Flexible transparent conductive film with hierarchical structure and preparation method thereof

A technology of transparent conductive film and hierarchical structure, which is applied in the direction of conductive layer on insulating carrier, cable/conductor manufacturing, circuit, etc., can solve the problems of poor chemical stability, high preparation cost, brittle and fragile, etc. It is easy to achieve parameter conditions Control, reduce ohmic loss, and ensure the effect of light transmission

Active Publication Date: 2019-06-25
厦门纵横集团科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the low content of indium in the crust of ITO, the quality is brittle and fragile, the preparation cost is high, the infrared transmittance is low, and the chemical stability is poor, which limits the application of ITO in the field of transparent conductive electrodes.
[0003] The inventors found that there are many alternative materials for transparent conductive electrodes, such as graphene, conductive polymers, carbon nanotubes, metal nanowires, etc., but most of the materials are not suitable for large-area preparation processes, stability and conductivity. Poor sex

Method used

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  • Flexible transparent conductive film with hierarchical structure and preparation method thereof
  • Flexible transparent conductive film with hierarchical structure and preparation method thereof
  • Flexible transparent conductive film with hierarchical structure and preparation method thereof

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preparation example Construction

[0031] A method for preparing a flexible transparent conductive film with a hierarchical structure provided by an embodiment of the present invention includes the following steps:

[0032] S1, using electrospinning to obtain a three-dimensional network polymer template.

[0033] Further, in a preferred embodiment of the present invention, the spinning solution for electrospinning is a PVA colloid solution with a mass concentration of 5-20%.

[0034] In a preferred embodiment, the process of electrospinning is as follows: the aluminum groove is used as a collector, a positive voltage of 12-18 kV is applied to the emitter, and a negative voltage of 1-3 kV is applied to the collector. ~20% PVA colloidal solution is the spinning solution, and the polymer template with three-dimensional network structure is obtained by spinning.

[0035] Preferably, the preparation process of the aluminum groove is as follows: folding the thickened aluminum foil into a groove with a width of 2-10 ...

Embodiment 1

[0059] A flexible transparent conductive film with a hierarchical structure provided in this embodiment is prepared according to the following steps, as figure 2 Shown is a schematic diagram of the preparation process of the flexible transparent conductive film:

[0060] (1) The PET film with a thickness of 50 μm was washed with deionized water and absolute ethanol for 30 min, and dried as a flexible and clear substrate for future use.

[0061] (2) Three-dimensional PVA nanofiber network was prepared under the conditions of positive voltage 15kV and negative voltage 2kV by electrospinning method, and the spinning solution was PVA colloidal solution with a mass concentration of 10%.

[0062] (3) The PVA nanofiber network is placed in a magnetron sputtering apparatus to sputter metallic silver with a vacuum of 1×10 -5 Pa, the flow rate of high-purity argon is 50cm 3 / min, the distance between the target and the substrate is 6cm, the deposition beam is incident perpendicular t...

Embodiment 2

[0069] This implementation is basically the same as that of Example 1, except that in step (3), the sputtered metal is copper.

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Abstract

The invention provides a flexible transparent conductive film with a hierarchical structure and a preparation method thereof, and relates to the technical field of conductive films. The preparation method comprises the following steps of: obtaining a three-dimensional reticular polymer template by electrospinning; sputtering metal on the polymer template by magnetron sputtering to obtain a metal nano silk screen; transferring the metal nano silk screen to the surface of the flexible transparent substrate, and then placing the flexible transparent substrate in a solvent to remove the polymer template from the m metal nano silk screen to obtain a metal nano film; printing a silver grid circuit layer on the surface of the metal nano film by inkjet printing to obtain the flexible transparent conductive film. The prepared flexible transparent conductive film having a hierarchical conductive network structure has lower electrical resistance and higher stability. The nano silk screen obtainedby electrospinning and magnetron sputtering can make up for the silver grid gap obtained by inkjet printing, thereby enhancing the conductivity of the silver grid gap. Enhancing the conductivity through the composite structure does not significantly affect the light transmission. The method is low in cost, easy to operate, and suitable for large-area roll-to-roll industrial production.

Description

technical field [0001] The invention relates to the technical field of transparent conductive electrodes, and in particular to a flexible transparent conductive film with a hierarchical structure and a preparation method thereof. Background technique [0002] Transparent conductive electrodes (TCEs) with excellent mechanical flexibility will be important components of next-generation wearable optoelectronic devices, such as light-emitting devices, photovoltaic cells, switching devices, and touch-screen panels. Currently, indium tin oxide (ITO) has been the most widely used TCE material in academia and industry due to its optical transparency, thermal / chemical stability, device compatibility, and well-established fabrication process. However, due to the low content of indium in the crust of ITO, the quality is brittle and fragile, the preparation cost is high, the infrared transmittance is low, and the chemical stability is poor, which limits the application of ITO in the fie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B5/14
Inventor 叶渊地
Owner 厦门纵横集团科技股份有限公司
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