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Method for preparing grapheme transparent conducting films by electrophoretic deposition

A technology of transparent conductive film and graphene film, which is applied in electrophoretic plating, electrolytic coating, coating, etc., can solve the problem of poor light transmittance of the film, and achieve less structural defects, good stability, and good light transmittance Effect

Inactive Publication Date: 2013-01-16
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method still has charged Mg 2+ It is difficult to remove from the graphene film, resulting in problems such as poor light transmittance of the film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042]1. Preparation of graphene dispersion

[0043] Measure 0.2 mL of AMP and 0.08 mL of deionized water into 20 mL of DMF to prepare AMP(1.0 vol.%) / water(0.4 vol.%) / DMF solution and mix well. Weighed 0.4 g of graphite powder and added it to the mixed solution, and then ultrasonically stripped it for 24 h (ultrasonic power 72 W). After sonication, the suspension was transferred to a centrifuge tube, and then centrifuged at 4000 rpm for 90 min with an 800-type centrifuge. Finally, take the supernatant of the centrifuge tube with a clean dropper and let it stand for use.

[0044] 2. Preparation of electrodes for electrophoretic deposition

[0045] The anode used for electrophoretic deposition is mechanically polished copper foil (copper foil thickness 0.1 mm), and the cathode used for electrophoretic deposition is copper foil that has been mechanically polished and then electroplated.

[0046] (1) Mechanical polishing of copper foil

[0047] Use sandpaper to polish the copp...

Embodiment 2

[0066] 1. Preparation of graphene dispersion

[0067] Measure 0.1 mL of AMP and 0.08 mL of deionized water into 20 mL of DMF to prepare AMP(0.5 vol.%) / water(0.4 vol.%) / DMF solution and mix well. Weighed 0.4 g of graphite powder and added it to the mixed solution, and then ultrasonically stripped it for 30 h (ultrasonic power 72 W). After sonication, the suspension was transferred into a centrifuge tube, and then centrifuged at 4000 rpm for 120 min with a 800-type centrifuge. Finally, take the supernatant of the centrifuge tube with a clean dropper and let it stand for use.

[0068] 2. Preparation of electrodes for electrophoretic deposition

[0069] The anode used for electrophoretic deposition is mechanically polished copper foil (copper foil thickness 0.1 mm), and the cathode used for electrophoretic deposition is copper foil that has been mechanically polished and then electroplated.

[0070] (1) Mechanical polishing of copper foil

[0071] Use sandpaper to polish the c...

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PUM

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Abstract

The invention relates to a preparation method of grapheme transparent conducting films, comprising the following steps: taking natural graphite powder as raw materials; ultrasonically stripping in 0.5-1.0% by volume of AMP, 0.4% by volume of water and DMF solution to prepare high-concentration grapheme dispersion liquid; taking the prepared grapheme dispersion liquid as electrolyte; preparing grapheme conducting films by electrophoretic deposition, transferring the grapheme conducting films onto a glass substrate; controlling the electrophoretic deposition voltage and the electrophoretic deposition time to prepare the grapheme conducting films with different thicknesses and improving light transmission and conductivity of the grapheme conducting films through the heat treatment and acid processing technology. The grapheme transparent conducting films prepared by the method has flat surface and less defect; the prepared grapheme transparent conducting films has the light transmittance of 82.1% and the film resistance of 1.0 microhm / sq. Compared with the other preparation method, the method has the advantages of simple operation, easy control and lower coat and is suitable for large-scale preparation.

Description

technical field [0001] The invention belongs to the field of carbon material preparation, and in particular relates to a method for preparing a graphene transparent conductive film by using an electrophoretic deposition method. Background technique [0002] As an important part of optoelectronic devices, transparent conductive films are widely used in liquid crystal displays (LCDs), organic solar cells, organic light-emitting diodes (LCDs) and other fields. Indium tin oxide (ITO) has become the main transparent conductive film material today due to its high electrical conductivity and light transmission. However, due to the high preparation cost of ITO, the scarcity of raw materials and the continuous rise in price, and the brittleness of ITO also makes it unable to meet the performance requirements of some new applications, it is urgent to develop alternative materials for ITO. [0003] Graphene's good electrical conductivity and light transmission make it have a good appl...

Claims

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Application Information

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IPC IPC(8): C25D13/02
Inventor 姚亚东尹光福宫溢超
Owner SICHUAN UNIV
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