Manufacture method fro transparent electrodes

Abstract

The invention provides a manufacture method for transparent electrodes, comprising steps of: (A) providing a carbon-insoluble substrate provided with a first surface; (B) forming a carbon solvent layer on the first surface of the substrate; (C) providing a carbon source; and (D) forming a plurality of graphene layers on the carbon solvent layer. Wherein the thickness of graphene layers is controlled by the carbon solvent layer, the carbon source is supplied by a carbon-containing gas, and is used for controlling the growth rate of the graphene layers.

Description

technical field [0001] The invention relates to a method for manufacturing a transparent electrode, in particular to a method for making a transparent electrode made of graphene, which can manufacture a graphene transparent electrode with high conductivity and high transparency. Background technique [0002] The Dutch scholar Andre Geim and the British Konstantin Novoselov became the winners of the 2010 Nobel Prize in Physics for their discovery of graphene, the thinnest material in the world. [0003] Graphene has a wide range of applications, such as IC circuits (replacing copper wires), transparent electrodes (replacing ITO), lithium-ion batteries (replacing anodes), supercapacitors (replacing graphite for electricity storage), super tires (replacing strengthened graphite Tim Ji), biological chip (replacing silicon), graphene diaphragm and so on. [0004] The use of graphene to make transparent electrodes is one of the most popular applications of graphene. South Korea'...

AI Technical Summary

Problems solved by technology

However, because copper is almost insoluble in carbon, the carbon decomposed by carbon-containing gas is deposited on the surface of copper, and only one or two layers of graphene can grow. In addition, there are many defects in it, so the conductivity is low

If carbon-containing gas is deposited on the surface of a soluble metal (such as nickel, cobalt, iron, palladium, or platinum) by vapor deposition, due to the high solubility of carbon, the number of graphene layers precipitated can exceed 100 layers, or even Tens of thousands of layers, so that the transparency of graphene is greatly reduced, making it difficult for light to pass through, and the light transmittance is not good.

[0007] Furthermore, after graphene is cooled from high temperature (1000°C), graphene hardly shrinks, but the shrinkage rate of the attached metal is very large (up to 1%), so the graphene attached to the metal will be compressed and wrinkled, Therefore, the light shining on the graphene will be absorbed in the creases and generate heat

In addition, the nucleation direction of graphene on the metal is different, so that the crystal lattice direction is staggered after the crystal grows, so that a lot of defects are formed at the junction of the grain boundary, including plug-in rows, pentagonal rings, heptagons...etc. , the carbon atoms that do not belong to the hexagonal ring will block the light and reduce the current, so it is difficult to make a transparent electrode

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