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Uniform-performance silver nanowire transparent conductive thin-film preparation method by means of dynamic infrared heating

A transparent conductive film, silver nanowire technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, can solve the problems of poor film uniformity, film non-uniformity, etc., to increase adhesion force, achieve uniform control, and reduce the effect of junction resistance

Inactive Publication Date: 2015-12-09
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the spraying process, the uniformity of the film produced by the spraying process is relatively poor due to the uneven distribution of the dispersion liquid sprayed from the nozzle on the substrate; while the spin coating process uses the centrifugal force generated by the rotation to disperse the nanowires and form a film, which results in The orientation of silver nanowires has a certain directionality and the dispersion of silver nanowires has a certain selectivity, so the uniformity of the film is poor
Starting from the simplicity of the equipment, we chose the method of scraping coating to prepare silver nanowire transparent conductive film. This method is simple and easy, and more importantly, it can prepare large-area transparent conductive film, which is conducive to commercial large-scale production and preparation. ; but there are many influencing factors in the scraping process that can lead to the inhomogeneity of the film, such as the uniformity of heating and the dispersion of the silver nanowire dispersion and the thickness of the wet film, etc.
[0003] In the literature and patents, there is no report on the preparation of silver nanowire transparent conductive film with non-uniformity less than 10% by using dynamic infrared heating method

Method used

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  • Uniform-performance silver nanowire transparent conductive thin-film preparation method by means of dynamic infrared heating
  • Uniform-performance silver nanowire transparent conductive thin-film preparation method by means of dynamic infrared heating
  • Uniform-performance silver nanowire transparent conductive thin-film preparation method by means of dynamic infrared heating

Examples

Experimental program
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Effect test

Embodiment example 1

[0033] 1. Disperse silver nanowires in a solvent containing 75vol% ethanol, 12.5vol% water and 12.5vol% isopropanol. The solvent contains HPMC with a mass fraction of 0.05%, and the concentration of silver nanowires is 0.2mg / ml. Dispersion, mix it evenly;

[0034] 2. Use atmospheric pressure to fix the PET film on the glass plate and fix it with 3M tape. For the PET film with an area of ​​10cm*10cm, take 1ml of dispersion liquid on the PET surface each time, and use the siphon effect between the glass rod and the dispersion liquid to control the distance between the glass rods The height of the film is 0.06mm;

[0035] 3. Scrape the dispersion liquid dripped onto the surface of PET, scrape the dispersion liquid on the surface of the PET film in the order of first horizontal and then vertical, repeat twice, so that the dispersion liquid is evenly coated on the surface of the PET film, and scrape the liquid every time Finally, turn on the infrared heater, and then let the film ...

Embodiment example 2

[0038] 1. Disperse silver nanowires in a solvent containing 75vol% ethanol, 12.5vol% water and 12.5vol% isopropanol. The solvent contains HPMC with a mass fraction of 0.05%, and prepare a dispersion with a concentration of 0.1mg / ml. mix it well;

[0039] 2. Use atmospheric pressure to fix the PET film on the glass plate and fix it with 3M tape. For the PET film with an area of ​​10cm*10cm, take 1ml of dispersion liquid on the PET surface each time, and use the siphon effect between the glass rod and the dispersion liquid to control the distance between the glass rods The height of the film is 0.06mm;

[0040] 3. Scrape the dispersion liquid dripped onto the PET surface, scrape the dispersion liquid on the surface of the PET film in the order of first horizontal and then vertical, repeat 6 times, so that the dispersion liquid is evenly coated on the surface of the PET film, each time Finally, turn on the infrared heater, and then let the film pass under the heater at a speed o...

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Abstract

The invention provides a uniform-performance silver nanowire transparent conductive thin-film preparation method by means of dynamic infrared heating so that uniformity of the optical and electrical properties of the thin-film is ensured to be better than that of ITO and other similar products. A wet film on which silver nanowire dispersion liquid is coated is uniformly heated and dried by adopting a dynamic infrared heating method so that the silver nanowire transparent conductive thin-film with uniform electrical performance and optical performance is obtained. The silver nanowire transparent conductive thin-film of which average square resistance is lower than 35ohm / square, resistance non-uniformity is less than 7% in two-dimensional space and transmittance can be more than 95% can be obtained by utilizing the method.

Description

technical field [0001] The invention relates to the field of preparation of transparent conductive films, in particular to the preparation of silver nanowire transparent conductive films. Background technique [0002] Silver nanowire transparent conductive film is widely used in optoelectronic devices such as touch screens, organic solar cells, displays, especially the new generation of flexible It has important application prospects in electronic devices. The uniformity of the film is a problem that must be solved in the application of various transparent conductive films, which is directly related to the yield of the product. There are many methods for coating silver nanowire transparent conductive films, such as drop coating, vacuum filtration, spray coating, spin coating, and blade coating. In the spraying process, the uniformity of the film produced by the spraying process is relatively poor due to the uneven distribution of the dispersion liquid sprayed from the nozz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00B82Y30/00B82Y40/00
Inventor 叶长辉贾永高陈超季书林冉云霞王可
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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