Preparation method of transparent conductive electrode

Abstract

The invention provides a method for preparing a transparent conductive electrode, comprising the following steps: coating silver nanowires on a substrate to form a silver nanowire conductive film; coating a matrix on the silver nanowire conductive film, and the matrix covers or half covers The silver nanowire constitutes a conductive layer; a mask plate with a through hole is placed above the conductive layer, and the conductive layer covered by the mask plate constitutes a first region; a pretreatment liquid is used to pass through the through hole outward The exposed conductive layer is treated to increase the exposed amount of the silver nanowires on the surface of the substrate, and at the same time convert at least part of the surface of the silver nanowires into a refractory salt; use an etching solution to treat the conductive layer after the pretreatment agent processing to form the second region. In this method, the conductive layer is treated with a pretreatment solution to increase the number of exposed silver nanowires; at the same time, an insoluble silver salt is formed on the surface of the silver nanowires to reduce the oxidation potential of silver, so as to reduce the etching conditions of the silver nanowires, thereby reducing the subsequent Process etch marks.

Description

technical field [0001] The invention relates to the field of preparation of transparent conductive electrodes, in particular to a preparation method of transparent conductive electrodes. Background technique [0002] Silver nanowire transparent conductive film has flexible characteristics, so it has a wide range of applications in flexible displays, touch sensors, solar cells, wearable devices and other fields. [0003] In the above applications, the conductive layer composed of silver nanowires needs to be patterned and processed. Specifically, it can be processed by dry method, such as laser etching; wet method, such as inkjet printing etchant, silk screen etching paste and etching solution. Among them, wet etching has more advantages in production efficiency than laser etching, especially the yellow photolithography process can be operated through roll-to-roll, which can greatly increase the output. [0004] However, wet etching uses chemical reagents to react with silve...

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Problems solved by technology

[0004] However, wet etching uses chemical reagents to react with silver nanowires, which may lead to a decrease in the density of silver nanowires in the etched area, a thinner diameter, or a shorter length, resulting in a contrast between the appearance of the etched area and the non-etched area, which affects the optics of the final product. performance