Etching method of silver nanowire, transparent conductive electrode and preparation method thereof

Abstract

The invention provides a transparent conductive electrode, which includes a substrate and an electrode layer on the substrate. The electrode layer includes: a first region with several interconnected silver nanowires; a second region with several severed silver nanowires. For silver nanowires, the distance between two adjacent segments of silver nanowires in the severed silver nanowires is not greater than 1000nm. In the transparent conductive electrode of the present invention, the silver nanowires in the second area are cut off, and an effective conductive network cannot be formed, and the electrical difference between the first area and the second area is relatively large; and the distance between two adjacent sections of silver nanowires is not the same. If it is larger than 1000nm, the etching marks of the silver nanowires are relatively shallow, the difference in optical properties between the first region and the second region is small, and the visual difference in appearance is very small, and the appearance of the display screen prepared therefrom is basically the same.

Description

technical field [0001] The invention relates to the field of preparation of transparent conductive electrodes, in particular to a nano-silver etching method with shallow etching marks, a transparent conductive electrode and a preparation method thereof. Background technique [0002] In the fields of touch screens, optoelectronics, and display screens, transparent conductive films are mainly made of metal oxides, such as indium tin oxide (ITO) materials. However, the ITO conductive film needs to be prepared by vacuum physical deposition and high-temperature annealing process, so there is a disadvantage of high square resistance when preparing a conductive film based on a polymer film. In addition, because ITO materials are easily broken and damaged under bending and external force, it is also difficult to apply to flexible devices. [0003] At present, a product that can replace ITO film as a transparent conductive electrode material is silver nanowire conductive film. Silve...

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Problems solved by technology

It is also possible that the silver nanowires are directly oxidized into silver ions, resulting in a decrease in the density of the silver nanowires or thinning of the wires.

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