Metal graphene of composite structure and preparing method thereof

A metal-graphite, composite structure technology for final product manufacturing, sustainable manufacturing/processing, nanotechnology for materials and surface science, etc., which can solve problems such as limiting the optical response of photodetectors and external quantum conversion efficiency, etc. To achieve the effect of improving interaction efficiency, enhancing light absorption rate, and enhancing surface electric field

Inactive Publication Date: 2014-06-25
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the nature of electron transitions between graphene bands limits its absorption rate in the visible light band to only 2.3%, which limits the optical response and external quantum conversion efficiency of photodetectors.

Method used

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  • Metal graphene of composite structure and preparing method thereof
  • Metal graphene of composite structure and preparing method thereof

Examples

Experimental program
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Embodiment

[0023] (1) Preparation of nanoporous gold:

[0024] The gold-silver alloy film with a thickness of 100nm was wet-etched with concentrated nitric acid for 10 hours, and the alloy film was cleaned with deionized water for 20 times, and then the metal film in the deionized water was removed with a silicon wafer. The nanoporous gold with double-connected phase-separated structure is a three-dimensional phase-separated structure composed of gold and air;

[0025] (2) Transfer of graphene to nanoporous gold:

[0026] Transfer graphene, that is, prepare graphene on copper substrate by chemical vapor deposition method, and coat PMMA (polymethyl methacrylate) film on graphene by spin coating method, add copper sulfate, concentrated sulfuric acid, and water to 5g : 25mL: 25mL ratio, etch the copper substrate covered with graphene, when the copper is completely dissolved by the solution, use nanoporous gold to remove the graphene-PMMA film from the etching solution, wash it with deioniz...

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Abstract

The invention discloses metal graphene of a composite structure and a preparing method thereof. The metal graphene is composed of nano-porous gold of double-connection split-phase structure and a graphene film. The graphene film covers the nano-porous gold. The nano-porous gold structure can greatly enhance a surface electric field, so that interaction efficiency of the electric field and the graphene is improved, the composite structure can effectively improve light absorptivity of the graphene in a visible waveband, and therefore the metal graphene is widely applied to the field of photoelectric detectors based on graphene.

Description

technical field [0001] The invention relates to the technical field of photodetection devices, in particular, it is a metal graphene with composite structure, which can enhance the absorption rate of graphene in the visible light band. Background technique [0002] A photodetector is a device that converts optical signals into electrical signals, and it is widely used in various fields of military and national economy. Conventional photodetector materials based on III-V semiconductor materials have been rapidly developed. However, the traditional photodetector is limited by the carrier mobility and the material gap, and has the disadvantages of slow photoelectric conversion rate, low conversion efficiency and narrow response spectrum, which limits the application of traditional photodetectors. scope. Therefore, finding a semiconductor material for the manufacture of new photodetectors has become a key link to solve the above problems. [0003] Graphene is a two-dimensiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/028H01L31/18B82Y30/00
CPCB82Y30/00H01L31/028H01L31/1804Y02P70/50
Inventor 刘锋郝英华赵晓静宋聪欣陈陆懿石旺舟
Owner SHANGHAI NORMAL UNIVERSITY
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