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Visible light detection system based on ZnO-graphene functional composite nanomaterials

A technology of composite nanomaterials and graphene, which is applied in the field of photodetector test systems, can solve the problems of limited wavelength range of ultraviolet detection light detection, restricted light response efficiency, high recombination rate, etc., so as to improve the light response behavior, improve the The effect of light response efficiency

Active Publication Date: 2018-07-31
SHANGHAI DIANJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Due to the high recombination rate of photogenerated electron-hole pairs and surface defects of pure zinc oxide nanomaterials, the efficiency of photoresponse is seriously affected and its application is restricted, and the wavelength range of ultraviolet detection photodetection is very limited.

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  • Visible light detection system based on ZnO-graphene functional composite nanomaterials

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Embodiment Construction

[0016] In order to make the present invention more comprehensible, preferred embodiments are described in detail as follows.

[0017] combine figure 1 , in a visible light detection system based on zinc oxide graphene functional composite nanomaterials provided by the present invention, the ZnO nanowires are first attached to the electrode 1 by chemical vapor deposition, and the specific steps are: take the ZnO nanowires and dissolve them in the Configured into a solution in ionized water, the concentration of ZnO nanowires is 5mol / 1, and then a certain amount of graphene quantum dot solution is dropped into the above solution, and the molar ratio of the graphene quantum dot solution to the above-mentioned prepared solution is 1:25 , it can be seen that the color of the solution is deepened, and it is further magnetically stirred for one hour to obtain a well-dispersed suspension solution. The prepared suspension solution was deposited on the metal electrode with a micro-adju...

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Abstract

The invention provides a visible light detection system based on a zinc-oxide graphene functional composite nanometer material. The visible light detection system is characterized by comprising a detector with an electrode; a ZnO nanowire solution is deposited on the electrode and is dried; and positive and negative electrodes of a high-precision semiconductor tester are connected with the electrode. During the testing process, the resistance change of the detector is recorded by setting a certain working voltage. A visible light source is arranged above the detector and the distance between the visible light source and the detector can be adjusted to obtain light intensities with different intensity values. With composition with the graphene material, the comprehensive performance generated by the synergistic effect of all components is realized while the property of the independent material is kept, so that the photoresponse behavior of the zinc-oxide-based device can be improved.

Description

technical field [0001] The invention relates to a test system of a photodetector. Background technique [0002] Due to the surface and interface effects, quantum size effects and macroscopic quantum tunneling effects, nano-zinc oxide exhibits excellent electrical, magnetic and optical properties. Compared with GaN, SiC and other wide bandgap materials, it has good chemical stability. With good thermal stability, high radiation resistance, low growth temperature and long service life, it is also widely used in ultraviolet detectors and detectors. At present, ultraviolet detectors have been prepared based on a single ZnO nanomaterial, most of which are ZnO thin films deposited on a substrate through a certain process and then made into photodetectors limited to a limited ultraviolet range. [0003] Due to the high recombination rate of photogenerated electron-hole pairs and surface defects of pure zinc oxide nanomaterials, the efficiency of photoresponse is seriously affected...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J1/42G01J1/02G01J1/04H01L31/09
CPCG01J1/0295G01J1/04G01J1/42H01L31/09
Inventor 叶小亮
Owner SHANGHAI DIANJI UNIV