Method for preparing silver nanowire transparent electrode in large area and silver nanowire transparent electrode

A technology of silver nanowires and transparent electrodes, which is applied in the field of optoelectronics, can solve the problems such as the inability to realize the preparation of large-area silver nanowire transparent electrodes, achieve excellent conductivity and transmittance, expand the application range, and have high repeatability and reliability Effect

Active Publication Date: 2017-01-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In short, none of the existing methods can realize the preparation of large-area silver nanowire transparent electrodes.

Method used

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  • Method for preparing silver nanowire transparent electrode in large area and silver nanowire transparent electrode
  • Method for preparing silver nanowire transparent electrode in large area and silver nanowire transparent electrode
  • Method for preparing silver nanowire transparent electrode in large area and silver nanowire transparent electrode

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Effect test

Embodiment 1

[0031] The preparation method of the silver nanowire transparent electrode of the present embodiment comprises the following steps:

[0032] (1) Preparation of silver nanowire-photoresist suspension

[0033] Take an appropriate amount of silver nanowire solution, and use a centrifuge to separate the silver nanowire and solvent. After removing the solvent, mix the bottom silver nanowire with a positive photoresist (such as polymethyl acrylate PMMA, an electron beam sensitive positive photoresist). In the photoresist), shake until the silver nanowires are evenly dispersed in it to form a silver nanowire-photoresist suspension, where the concentration of the silver nanowires is about 5 mg / mL;

[0034] (2) Prepare the transparent substrate

[0035] Choose quartz glass with a diameter of 4'' as the transparent substrate, ultrasonically clean it with acetone, methanol, and isopropanol at room temperature for 5 minutes, soak in the mixed solution of ammonia water and hydrogen peroxi...

Embodiment 2

[0042] The preparation method of the silver nanowire transparent electrode of the present embodiment comprises the following steps:

[0043] (1) Preparation of silver nanowire-photoresist suspension

[0044] Take an appropriate amount of silver nanowire solution, and use a centrifuge to separate the silver nanowire and solvent. After removing the solvent, mix the bottom silver nanowire into negative photoresist (such as SU-8 series photoresist), and shake until the silver nanowire The wires are evenly dispersed in it to form a silver nanowire-photoresist suspension;

[0045] (2) Prepare the transparent substrate

[0046]Choose quartz glass with a diameter of 4'' as the transparent substrate, ultrasonically clean with acetone, methanol, and isopropanol at room temperature for 5 minutes, soak in ammonia water and hydrogen peroxide mixed solution at room temperature for 10 minutes, soak in piranha solution at room temperature for 20 minutes, and blow dry with dry nitrogen. Dry ...

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Abstract

The invention discloses a method for preparing silver nanowire transparent electrodes at a large scale and the silver nanowire transparent electrode. The method comprises the steps of an appropriate amount of a silver nanowire solution, separating out silver nanowires and a solvent by use of a centrifuge, removing the solvent, doping the bottom silver nanowires into a photoresist, shaking until the silver nanowires are evenly dispersed into the photoresist, thereby forming a silver nanowire-photoresist suspension, evenly applying the suspension to a clean transparent substrate in a spin-coating manner to form a silver nanowire-photoresist film, immersing the transparent substrate spin-coated with the silver nanowire-photoresist film into a photoresist removing solution to remove the surface photoresist, taking out the transparent substrate, and after the solution on the surface of the transparent substrate, forming an even silver nanowire network on the transparent substrate by the left silver nanowires, namely the silver nanowire transparent electrode. The silver nanowire transparent electrode has excellent electrical conductivity, transmittance and homogeneity; the method has nothing to do with the area and the surface shape of the substrate, and also has no strict relation with the quantity of the photoresist dripped, and is high in repeatability and reliability and suitable for large-scale batch production.

Description

technical field [0001] The invention belongs to the technical field of optoelectronics, and in particular relates to a method for preparing silver nanowire transparent electrodes in a large area. Background technique [0002] Transparent electrode is a thin film material with high conductivity and high visible light transmittance at the same time. It is the core component of optoelectronic devices such as light-emitting diodes, solar cells, liquid crystal displays, and touch screens. At present, the most widely used transparent electrode materials are metal oxide semiconductors, such as indium tin oxide (ITO). Despite its high conductivity and high transmittance, ITO still has some inherent material property problems. First of all, the indium element in ITO is a scarce material with high price and high cost, and the indium reserves on the earth are far from meeting people's increasing demand for transparent electrodes. Secondly, metal oxide semiconductors are mostly cerami...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00H01B1/02
Inventor 杨柳寇鹏飞迟克群何赛灵
Owner ZHEJIANG UNIV
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