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Graphene-laminated composite doping method

A composite doping and graphene technology, applied in the coating and other directions, can solve the problems of weak interaction between small molecule dopants and graphene, easy migration and volatilization, and increased square resistance of graphene, so as to achieve uniform doping effect. stable effect

Inactive Publication Date: 2016-04-20
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the physically adsorbed small molecule dopants have weak interaction with graphene, are easy to migrate and volatilize, and the square resistance of graphene continues to increase during the placement process, which severely limits the practical application of graphene.

Method used

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  • Graphene-laminated composite doping method
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  • Graphene-laminated composite doping method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The steps of this embodiment are as follows:

[0024] Step 1, take by weighing 1.5g of ferric p-toluenesulfonate and dissolve in 350g of absolute ethanol, 600g of ethylene glycol and 450g of ethyl lactate to form a mixed solution, mix it into an oxidizing agent coating liquid after stirring;

[0025] Step 2: Apply the doped coating solution on the target substrate PET001 by roller coating method, and obtain an oxidant coating 002 with a film thickness of about 30 nm after drying;

[0026] Step 3, placing the PET substrate 001 coated with the oxidizing agent coating 002 in an airtight container and heating to 60°C;

[0027] Step 4: heating and vaporizing the 3,4-ethylenedioxythiophene small molecule monomer, and passing argon as a carrier gas into a closed container. The volume percentage of argon gas is 99%, the flow rate is 100 sccm, and the first doped coating 003 is formed on the surface of the target substrate PET001 after ventilation for 40 minutes;

[0028] Step...

Embodiment 2

[0032] The steps of this embodiment are as follows:

[0033] Step 1, taking 1g of ferric p-toluenesulfonate and dissolving it in a mixed solvent composed of 60g of isopropanol, 75g of n-butanol and 10g of ethylene glycol monobutyl ether, mixing evenly to form an oxidizing agent coating liquid;

[0034] Step 2, coating the doped coating solution on the optical grade PET substrate 001, and drying to obtain an oxidant coating 002 with a film thickness of about 10 nm;

[0035] Step 3, placing the PET substrate 001 coated with the oxidizing agent coating 002 in an airtight container, and heating to 90°C;

[0036] Step 4: Heat and vaporize the pyrrole small molecule monomer, and pass nitrogen gas as a carrier gas into an airtight container. The volume percentage of nitrogen gas is 95%, the flow rate is 50 sccm, and the first doped coating 003 is formed on the surface of the target substrate PET after ventilation for 30 minutes;

[0037] Step 5, soak the first doped coating 003 in ...

Embodiment 3

[0042] The steps of this embodiment are as follows:

[0043] Step 1, weigh 0.3g ferric p-toluenesulfonate and dissolve in a mixed solvent composed of 50g methanol, 60g isopropanol, 170g n-butanol, 8g ethylene glycol monomethyl ether and 5g ethylene glycol monobutyl ether, mix well Formulated as an oxidant coating solution;

[0044] Step 2: Coating the doped coating solution on the optical grade PET substrate 001, and drying to obtain an oxidant coating 002 with a film thickness of about 5 nm;

[0045] Step 3, placing the PET substrate 001 coated with the oxidizing agent coating 002 in an airtight container, and heating to 50°C;

[0046] Step 4: heating and vaporizing the thiophene small molecule monomer, and passing argon as a carrier gas into a closed container. The volume percentage of argon gas is 90%, the flow rate is 30 sccm, and the first doped coating 003 is formed on the surface of the target substrate PET001 after ventilation for 60 minutes;

[0047] Step 5, soak t...

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Abstract

The invention provides a graphene-laminated composite doping method, which comprises the following steps: (1) preparing an oxidant coating liquid; (2) coating the surface of a target substrate with an oxidant solution, and heating and drying to form an oxidant coating; (3) putting the target substrate coated with the oxidant into an airtight container, and heating to a certain temperature; (4) heating and gasifying a conductive polymer precursor, mixing with a carrier gas to introduce into the airtight container, and adsorbing a small molecular precursor to an oxidative coating to form a doping coating through polymerization; (5) soaking the doping coating with deionized water and drying the doping coating; and (6) transferring graphene into the target substrate with the doping coating, and furthermore, repeating the steps (2) to (5) on the graphene to form a second doping coating. A layer of doping coating with uniform and controllable thickness is formed on the surface of the target substrate in situ; the doping effect is uniform; in addition, the doping coating is stable, and is located between the graphene and the target substrate after being transferred; and the doping effect is stable and lasting.

Description

technical field [0001] The invention belongs to the technical field of graphene production, and in particular relates to a graphene laminated composite doping method. Background technique [0002] Graphene is a new type of two-dimensional carbon nanomaterial discovered in the past ten years, which has excellent mechanical, thermal, optical, electrical and other properties. Among them, the extremely high transmittance and ultra-high carrier mobility make it a new transparent conductive material that has attracted the attention of the industry. [0003] At present, for two-dimensional continuous graphene film products, electrical properties are the core key properties. The existing relatively mature graphene film prepared by chemical vapor deposition (CVD) has a high square resistance and cannot be used directly. It must be doped to reduce the square resistance. Most of the current mainstream doping methods use small molecules as dopants, such as ethylenediamine, nitric acid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08J7/06C08G61/12C08G73/06C08L67/02
CPCC08G61/126C08G73/0611C08J7/0423C08J7/06C08J2367/02C08J2465/00C08J2479/04
Inventor 姜浩马金鑫黄德萍弋天宝徐鑫高翾李占成史浩飞
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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