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Method for manufacturing large-area grapheme transparent conducting film

A technology of transparent conductive film and graphene, which is applied in the direction of cable/conductor manufacturing, circuits, electrical components, etc., can solve the problems of difficult operation of transfer, introduction of impurities, and easy generation of defects in graphene film, etc., to achieve high light-transmitting and conductive properties Effect

Active Publication Date: 2014-07-02
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the graphene prepared by chemical vapor deposition usually requires subsequent steps of etching the metal substrate and transferring to a suitable transparent substrate. These steps are not only a waste of metal, but also difficult to transfer (Advanced Materials2013,25(32 ), 4521-4526.), the resulting graphene film is prone to defects and the introduction of impurities, which is not conducive to the preparation of large-area graphene films
Liquid-phase film-forming methods such as wire rod coating and spray coating can continuously prepare large-area and uniform thin-film materials, and are easy to operate and practical (Advanced Materials2012, 24(21), 2874-2878.), so far, No one has reported its application in chemical vapor deposition of graphene transparent conductive films

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of graphene transparent conductive film: Put the metal base copper foil into a tube furnace, raise the temperature to 1020°C in a hydrogen atmosphere (500sccm), pass in carbon source methane 10sccm for 10 minutes, and turn off the methane gas source. After cooling to room temperature, the sample was taken out to obtain chemical vapor deposition graphene. The copper foil with graphene (5cm 2 ) Put it into 1ml ethanol solution, take out the copper foil after 30 minutes of ultrasound, and put a 5cm sheet 2 For copper foil with graphene, the above operation was repeated 10 times to obtain a graphene dispersion with a certain concentration. Add 0.1g PEDOT:PSS solution (Clevios PH1000, in which the mass fraction of PEDOT:PSS is 1.3%) to the dispersion and continue to sonicate for 10 minutes to obtain a stable dispersion. The stable dispersion was coated with a wire rod (Φ0.2mm) on a transparent substrate to form a film with an effective area of ​​15cm×20cm, and...

Embodiment 2

[0036] (1) The graphene transparent conductive film was prepared according to the method (1) in Example 1, except that the ultrasonic copper foil process was repeated 20 times.

[0037] (2) According to the method in (2) of Example 1, the average resistance is 35Ω / □, and the light transmittance is 76% at a wavelength of 550nm.

Embodiment 3

[0039] (1) The graphene transparent conductive film was prepared according to the method in (1) of Example 1, except that the ultrasonic copper foil process was repeated 5 times.

[0040] (2) According to the method in (2) of Example 1, the average resistance is 278Ω / □, and the light transmittance is 92% at a wavelength of 550nm.

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Abstract

The invention discloses a method for manufacturing a large-area grapheme transparent conducting film, and belongs to the technical field of grapheme manufacturing and application. According to the method, a plurality of non-etching physical methods are adopted to conduct stripping on grapheme on a metal substrate, dispersion liquid is formed through ultrasound, conductive macromolecules with the high conductivity is added into the liquid for conducting stabilization processing, and the stable dispersion liquid is obtained. Wire rod coating or spraying or blade coating or other modes are carried out on the obtained dispersion liquid to form the films on a transparent substrate, and the grapheme transparent conducting films with the controllable thickness can be obtained. According to the method, recycling of the metal substrate in the chemical vapor deposition process can be achieved, the subsequent transfer step is not needed, the method is economical, simple and convenient to operate, the high-quality grapheme manufactured by the chemical vapor deposition method is combined with the continuous liquid phase film making technology, and a large number of high-quality grapheme transparent conducting films can be manufactured.

Description

Technical field [0001] The invention relates to graphene preparation and large-area film forming technology based on graphene materials, in particular to a method for preparing a large-area graphene transparent conductive film, and belongs to the field of material applications (photoelectric devices). Background technique [0002] Transparent conductive film is an important part of many commonly used optoelectronic devices. It is widely used in solar cells, touch screens, organic light-emitting diodes, liquid crystal displays and other devices, and has become a subject of widespread attention and research (Nano Letters2008, 8(1), 323 -327; Advanced Materials 2012, 24(21), 2874-2878; Acs Nano 2010, 4(1), 43-48.). However, the existing commercial transparent conductive material ITO has great limitations, such as high cost and high brittleness, and is not suitable for the current development trend of flexible optoelectronic devices. Therefore, research on transparent conductive fil...

Claims

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Application Information

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IPC IPC(8): H01B13/00
Inventor 智林杰宁静
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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