Preparation method of flexible conductive electrode, electrode prepared by the method and application thereof

Abstract

The invention discloses a preparation method of a flexible conductive electrode, the electrode prepared by the method and its application. The preparation method comprises the following steps: (1) preparation of a photomask plate: photoetching a conductive wire grid onto a photomask; 2) Electrodeposition mold preparation: Then, the wire grid photomask is exposed to ultraviolet light to form a patterned wire grid groove; (3) Electrodeposition process: the metal substrate is placed in the electroforming deposition tank to form an electrodeposition layer ; (4) Generate flexible conductive electrodes: coat a layer of cured glue on the metal substrate, cover the flexible substrate on the cured glue, and release the mold after ultraviolet curing to obtain flexible conductive electrodes. The surface flatness of the flexible conductive electrode prepared by the present invention only depends on the surface flatness of the metal substrate material used, and has a relatively high flat surface, and the prepared OLED device will not cause the back electrode and the substrate to phase due to the large surface fluctuation of the transparent electrode. Contact, resulting in short circuit and damage, greatly improving the service life.

Description

Technical field [0001] The invention belongs to the technical field of flexible electronics manufacturing, and specifically relates to a method for preparing a flexible conductive electrode, an electrode prepared by the method, and an application thereof. Background technique [0002] OLED (organic electroluminescent device) has shown extremely broad application potential in new flat panel displays, solid-state lighting, flexible displays, green energy and other fields. Because OLED has many advantages such as low energy consumption, all solid-state, rich light-emitting colors, and flexible display. , Is considered to be one of the most promising flat panel display and lighting technologies. Especially flexible OLED devices, which can be bent and folded at will, are lightweight and ultra-thin, and can be widely used in smart wearable devices, decorative lighting and flexible display devices. [0003] However, the traditional flexible OLED device only replaces the base material fro...

AI Technical Summary

Problems solved by technology

For OLEDs, the thickness of the light-emitting layer is only about 100nm. If the surface roughness of the wire grid electrode is too large, it may cause the back electrode to contact the substrate, causing short circuit and damage to the device.

At present, the metal wire grid flexible electrode based on nanoimprinting and filling technology requires high-temperature sintering of conductive materials during the preparation process, so as the organic solvent in the conductive material volatilizes, it will cause partial depressions in the filled grooves.

And the depth of the depression is much larger than the device thickness of the OLED, so the OLED device prepared by this scheme is easily damaged during the working process, which seriously affects the service life of the device

However, the process of preparing metal wire grid electrodes based on nano-transfer printing technology requires an expensive vacuum coating process, which is complex and greatly increases production costs, which is not conducive to the low-cost and high-efficiency requirements of large-scale production.

[0009] In view of this, what the present invention intends to solve is the problems of complex OLED flexible transparent electrode preparation process, high cost, and low surface flatness (affecting the luminous efficiency and service life of the device) in the prior art. Preparation of flexible, embedded wire grid-type flexible conductive electrodes, and the flexible OLED devices with simple process, high luminous efficiency and long service life are prepared from the transparent electrodes

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