Nanowire-based flexible transparent conducting electrode and preparation method thereof

A technology of transparent conductive electrodes and nanowires, applied in the direction of conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, circuits, etc., can solve the problem of material consumption environment, difficulty in wire processing, nanowire breakage or shedding, etc. problems, achieve the effect of no inert gas protection, convenient and quick molding, and material cost saving

Inactive Publication Date: 2015-09-02
GUANGZHOU INST OF ADVANCED TECH CHINESE ACAD OF SCI +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

This technology mainly has three shortcomings: 1. A large amount of solvent needs to be used in the process of nanowire deposition or coating, which brings additional material consumption and environmental pollution; During the process, due to the stress mismatch, the nanowires are likely to break or fall off, resulting in conductive defects in the composite material; 3. This technology can only be used for the preparation of conductive films, and it is difficult to realize the processing of wires with complex structures, let alone 3D printing.
[0004] In addition, although the current technology also proposes to prepare a transparent conductive film on a flexible substrate, that is, a solution that does not need to be torn off after photocuring, this solution avoids the breakage and shedding of the wires of the photopolymer / nanowire composite material, but The existence of the substrate increases the cost of flexible transparent conductive materials, and also reduces the advantages of photopolymer / nanowire composite materials, and the existing solutions generally require the use of anti-oxidant polymerization inhibitors, which increases material costs and molding complexity

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  • Nanowire-based flexible transparent conducting electrode and preparation method thereof

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[0026] The invention provides a method for preparing a flexible transparent conductive electrode based on nanowires, which includes the following steps: uniformly dispersing the nanowires in a mixed liquid composed of a monomer, a photoinitiator and a surfactant, and then placing the mixed liquid in In the mold and placed under the light source, the mixed solution undergoes photopolymerization under light to induce nanowires to aggregate and solidify into shape.

[0027] As a further preferred embodiment, the mold is made of a flexible polymer film (such as PET) or polydimethylsiloxane, or hard glass, or a transparent container with a complex structure.

[0028] As a further preferred embodiment, the light source may be a continuous spectrum light source or a laser, and the light source may be ultraviolet light or visible light.

[0029] Further as a preferred embodiment, the monomers are methyl methacrylate, butyl acrylate, isooctyl acrylate, tripropylene glycol diacrylate, t...

Embodiment 1

[0044] Silver nanowires with a diameter of 40 nm and an aspect ratio of 800 with a volume fraction of 0.02% were added to the mixture containing monomers, surfactants and photoinitiators. Among them, the monomer adopts methyl methacrylate and pentaerythritol tetraacrylate with a mass ratio of 3:1, the surfactant adopts cetyl mercaptan which accounts for 5% of the total monomer mass, and the photoinitiator adopts 1.5% of the total monomer mass. % TPO. The mixed liquid is uniformly mixed by ultrasonic and then coated on the PDMS mold, and the mixed liquid is subjected to photopolymerization reaction by ultraviolet light and then cured to form a flat linear flexible transparent conductive electrode.

Embodiment 2

[0046] Copper nanowires with a diameter of 80 nm and an aspect ratio of 200 with a volume fraction of 0.5% were added to the mixture containing monomers, surfactants and photoinitiators. Among them, the monomer is isooctyl acrylate, pentaerythritol tetraacrylate and trimethylolpropane tris (3-mercaptopropionate) with a mass ratio of 5:4:1, and the surfactant is 10% of the total mass of the monomer. 3,3'-carbonylbis(7-diethylaminocoumarin) accounting for 0.3% of the total mass of the monomer and N-phenylglycine accounting for 1% of the total mass of the monomer are used as the photoinitiator. The mixed solution is uniformly mixed by ultrasonic and then coated on the mold, and the mixed solution undergoes photopolymerization under visible light, and then solidified and formed to obtain a film-like flexible transparent conductive electrode.

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Abstract

The invention discloses a nanowire-based flexible transparent conducting electrode and a preparation method thereof. The preparation method includes dispersing nanowires in a mixed liquid composed of monomer, photo-initiator and a surface active agent uniformly and then disposing the mixed liquid in a mold and placing the mold under a light source. After being subjected to light, the mixed liquid undergoes polymerization reaction which induces the gathering of the nanowires and then the flexible transparent electrode is formed through solidification. According to the invention, by utilizing a principle that in situ photopolymerization induces the gathering of the nanowires, the flexible transparent electrode can be formed quickly and conveniently without a solvent, an oxygen inhibition preventing agent and inert gas shielding at a low production cost. Therefore, the method facilitates the construction of a complicated electrode structure and can be applied to flexible transparent conducting electrode manufacturing field widely.

Description

technical field [0001] The invention relates to the field of preparation of flexible transparent electronic materials, in particular to a flexible transparent conductive electrode based on nanowires and a preparation method thereof. Background technique [0002] Flexible transparent electronic material is a new material with unique flexibility, ductility and high-efficiency processability. It is widely used in the fields of information, energy, medical treatment and national defense. Although the common electrode material indium tin oxide (ITO) has high conductivity and good transparency, and is widely used in liquid crystal displays and organic light-emitting diodes, etc., ITO is rigid and brittle, and is not suitable as an electrode material for flexible electronic technology. The content of indium in the earth's crust is extremely low, and it is difficult to enrich it. As a strategic scarce resource, the supply in the civilian field has been decreasing year by year, maki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01B13/00C09D4/02C09D167/06
Inventor 彭海炎袁海曾德文钱小立
Owner GUANGZHOU INST OF ADVANCED TECH CHINESE ACAD OF SCI
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