Unlock instant, AI-driven research and patent intelligence for your innovation.

An ultraviolet light sensor based on metal nanowires/zinc oxide nanomaterials

A technology of metal nanowires and zinc oxide nanometers, applied in nanotechnology for sensing, nanotechnology for materials and surface science, nanotechnology, etc. Requirements for flexibility and transparency such as stretching, poor substrate adhesion, poor film continuity, etc., to achieve the effects of easy large-scale preparation, low cost, and good sensitivity

Active Publication Date: 2019-02-19
NANJING UNIV OF POSTS & TELECOMM
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Zinc oxide active materials traditionally used in ultraviolet light sensors are generally particles, nanowires, and nanorod films grown on rigid substrates such as silicon wafers and ITO, which have poor adhesion to the substrate, poor continuity of the film, thin thickness inequality problem
In addition, rigid substrate devices are also difficult to meet the needs of future wearable electronic devices for flexibility and transparency such as bending resistance and stretching

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • An ultraviolet light sensor based on metal nanowires/zinc oxide nanomaterials
  • An ultraviolet light sensor based on metal nanowires/zinc oxide nanomaterials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] See attached figure 1 , the preparation process of the planar UV sensor is as follows:

[0026] (1) Substrate treatment: The PET substrate is treated with plasma to remove surface impurities and increase hydrophilicity.

[0027] (2) Deposition of the metal nanowire layer: Spray the ethanol dispersion of the metal nanowire on the PET substrate to deposit the metal nanowire film; anneal the film in an evacuated drying oven at 100°C, and the square resistance of the film is required to be less than 25Ω. sq–1, the transmittance is greater than 80%.

[0028] (3) Preparation of zinc oxide nanowire layer:

[0029] 1) Weigh zinc acetate dihydrate, methanol, and polyvinyl alcohol and dissolve them in an ethanol solution at a molar ratio of 1:1:1 to prepare a zinc acetate solution with a concentration of 0.008M.

[0030] 2) Take a certain amount of the above-mentioned zinc acetate solution and drop-coat it on the metal nanowire / PET substrate covered by the mask plate, put it i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
transmittivityaaaaaaaaaa
transmittivityaaaaaaaaaa
Login to View More

Abstract

The invention discloses an ultraviolet light sensor based on metal nanowires / zinc oxide nanomaterials, which includes two structures of planar type and "sandwich" type. The planar ultraviolet light sensor includes a substrate, a metal nanowire layer, and a zinc oxide nanomaterial layer; the "sandwich" structure includes a top electrode layer. During preparation, a layer of metal nanowire conductive film is deposited by spraying on a flexible and transparent substrate as the base, and then a layer of zinc oxide is grown on the metal nanowire / substrate covered by the mask plate by the sol-gel method. A seed crystal is used, and a zinc oxide nanomaterial layer is grown on a metal nanowire as an active layer by a low-temperature hydrothermal method, and an electrode lead is drawn out to obtain a device. The light transmittance of the ultraviolet sensor proposed by the invention is greater than 50%, it has good sensitivity under the operating voltage of 0.5V, and it has the characteristics of simple process, low cost, easy large-scale preparation and the like.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation and application sensing, and relates to a method for preparing a flexible and transparent ultraviolet light sensor based on a metal nanowire / zinc oxide nanostructure. Background technique [0002] Ultraviolet light sensors have the characteristics of high sensitivity, high response speed, long life, and low power consumption. They are widely used in safety protection, automatic control, environmental monitoring, and biomedicine. As a wide bandgap semiconductor material, zinc oxide materials, especially zinc oxide nanomaterials, have a good photoelectric response to ultraviolet light, and are an ideal ultraviolet light sensor material. Zinc oxide active materials traditionally used in ultraviolet light sensors are generally particles, nanowires, and nanorod films grown on rigid substrates such as silicon wafers and ITO, which have poor adhesion to the substrate, poor continuity of the film, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01J1/42B82Y30/00B82Y15/00
CPCB82Y15/00B82Y30/00G01J1/429
Inventor 李谊孙志鹏韩笑吴雪卫周伟欣陈剑宇马延文
Owner NANJING UNIV OF POSTS & TELECOMM