A high-performance large-area flexible transparent electrode and its preparation method and application

Abstract

The invention relates to a high-performance large-area flexible transparent electrode and a preparation method and application thereof. The specific steps are: 1) Using the electric field-driven jet micro-nano 3D printing technology, using the metal nano-paste as the printing material, the metal patterned structure is printed on the printing substrate by micro-nano 3D multi-layer printing, and then the metal pattern is printed on the printing substrate. 2) Transfer of PDMS concave mold; 3) Transfer of UV photoresist convex mold; 4) Preparation of composite soft mold; 5) Preparation of embedded flexible transparent conductive film. The microstructure manufacturing with a diameter of 10-15 μm and an aspect ratio of 0.5 to 4.0 is realized, and a transparent electrode structure with high light transmittance and low square resistance can be obtained.

Description

technical field [0001] The invention belongs to the technical field of transparent electrode manufacturing, and in particular relates to a high-performance large-area flexible transparent electrode and a preparation method and application thereof. Background technique [0002] The information disclosed in this Background section is only for enhancement of understanding of the general background of the invention and should not necessarily be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art. [0003] Transparent electrodes are one of the optoelectronic devices that can both conduct electricity and have high transmittance in the visible light range. Due to their excellent optical transmittance, electrical conductivity, flexibility and stability, they are widely used in touch screens, transparent displays, wearable Devices, flexible thin-film solar cells, EMI shielding windows, ...

AI Technical Summary

Problems solved by technology

Although the method of combining nanoimprinting and scraping coating can realize the manufacture of flexible transparent conductive film embedded in metal mesh, which has the advantages of high efficiency and good consistency, but the equipment is expensive and the requirements for nano conductive ink are strict (metal content, surface Tension, sintering temperature, etc.), and it is difficult to realize the manufacture of large-width metal grid structures (difficult to fill conductive ink, difficult to release molds when imprinting large-area and large-width-ratio structures, and easy to cause damage to molds and embossed features)

Micro-transfer printing (positive transfer printing, negative transfer printing, printing transfer printing) method, although the process is simple and easy to operate, but the transfer printing materials are limited, especially the printing transfer printing technology, which needs multiple transfer printing, transfer printing The efficiency is relatively low, and inkjet printing and electrospray printing are difficult to print high metal content and large aspect ratio microstructures

In summary, high-performance embedded metal mesh (large aspect ratio, high resolution, high light transmittance, low square resistance) low-cost, mass-scale manufacturing technology is still difficult to achieve

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