injection point on the polymer protective layer.

Embodiment 3

[0031] 1) Dispersing silver nanowires with a diameter of about 35nm in isopropanol;

[0032] 2) dissolving the compound of chitosan and lactic acid in water, the concentration is 1wt%;

[0033] 3) Add the chitosan solution prepared in step 2 to the silver nanowire dispersion in step 1, mix evenly, and scrape the coating film on the glass substrate;

[0034] 4) Place the sample on a hot stage and dry it at 110°C for 10 minutes to remove the solvent in the polymer protective layer to obtain a silver nanowire composite film;

[0035] 5) When passing current into the silver nanowire composite film, place the current injection point on the polymer protective layer.

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Abstract

The invention belongs to the electronic material technology field and discloses an electromigration resistance silver nano wire composite film and a preparation method thereof. The silver nano wire composite film comprises a substrate, a silver nano wire accumulation film on the substrate and a polymer protection layer. When electricity is led to the silver nano wire composite film, an electricity lead-in point is at the polymer protection layer, and a surface of a silver nano wire at the electricity passing portion is protected by the polymer protection layer. The silver nano wire composite film is advantaged in that the surface of the silver nano wire accumulation film can be covered by the polymer protection layer, and the surface of the silver nano wire of the silver nano wire accumulation film can be further covered; in an electrification state, the electricity flows to the silver nano wire network through the polymer protection layer and does not directly flow into the silver nano wire network, the surface of the silver nano wire is respectively protected by the polymer protection layer wherever the electricity flows, so stability and the tolerance time of the silver nano wire in the electrification state can be improved, and electromigration resistance capability is enhanced.

Description

technical field [0001] The invention belongs to the technical field of electronic materials, in particular to an electromigration-resistant silver nanowire composite film and a preparation method thereof. Background technique [0002] The silver nanowires are randomly stacked on the substrate, and the formed network film has excellent electrical conductivity, excellent flexibility, and good compatibility with large-scale solution process. Therefore, silver nanowire film has become one of the materials with the most application potential in many new transparent conductive films. Using the silver nanowire film as an electrode, solar cells, light-emitting diodes, touch screens, displays, electronic paper, sensors, etc. can be prepared. It is well known that when these devices are in operation, current will flow through the electrodes. Under the action of current, the silver film, especially the silver near the positive electrode, will migrate, and the silver line will be disc...

Claims

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Application Information

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IPC IPC(8): H01B5/14H01B13/00
CPCH01B5/14H01B13/0026
Inventor 金云霞肖斐
Owner FUDAN UNIV
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