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Emitting cathode based on composite material of graphene/zinc oxide nanowire and preparation of same

A zinc oxide nanowire and composite material technology is applied in the field of cold cathodes of vacuum electronic devices, which can solve the problems of high manufacturing cost, high threshold electric field of opening electric field, complicated process, etc., and achieve high emission current density, low opening electric field, low electric field, etc. Simple preparation method

Active Publication Date: 2011-08-17
FUZHOU UNIV
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Problems solved by technology

Currently commonly used field emission cold cathode materials such as carbon nanotubes, diamond films, silicon, and metallic molybdenum have disadvantages such as high production costs and complicated processes, and their open electric field threshold electric field is relatively high, so it is necessary to seek other alternatives. Field Emission Cold Cathode Materials

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  • Emitting cathode based on composite material of graphene/zinc oxide nanowire and preparation of same
  • Emitting cathode based on composite material of graphene/zinc oxide nanowire and preparation of same
  • Emitting cathode based on composite material of graphene/zinc oxide nanowire and preparation of same

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Embodiment Construction

[0021] A field electron emission cathode based on graphene / zinc oxide nanowire composite material of the present invention will be described in detail below in conjunction with the accompanying drawings and examples. The present invention provides preferred embodiments, but should not be construed as limited to the embodiments set forth herein.

[0022] Where the referenced figures are schematic illustrations of idealized embodiments of the invention, the illustrated embodiments of the invention should not be construed as limited to the specific shapes of the regions shown in the figures. All are represented by rectangles in this embodiment, and the representation in the figure is schematic, but this should not be considered as limiting the scope of the present invention.

[0023] See Figure 4 , an emission cathode based on a graphene / zinc oxide nanowire composite material, comprising a substrate formed with a conductive electrode, and a graphene film layer positioned on the...

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Abstract

The invention relates to a field electron emitting cathode based on the composite material of graphene / zinc oxide nanowire, comprising a conductive electrode and the composite material of graphene / zinc oxide nanowire, wherein the composite material of graphene / zinc oxide nanowire is positioned on the surface of the electrode, and consists of the graphene with the size ranging from 2 to 10 micronsand the zinc oxide nanowire with the length ranging from 1 to 2 microns and the diameter being 100 nanometers; and the turn-on field is lower than or equal to 1.7 volt / microns, and the threshold field is lower than or equal to 4 volt / microns. The filed emission electron source has the advantages of lower turn-on field, low threshold field, high emission current density, stable emission, easy preparation method and easy realization of industrialized volume production.

Description

technical field [0001] The invention belongs to the technical field of electronic materials, and specifically relates to a field electron emission cathode based on a graphene / zinc oxide nanowire composite material, which is suitable for making a field emission cathode in a field emission flat panel display (FED), and for vacuum Cold cathodes for electronic devices. Background technique [0002] Field emission display device is a new type of flat panel display technology. Field emission display technology is an extension of cathode ray tube (CRT) technology. It has the advantages of wide viewing angle, bright colors and fast response speed of CRT display. In the current Among all kinds of flat panel displays, only FED can achieve the image display quality of traditional CRT, and at the same time, it has the advantages of thinness and lightness such as liquid crystal display (LCD). The core component of the FED display is the field emission cold cathode array, in which the ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J1/304H01J9/02
Inventor 郭太良李福山吴朝兴叶芸张永爱
Owner FUZHOU UNIV
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