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Graphene layer, film material, preparation method thereof, and flexible display device

A graphene film, flexible display technology, applied in the direction of instruments, identification devices, etc., can solve the problems of poor adhesion performance of PI base film, restrict the application of graphene, and fall off of graphene, and achieve the goal of not easy to fall off, improve adhesion performance, Good adhesion performance

Active Publication Date: 2019-04-09
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the adhesion of the PI base film is poor. During the patterning process of photolithography, graphene is very easy to fall off from the PI base film, which seriously restricts the application of graphene in display devices.

Method used

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  • Graphene layer, film material, preparation method thereof, and flexible display device
  • Graphene layer, film material, preparation method thereof, and flexible display device
  • Graphene layer, film material, preparation method thereof, and flexible display device

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preparation example Construction

[0037] The preparation method of the graphene film is preferably:

[0038] The graphene is reacted with alcohols and chloroauric acid, and then electrodeposited to obtain a graphene film with hydroxyl groups.

[0039] In the preparation method of graphene, firstly, graphene, alcohols and chloroauric acid are reacted to obtain graphene with carboxyl group; the graphene with carboxyl group is electrodeposited to obtain a graphene film with hydroxyl group. For the conditions of the reaction, the existing graphene modified and doped conditions can be used.

[0040] Through the above method, doping to form graphene with active functional groups reduces the square resistance of graphene on the one hand; on the other hand, active functional groups are formed by doping to facilitate the reaction with the organic insulating film and improve adhesion.

[0041] The organic insulating film is polyethylene, polyvinylidene fluoride, polytetrafluoroethylene or acrylic resin. The organic insulating ...

Embodiment 1

[0066] (A) With reference to the vapor deposition method described in the literature Yu QK, Jauregui LA, Wu W, et al. Control and characterization of individual grains and grain boundaries in graphene grown by chemical vapour deposition. Nat Mater, 2011, 10: 443–449, graphite The ene is deposited on the Cu film or the Ni film.

[0067] The graphene, butanol and chloroauric acid are reacted for more than 30 minutes at room temperature under a phosphate buffer system of pH=9. Under stirring conditions, the composite material is prepared by one-step electrodeposition by cyclic voltammetry, and the composite material is obtained. Graphene film.

[0068] (B) The molten acrylic resin is spin-coated on the graphene film with hydroxyl groups by the coating equipment of the photoetching machine, the pre-rotation speed (to make the resin spread evenly) 300rpm / 10sec, the main speed of 600 / 15sec (to make the resin Thinned to the required thickness), cured at 200 ℃ for 45 minutes.

[0069] (C) ...

Embodiment 2

[0075] (A) With reference to the vapor deposition method described in the literature Yu QK, Jauregui LA, Wu W, et al. Control and characterization of individual grains and grain boundaries in graphene grown by chemical vapour deposition. Nat Mater, 2011, 10: 443–449, graphite The ene is deposited on the Cu film.

[0076] Graphene, butanol and chloroauric acid are reacted for more than 30 minutes at room temperature under a phosphate buffer system with pH=9. Under stirring conditions, the composite material is prepared by one-step electrodeposition by cyclic voltammetry to obtain a composite material with carboxyl groups. Graphene.

[0077] (B) The molten polyethylene is spin-coated on the graphene film with hydroxyl groups through the coating equipment of the photoetching machine, and the coating is converted to Spin coatnig: pre-rotation speed (to spread the resin uniformly) 500rpm / 10sec, main speed 1200rpm / 30sec (to thin the resin to the required thickness), curing at 230°C for ...

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Abstract

The invention relates to the field of electronic materials and discloses a graphene layer. The graphene layer comprises a graphene membrane and an organic insulating membrane adhering to the surface of one side of the graphene membrane, wherein a hydrogen bond can be formed between the graphene membrane and the organic insulating membrane, and the organic insulating membrane is polyethylene, polyvinylidene difluoride, polytetrafluoroethylene or acrylic resin. The invention further discloses a membrane material composed of the graphene layer and a polyimide substrate and a method for preparing the membrane material. On one hand, the hydrogen bond can be formed by the organic insulating membrane and the graphene membrane in the follow-up photolithography technique, and connection is tight; on the other hand, the organic insulating membrane can also be tightly connected with polyimide, so that adhesion between graphene and polyimide is effectively strengthened by means of the organic insulating membrane. The membrane material composed of the graphene membrane, the organic insulating membrane and the polyimide substrate is high in adhesion performance, and the graphene membrane does not fall off easily. The membrane material can be applied to a display device.

Description

Technical field [0001] The invention relates to the field of electronic devices, in particular to a graphene layer, a film material, a preparation method thereof, and a flexible display device. Background technique [0002] In recent years, flexible displays have made rapid development. For flexible display devices, high-quality substrates are essential. Taking graphene as an example, graphene has a charge mobility 100 times higher than that of silicon, a current density 100 times higher than that of copper, and outstanding thermal conductivity and chemical resistance. It can not only realize a variety of chemical functional applications, but also Features such as flexibility and stretchability can be synthesized and printed in a simple way. Graphene can be used not only as a substitute for existing materials, but also as materials for next-generation transistors and electrode components, so it has attracted widespread attention. [0003] Polyimide (PI) has excellent mechanical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09F9/00G09F9/30
CPCG09F9/00G09F9/301
Inventor 吕志军张方振孙双
Owner BOE TECH GRP CO LTD