Hybrid electrode using silver nanowires and graphene, and preparation method thereof

A technology of mixed electrodes and silver nanowires, which is applied in the manufacture of cables/conductors, conductive layers on insulating carriers, circuits, etc., can solve the problems of fluorine-doped tin oxide electrodes with rising prices, complicated procedures, and high prices, and achieve chemical Excellent thermal stability

Active Publication Date: 2015-03-11
国立韩国交通大学校产学协力团
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  • Application Information

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Problems solved by technology

Moreover, the process of coating fluorine-doped tin oxide on the substrate is very complicated, and expensive vapor deposition or sputtering processes are used. Therefore, the price of fluorine-doped tin oxide electrodes rises, and it is necessary to develop an alternative to fluorine-doped tin oxide. tin technology
[0015] To date, transparent graphene composites have an electrical conductivity of 10, depending on the graphene content. -3 ~1S / cm, so it cannot be used as an electrode material for optoelectronic devices

Method used

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  • Hybrid electrode using silver nanowires and graphene, and preparation method thereof
  • Hybrid electrode using silver nanowires and graphene, and preparation method thereof

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preparation example Construction

[0034] Preparation method of mixed electrode

[0035]The invention provides a method for preparing a mixed electrode. The method for preparing the mixed electrode includes: a step of coating silver nanowires on a substrate; and a step of coating solution-type graphene on the substrate coated with the above-mentioned silver nanowires .

[0036] Moreover, according to another embodiment of the present invention, a method for preparing a mixed electrode is provided, and the method for preparing the above-mentioned mixed electrode includes: a step of coating silver nanowires on a substrate; a step of applying dissolved graphene oxide; and a step of reducing the above-mentioned graphene oxide.

[0037] Wherein, the above-mentioned substrate is not limited as long as it is a transparent and flexible material. In particular, the above-mentioned substrate is preferably selected from polyethylene terephthalate (PET), polyethersulfone (PES), polymethylmethacrylate, etc. One or more of...

preparation example

[0048] (1) Preparation of silver nanowires

[0049] As a method introduced in ACS Nano (American Chemical Society Nano, 2010, 4(5), 2955)), polyols were used to adjust the diameter and length, thereby synthesizing silver nanowires.

[0050] Specifically, 6.010 mmol of polyvinylpyrrolidone (PVP) and 84.032 mmol of potassium bromide (KBr) were put into a round-bottomed flask filled with 20 mL of ethylene glycol (EG), and synthesized.

[0051] For thermal stabilization, after heating the mixture at a temperature of 170° C. for one hour while stirring at 800 rpm (revolutions per minute), 0.349 mmol of AgCl powder was added, thereby generating primary Ag crystals (seeds). Five minutes later, a 1.295 mmol silver nitrate solution in ethylene glycol was titrated at 1 mL / min for ten minutes, and the silver nanowires were completely grown over 1 hour.

[0052] The mixture was cooled briefly to about 5°C and maintained at room temperature for 50 minutes. The resultant was purified by...

Embodiment 1

[0073] The reduced graphene solution was coated on the silver nanowire network to prepare the hybrid electrode.

[0074]Specifically, a silver nanowire solution with a diameter of about 35 nm and a length of about 30 μm was coated on a polyethylene terephthalate (PET) substrate by using a Meyor rod, and the silver nanowire The film is dried. Graphene oxide is reduced to graphene by immersing it in a hydrazine solution. The reduced graphene solution was spin-coated on the silver nanowire mesh at a speed of 1000 rpm. The thickness of the overcoated graphene film can be changed by adjusting the rotation speed. When the rotation speed is 1000rpm, the surface resistance reaches 165Ω / sq, and the light transmittance reaches 81%.

[0075] In silver nanowires having a network structure crossing each other, the nanowires cannot cover a part of the area of ​​the substrate, thus forming an "uncovered area" with non-conductive properties. Covering the graphene sheet in a region that ca...

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Abstract

The present invention relates to a hybrid electrode using silver nanowires and graphene, and a preparation method thereof, and more specifically, provides: a hybrid electrode comprising a silver nanowire network and graphene so as to have high light transmittance, improved surface resistance and electrocatalytic reactivity, and flexibility; and a preparation method thereof.

Description

technical field [0001] The present invention relates to a mixed electrode using silver nanowires and graphene and a preparation method thereof. Specifically, it relates to a technology for providing the following mixed electrode and a preparation method thereof: the above-mentioned mixed electrode includes a silver nanowire network and graphene, so that the above-mentioned mixed electrode The light transmittance is high, and the above-mentioned mixed electrode has improved surface resistance and flexibility. Background technique [0002] In a display device or a solar cell, a transparent electrode that transmits an image by transmitting light and generates an electric current is a core component. Currently, indium tin oxide (ITO) is most used as a transparent electrode. [0003] However, the usage of indium tin oxide is increasing year by year, and the corresponding raw ore reserves are not abundant enough, so it is expected that the corresponding raw ore will be exhausted ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B5/14H01B13/00H01L31/0224
CPCH01B1/04H01L51/442Y02E10/549Y02P70/50H10K30/82H01B5/14H01B13/00H01L31/0224
Inventor 金性龙李志勋阿尔-马蒙·穆罕默德印仁植高英姬
Owner 国立韩国交通大学校产学协力团
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