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Metal nanowire-antioxidation material composite transparent conductive film and preparation thereof

A metal nanowire, transparent conductive film technology, applied in the direction of metal/alloy conductors, oxide conductors, non-metallic conductors, etc., can solve the problems of decreased electrical conductivity and optical clarity, poisoning of substrate materials, complicated preparation methods, etc. , to achieve the best sheet resistance and transmittance, good chemical stability, and rich material sources.

Inactive Publication Date: 2017-01-04
GUANGDONG NANOLUTION SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many problems in the use of ITO, mainly in the following aspects: First, indium is a rare and precious metal, and the development of technology has brought about worldwide demand, making it in short supply
Second, its preparation method is very expensive. For example, the prepared target material is as high as nearly 10,000 yuan per kilogram. The preparation methods such as sputtering, evaporation deposition, and pulsed laser deposition are very complicated, and the equipment requirements are very high. High vacuum and high precision are required. Stoichiometric ratio control and strict oxide structure and morphology control make process control difficult
Third, the oxide film such as ITO is a brittle crystalline material, which will be damaged when the stress is applied, resulting in a significant decrease in its electrical conductivity and optical clarity (the electrical conductivity will drop by several orders of magnitude), which greatly restricts its use. , There are great restrictions on the application of new touch screens, flexible screens and other flexible conductive transparent films. This is the shortcoming of all oxide-based transparent conductive films.
Fourth, the heavy metal indium is toxic and will be harmful to the human body during the preparation and application process; in addition, the atomic weight of Sn and In is large, and it is easy to penetrate into the substrate during the film formation process, poisoning the substrate material, especially in liquid crystal display devices Pollution is so serious that the use is limited
Fifth, ITO will be reduced in an environment such as hydrogen, and hydrogen is necessary for the preparation of solar cells. ITO reduction will reduce the efficiency of solar cells

Method used

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  • Metal nanowire-antioxidation material composite transparent conductive film and preparation thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 0.1 μM AgNO 3 Mix with 0.1 micromole of copper chloride, add appropriate amount of ethylene glycol and appropriate amount of PVP with appropriate molecular weight, heat to 140°C, and keep for 40 minutes to obtain silver nanowires with a diameter of 40 nanometers and a length of 18-25 microns. Add 40-mesh flake graphite powder into the aqueous solution, and stir with a high-speed disperser to obtain a graphene aqueous solution, wherein in the graphene solution, graphene sheets below 5 layers occupy 60-70%.

[0045] A 50-micron PET film was hydroxylated with 20% sodium hydroxide, then simultaneously modified with a mercaptosilane coupling agent and an aminosilane coupling agent, and coated with silver by spin coating (large-area films are also prepared by ramp coating). The nanowire dispersion liquid was dried at 120° C., and then the graphene dispersion liquid was spin-coated and treated at 180° C. for 1 minute to obtain a silver nanowire graphene transparent conductive ...

Embodiment 2

[0047] The silver nanowire dispersion was prepared according to the method in Example 1. Use concentrated sulfuric acid and potassium permanganate to oxidize 50-mesh flake graphite powder, obtain a graphene oxide solution after ultrasonic dispersion, and reduce it with hydrazine hydrate to form a graphene solution.

[0048] The 50-micron flexible glass is treated with a mixture of concentrated sulfuric acid and hydrogen peroxide, then hydroxylated, then modified with mercaptosilane and aminosilane at the same time, and then spin-coated (large-area films can also be coated with curtain coating or gravure coating) Preparation) Coating the silver nanowire dispersion, treating at 120°C for one minute, then spin-coating the graphene dispersion, and treating at 180°C for one minute. The silver nano-graphene wire composite transparent conductive film has a square resistance of 50 ohms, a light transmittance of 89%, and a conductivity drop of less than 0.2% in 200 days in a pure oxyge...

Embodiment 3

[0050] The silver nanowire dispersion was prepared according to the method in Example 1, the zinc oxide nanoparticle sol was purchased, and the two dispersions were mixed.

[0051] The 50-micron flexible glass is treated with a mixture of concentrated sulfuric acid and hydrogen peroxide, then hydroxylated, modified with mercaptosilane and aminosilane at the same time, and then spin-coated (large-area films can also be coated with curtain coating or gravure coating) Preparation) Coating the mixed dispersion of silver nanowires and nano-zinc oxide, treating at 120°C for one minute, and treating at 180°C for one minute, the sheet resistance of the composite transparent conductive film is 50 ohms, and the light transmittance is 92%, under the pure oxygen environment of 200°C After 200 days, the conductivity drops below 0.2%, and there are conductive points down to the level of 1 nanometer; after bending 10,000 times (diameter 2mm), the conductivity drops below 2%, and the haze is l...

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Abstract

The invention relates to the technical field of transparent electrodes, and specifically discloses a metal nanowire-antioxidation material composite transparent conductive film. The conductive film comprises a high-conductivity transparent metal nanowire and an antioxidation material continuous film which covers the outer side of a metal nanowire grid and used for isolating the air. The antioxidation material is graphene or conductive nanocrystalline metal oxide. The conductive film provided by the invention belongs to a transparent conductive film of a new generation, is abundant in material resources, is relatively easy to prepare, is low in cost, is high in cost performance, is good in flexibility, is poisonless, is resistant to environment, is good in chemical stability, is not easy to reduce, and has the best square resistance, light transmittance and flexibility.

Description

technical field [0001] The invention relates to the technical field of transparent electrodes, in particular to a metal nanowire-anti-oxidation material composite transparent conductive film and its preparation. Background technique [0002] Transparent conductive materials are a class of transparent materials with conductive functions, which have been widely used in many industrial fields, such as transparent antistatic sealing materials for the electronics industry, transparent electrode materials, electrochromic display materials, smart window materials, transparent electrothermal materials, Nonlinear optical materials and transparent anti-electromagnetic radiation materials, etc. The most widely used transparent oxide film in industry is indium tin oxide (ITO film) film for short. ITO film is an important photoelectric material with both light transmission and conductivity, and has good conductivity (resistivity ρ is about 10 -4 Ω·cm), transparent to visible light (the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B5/14H01B13/00H01B1/02H01B1/04H01B1/08
CPCH01B5/14H01B13/00H01B1/02H01B1/04H01B1/08
Inventor 段镶锋段曦东
Owner GUANGDONG NANOLUTION SCI & TECH CO LTD
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