Processing method for silver nanowire conductive thin film

A technology of silver nanowires and conductive films, which is applied in the direction of circuits, electrical components, metal/alloy conductors, etc., can solve the problems of difficult industrial production, complicated process, and high production cost, and achieve simple methods, reduced roughness, and low cost. Effect

Inactive Publication Date: 2016-07-27
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The treatment of silver nanowire films has also attracted much attention. Cui Yi et al. of Stanford University in the United States have enhanced the conductivity of silver nanowires and reduced the surface roughness, but the preparation cost of this method is high, the process is complicated, and it is not easy for industrial production

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  • Processing method for silver nanowire conductive thin film
  • Processing method for silver nanowire conductive thin film
  • Processing method for silver nanowire conductive thin film

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preparation example Construction

[0030] The preparation method of silver nanowire ethanol solution comprises the following steps:

[0031] 1) Add 16ml of ethylene glycol, 0.01g of sodium bromide, and 0.66g of polyvinylpyrrolidone into the reactor, then stir and heat to 165°C. Finally add 0.05g of silver chloride, after reacting for 3min, slowly add 4ml of ethylene glycol solution containing 0.22g of silver nitrate, the dropping rate is 0.4ml / min, the reaction time is 30min, and cooled to room temperature to obtain silver nanometer mother liquor.

[0032] 2) Pour the silver nanowire mother liquor into a centrifuge tube, centrifuge at 2000rpm for 30min, discard the precipitate, keep the upper silver nanowire mother liquor, add ethanol with 4 times the volume of the silver nanowire mother liquor, and then centrifuge at 6000rpm and remove The supernatant was repeated three times, and finally the precipitate was extracted and dispersed with ethanol to obtain an ethanol solution of silver nanowires.

Embodiment 1

[0034] Nitric acid treatment enhances the method for the conductivity of silver nano film, comprising the following steps:

[0035] 1) configure 5 mg / ml silver nanowire ethanol solution with the silver nanowire synthesized above;

[0036] 2) Clean the glass slides, ultrasonically clean them in deionized water, ethanol, and isopropanol for 15 minutes, and dry them;

[0037] 3) Silver nanowire conductive film was prepared by spin coating method, the spin coating speed was 1000rpm, dried at room temperature for 1h, and its square resistance was tested by four-probe square resistance meter;

[0038] 4) Prepare a dilute nitric acid solution with a concentration of 0.2M with deionized water;

[0039] 5) Immerse the silver nano film in dilute nitric acid for 5 minutes, take it out and then immerse it in the ethanol solution and take it out quickly, N 2 Blow dry, dry at room temperature for 1 hour, and test its square resistance.

Embodiment 2

[0041] Hydrochloric acid treatment strengthens the method for silver nano film electrical conductivity, comprises the following steps:

[0042] 1) Using the silver nanowires synthesized above, configure a 10 mg / ml silver nanowire ethanol solution;

[0043] 2) Clean the glass slides, ultrasonically clean them in deionized water, ethanol, and isopropanol for 20 minutes, and dry them;

[0044] 3) Prepare silver nanowire conductive film by spin coating method, spin coating speed is 3000rpm, dry at room temperature for 0.5h, utilize four-probe square resistance meter to test its square resistance;

[0045] 4) Prepare a dilute hydrochloric acid solution with a concentration of 0.1M with deionized water;

[0046] 5) Immerse the silver nano film in dilute nitric acid for 15 minutes, take it out and then immerse it in the ethanol solution and take it out quickly, N 2 Blow dry, dry at room temperature for 2 hours, and test its square resistance.

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Abstract

The invention discloses a processing method for a silver nanowire conductive thin film, and belongs to the technical field of a flexible electronic material and a thin film. According to the processing method, the photoelectric property of the silver nanowire conductive thin film is improved mainly by acid treatment on the silver nanowire conductive thin film. The processing method has the advantages of (1) the process is simple and is easy to operate; (2) silver oxide on the surface of the silver nanowire conductive thin film is efficiently removed; (3) the surface flatness of the silver nanowire conductive thin film is improved; and (4) the conductivity of the silver nanowire conductive thin film is improved, and the square resistance of the thin film is reduced.

Description

technical field [0001] The invention relates to the technical field of flexible electronic materials and thin films. Specifically, it relates to a treatment method of a silver nanowire conductive film that can improve the conductivity of the film and reduce the square resistance of the film. technical background [0002] Conductive thin films are widely used in optoelectronics and microelectronics, such as information display, information storage, energy conversion, bioelectronics and other devices. Currently, the most common conductive thin films are metal oxide thin films based on traditional inorganic materials, such as ITO, IZO, etc. However, rare earth metals are increasingly scarce, resulting in increasingly expensive prices. With the rapid development of flexible electronics, people have a strong demand for products such as future mobile terminals, wearable devices, and smart home appliances. It is of great significance to develop electronic materials and thin-film ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B1/02
Inventor 刘举庆黄维刘洋曹立君
Owner NANJING UNIV OF TECH
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