Method for manufacturing flexible transparent conductive film based on low-voltage driving liquid film embedded electrospray 3D printing

A transparent conductive film, 3D printing technology, applied in cable/conductor manufacturing, equipment for manufacturing conductive/semiconductive layers, final product manufacturing, etc. High stability, long manufacturing cycle and other problems, to achieve the effect of improving stability and deposition accuracy, which is conducive to high stability and increased aspect ratio

Active Publication Date: 2021-03-16
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional metal grid flexible transparent conductive film is to manufacture micro-nano-scale metal grids on the surface of flexible transparent substrates to form metal grids (relief metal grids) floating on the surface of flexible transparent substrates. However, this relief metal There are many deficiencies in the use of grid flexible transparent conductive films: (1) The high surface roughness of the relief metal grid is easy to cause short circuits in devices such as OLEDs and organic photovoltaics, and affects the subsequent growth of other functional material layers on its surface, which limits its performance. Applications in many optoelectronic devices; (2) Due to the weak adhesion of the relief metal grid with a flexible substrate, the metal grid is easy to peel off and fall off from the substrate, resulting in device failure, which limits its use in highly flexible electronic devices (Flexible electronics and wearable devices that require frequent bending); (3) At this stage, the manufacturing cost of high-performance metal grids is generally high, the production efficiency is low, and most of them require a vacuum environment and expensive vapor deposition equipment, etc.; (4) It is difficult to take into account manufacturing efficiency, high adhesion, cost and other issues of ultra-large aspect ratio metal mesh
To a certain extent, these composite manufacturing processes have produced flexible transparent conductive films with embedded metal grids with excellent perfor

Method used

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  • Method for manufacturing flexible transparent conductive film based on low-voltage driving liquid film embedded electrospray 3D printing
  • Method for manufacturing flexible transparent conductive film based on low-voltage driving liquid film embedded electrospray 3D printing
  • Method for manufacturing flexible transparent conductive film based on low-voltage driving liquid film embedded electrospray 3D printing

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0042] Example 1

[0043] Step 1: Prepare the printing substrate

[0044] (1) Select high-quality float glass as the hard substrate, firstly carry out the pretreatment of the float glass, place the float glass in isopropanol solution for ultrasonic cleaning for 5 minutes, then place it in deionized water for ultrasonic cleaning for 5 minutes, and finally use Blow dry with nitrogen gas and take it out for later use.

[0045] (2) Sylgard 184 from Dow Corning was selected as the liquid polymer. The PDMS elastomer and its corresponding curing agent were stirred and mixed evenly at a mass ratio of 10:1, and placed in a vacuum drying oven to evacuate to remove air bubbles.

[0046] (3) Pour the vacuum-treated PDMS liquid on the surface of the float glass, let it stand for 1 minute, and then place it on a homogenizer for spin coating. The spin coating time is 1 min, and the speed is 1000r / min to form a layer of PDMS liquid about 30 μm thick. The film and the printing substrate are ...

Example Embodiment

[0054] Example 2

[0055] This embodiment is a semi-embedded flexible metal grid transparent conductive film. Suitable for applications such as flexible solar cells, OLEDs, etc.

[0056] Step 1: Prepare the printing substrate

[0057] (1) Choose ordinary glass as the hard substrate, firstly carry out the pretreatment of ordinary glass, place the ordinary glass in isopropanol solution for ultrasonic cleaning for 5 minutes, then place it in deionized water for ultrasonic cleaning for 5 minutes, and finally dry it with nitrogen, Take out and set aside.

[0058] (2) Sylgard 184 from Dow Corning was selected as the liquid polymer. The PDMS elastomer and its corresponding curing agent were stirred and mixed evenly at a mass ratio of 10:1, and centrifuged to remove air bubbles.

[0059] (3) Pour the vacuum-treated PDMS liquid on the glass surface, let it stand for 2 minutes, and then place it on a coater for spin coating. The spin coating time is 1 min, and the rotation speed is 5...

Example Embodiment

[0068] Example 3

[0069] This embodiment is a multilayer flexible transparent circuit, such as Figure 5 shown

[0070] Step 1: Prepare the printing substrate

[0071](1) Silicon wafers were selected as the hard substrate. Firstly, the substrate was pretreated. The silicon wafers were ultrasonically cleaned in isopropanol solution for 5 minutes, then ultrasonically cleaned in deionized water for 5 minutes, and finally dried with nitrogen.

[0072] (2) Sylgard 184 from Dow Corning was selected as the liquid polymer. The PDMS elastomer and its corresponding curing agent were stirred and mixed evenly at a mass ratio of 10:1, and placed in a vacuum drying oven for vacuum treatment to remove air bubbles.

[0073] (3) Pour the vacuum-treated PDMS liquid on the glass surface, let it stand for 2 minutes, and then place it on a coater for spin coating. The spin coating time is 2 minutes, and the rotation speed is 200r / min, forming a PDMS liquid film with a thickness of about 150 μm....

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Abstract

The invention belongs to the field of flexible transparent conductive films, and relates to a method for manufacturing a flexible transparent conductive film based on low-voltage driving liquid film embedded electrospray 3D printing, which comprises the following steps: directly printing conductive slurry on a liquid or semi-cured liquid polymer substrate, and directly manufacture the completely embedded or semi-embedded flexible transparent conductive film with ultrahigh resolution by using the limited wrapping effect of a liquid film on a conductive circuit. The method has the advantages that the process steps are simple, the production steps are non-toxic and harmless, the manufacturing cost is low, and the manufactured transparent conductive thin film is excellent in photoelectric property, and a new solution is provided for large-scale and low-cost manufacturing of the high-performance embedded flexible transparent conductive thin film.

Description

technical field [0001] The invention belongs to the field of flexible transparent conductive films, and in particular relates to a high-efficiency and low-cost manufacturing method for flexible transparent conductive films based on low-voltage driving liquid film embedded electrospray 3D printing. Background technique [0002] Transparent conductive film is a film that can conduct electricity and has high light transmittance in the visible light range. It has excellent optical transparency, conductivity, flexibility and stability. It is used in touch screens, flexible transparent displays , OLEDs, wearable devices, flexible thin-film solar cells, transparent electromagnetic interference shielding windows, smart windows, electronic paper, and transparent electric heating and many other fields have a very wide range of applications. At present, the most widely used transparent conductive material is indium tin oxide (ITO) material, which has extremely balanced optical transmit...

Claims

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Application Information

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IPC IPC(8): H01B13/00
CPCH01B13/0026Y02P70/50
Inventor 朱晓阳李政豪兰红波李红珂孙銮法彭子龙
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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