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Flexible transparent conducting thin film based on graphene sandwich structure and preparation method thereof

A transparent conductive film, graphene film technology, applied in cable/conductor manufacturing, circuits, electrical components, etc., can solve the problems of reduced electrical conductivity, small grain size of graphene film, influence of electron transmission, etc., to increase electrical conductivity, Improve efficiency and flexibility, avoid brittle effects

Inactive Publication Date: 2015-07-01
XIAN JIAOTONG LIVERPOOL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]Compared with ITO-based solar cells, solar cells based on CVD prepared and transferred graphene thin films do not have an advantage in photoelectric conversion efficiency. The reason is that the graphene film grains prepared by the CVD method are relatively small, and due to the effect of the grain boundary, the electron transport is affected and the electrical conductivity is greatly reduced.

Method used

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  • Flexible transparent conducting thin film based on graphene sandwich structure and preparation method thereof
  • Flexible transparent conducting thin film based on graphene sandwich structure and preparation method thereof
  • Flexible transparent conducting thin film based on graphene sandwich structure and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) First, the copper foil was ultrasonically cleaned by isopropanol, acetone, ferric chloride, and deionized aqueous solution for 10 minutes, then placed on a quartz plate and placed in the center of the tube furnace together, under argon (500 sccm) and hydrogen (100 sccm) ) under the protection of a mixed atmosphere, the temperature was raised to 1000°C, and then annealed for 60mins. After that, the temperature was kept constant, and methane (30sccm) was introduced into the reaction chamber, and the metal was used to catalyze the methane, so that carbon atoms were deposited on the copper foil, and the reaction The time is 30mins, and then the temperature is rapidly lowered to obtain a graphene film layer grown on copper foil, and then a mixed solution of polymethyl methacrylate (PMMA) and acetone is spin-coated on one side of the graphene film layer, and after drying , into the ferric chloride solution to etch the copper foil substrate, and finally get the graphene f...

Embodiment 2

[0035] In Example 2, except for the following step (2), other steps (1) and (3) are the same as in Example 1, and the specific method of step (2) is as follows:

[0036] (2) Pour 20mL of sodium hydroxide (300mol / L), 1mL of copper nitrate (10mol / L), 100μL of ethylenediamine (EDA) and 70μL of hydrazine hydrate into the flask in turn, shake well, and then place the flask at 80 Heating in a water bath at ℃ temperature, and magnetic stirring continued for 0.5h at the same time, until the color of the bottom solution was colorless and clear, then continued gentle magnetic stirring for 6mins, and began to grow copper nanowires floating on the surface of the solution until the bottom solution turned red, and the reaction was over. Then pour the solution into a centrifuge tube, and inject polyvinylpyrrolidone (PVP), centrifuge to make the nanowires and polyvinylpyrrolidone layered, put the centrifuge tube in an ice bath, and finally take out the copper nanowires, and repeatedly wash...

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Abstract

The invention discloses a flexible transparent conducting thin film based on a graphene sandwich structure. The flexible transparent conducting thin film is characterized by comprising at least two layers of graphene film layers and copper nano-wire layers which are alternately arranged between the adjacent graphene film layers. The flexible transparent conducting thin film provided by the invention is simple in preparation method, a traditional ITO (Indium Tin Oxide) transparent electrode can be replaced by the graphene / the copper nano-wire / the graphene sandwich structure with high transparency, high conductivity and flexibility, the defects that a traditional material is high in manufacturing cost and is likely to be crisped can be prevented, the efficiency and flexibility of a photoelectric device can be improved, the production cost of the photoelectric device can be reduced, and the transmission efficiency of electrons among graphene grains can be promoted by applying the copper nano-wires; meanwhile, compared with a graphene film, the conductivity of the transparent conducting thin film can be greatly improved, and the photoelectric conversion efficiency of a thin film solar cell can be improved.

Description

technical field [0001] The invention relates to a flexible transparent conductive film and a preparation method thereof, in particular to a flexible transparent conductive film based on a graphene interlayer structure and a preparation method thereof. Background technique [0002] The transparent electrode of solar cells requires high light transmittance and good current conduction function. The traditional transparent electrode is indium tin oxide (ITO). Compared with other materials, ITO has high light transmittance and low The sheet resistance meets the requirements of the electrode for efficiently transmitting light energy and conducting current. However, for conventional transparent electrodes, when the thickness of the film is increased in order to reduce the sheet resistance, the light transmission rate will decrease with the increase of the thickness. In addition, traditional transparent electrodes are brittle and fragile, and optoelectronic devices manufactured ...

Claims

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Application Information

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IPC IPC(8): H01B1/04H01B13/00H01L31/0224
Inventor 吴京锦赵策洲赵胤超
Owner XIAN JIAOTONG LIVERPOOL UNIV
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