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A flexible substrate silver nanowire transparent conductive film and preparation method thereof

A technology of transparent conductive films and silver nanowires, which is applied in the direction of equipment for manufacturing conductive/semiconductive layers, cable/conductor manufacturing, conductive layers on insulating carriers, etc., can solve the problem of transparent conductive flexible silver nanowires and win robustness Poor performance, increasing the driving voltage of the electrochromic device, weak physical and chemical interactions, etc., to achieve the effect of reducing the driving voltage of the electrochromic device, easy operation, poor robustness and strong performance

Active Publication Date: 2020-11-10
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the preparation method of flexible silver nanowire film is mainly to directly spray silver nanowire dispersion on the surface of PDMS, and the silver nanowire / PDMS transparent conductive film has poor conductivity, which will increase the driving voltage of the electrochromic device.
The reason is that firstly, the adhesion between the silver nanowires on the transparent conductive film is weak, and secondly, due to the methyl termination of PDMS, the physical and chemical interactions with the silver nanowires are very weak, resulting in Flexible silver nanowire transparent conduction wins extremely robust performance

Method used

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  • A flexible substrate silver nanowire transparent conductive film and preparation method thereof
  • A flexible substrate silver nanowire transparent conductive film and preparation method thereof
  • A flexible substrate silver nanowire transparent conductive film and preparation method thereof

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preparation example Construction

[0030] see figure 1 , a method for preparing a transparent conductive film of silver nanowires on a flexible substrate according to an embodiment of the present invention is a method for preparing a transparent conductive film of silver nanowires on a flexible substrate with robust performance, comprising the following steps:

[0031] (1) Preparation of silver nanowire transparent conductive film:

[0032] Spray silver nanowire ethanol dispersion on a clean and flat rigid substrate to obtain a silver nanowire transparent conductive film; place it on a heating plate at 80°C for 10-15 minutes and dry it for 10-15 minutes; perform curing treatment in an oven at a curing temperature of 180°C- 220°C, the time is 15min to 20min.

[0033] Specifically, the rigid substrate for cleaning is silicon wafer, PET or cover glass after hydrophobic treatment.

[0034] Preferably, the aspect ratio of the silver nanowires is 800-1000, and the diameter of the silver nanowires is preferably less...

Embodiment 1

[0049] A method for preparing a flexible substrate silver nanowire transparent conductive film according to an embodiment of the present invention comprises the following steps:

[0050] (1) Preparation of silver nanowire transparent conductive film:

[0051] Add the silver nanowire ethanol dispersion into the airbrush, the diameter of the airbrush is 0.3mm, spray evenly at a spraying speed of 1cm / s, deposit a layer of silver nanowire network substrate with a certain arrangement density, and then coat the silver nanowire The silicon substrate of the wire transparent conductive film is placed on a heating plate at 80°C for 10 minutes, and then cured at 180°C in an oven for 15 minutes to obtain a transparent conductive film of silver nanowires. The transmittance at the wavelength is 91.7%, and the square resistance measured by four probes is 12.93Ω·sq -1 .

[0052] (2) Preparation of photocurable adhesive / silver nanowire composite transparent conductive film:

[0053] Add pho...

Embodiment 2

[0058] A method for preparing a flexible substrate silver nanowire transparent conductive film according to an embodiment of the present invention comprises the following steps:

[0059] (1) Preparation of silver nanowire transparent conductive film:

[0060] Add the silver nanowire ethanol dispersion into the airbrush, the diameter of the airbrush is 0.3mm, spray evenly at a spraying speed of 1cm / s, deposit two layers of silver nanowire network substrates with a certain arrangement density, and then coat the silver nanowire The silicon substrate of the wire transparent conductive film is placed on a heating plate at 80°C for 10 minutes, and then cured at 200°C in an oven for 15 minutes to obtain a silver nanowire transparent conductive film. The transmittance at the wavelength is 87.3%, and the square resistance measured by four probes is 8.27Ω sq. -1 , due to the increase in the number of depositions of silver nanowires, the network of silver nanowires increases, so the tra...

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Abstract

The invention discloses a flexible substrate silver nanowire transparent conductive film and a preparation method thereof. The preparation method comprises the steps: spraying the alcohol dispersion of silver nanowires on a rigid substrate, drying and then curing within the temperature range of 180-220 DEG C for 15-20min so as to obtain a silver nanowire transparent conductive film, and spin-coating colorless transparent light curing adhesive and irradiating and curing under UV light so as to obtain a light curing adhesive-silver nanowire composite transparent conductive film and spin-coating uniformly mixed bubble-free PDMS; then heat and curing the PDMS within the temperature range of 60-100 DEG C for 1h-6h; obtaining a PDMS-light curing adhesive-silver nanowire composite transparent conductive film on the rigid substrate; and stripping the film from the rigid substrate so as to obtain the flexible substrate silver nanowire transparent conductive film. According to the preparation method, the strong connection between the silver nanowires and the flexible substrate can be realized, the robustness of the silver nanowire transparent conductive film can be enhanced and the junction resistance between the silver nanowires can be reduced.

Description

technical field [0001] The invention belongs to the technical field of electrochromic devices and transparent conductive films, and in particular relates to a flexible substrate silver nanowire transparent conductive film and a preparation method thereof. Background technique [0002] With the development of the flexibility of optoelectronic devices, flexible, wearable, and portable flexible devices have attracted more and more attention from domestic and foreign researchers. Among them, electrochromic devices have a wide range of applications due to their energy-saving and green characteristics, but traditional electrochromic devices are mostly rigid devices, and their application range is also subject to many restrictions, because the flexibility of electrochromic devices is their development trend. Therefore, the flexibility as a transparent conductive layer has also become a research challenge. [0003] Transparent conductive layers are an integral part of electrochromi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1514H01B13/00H01B5/14
CPCG02F1/1514H01B5/14H01B13/0026
Inventor 李博马金戈孙亚陈花玲
Owner XI AN JIAOTONG UNIV
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