Silver nanowire-biological material composite transparent conductive film and preparation method and application thereof

Abstract

The invention discloses a silver nanowire-biological material composite transparent conductive film as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing a silver nanowire solution (AgNWs solution) and a biological material solution; cleaning the substrate to obtain a pretreated substrate; scraping an AgNWs solution on the pretreated substrate, and then heating and curing to form an AgNWs film; and then coating a biological material solution on the AgNWs film, and then heating and curing to form the AgNWs / biological material composite transparent conductive film. By adopting the method disclosed by the invention, an environment-friendly biological modification material can be utilized, so that the metal nanowire transparent conductive film can obtain a flat film surface, excellent mechanical stability, water and oxygen corrosion resistance, acid corrosion resistance, high temperature resistance and the like on the premise of keeping good photoelectric properties.

Description

technical field [0001] The invention belongs to the technical field of electronic devices, and in particular relates to a silver nanowire-biological material composite transparent conductive film and a preparation method and application thereof. Background technique [0002] ITO (Indium Tin Oxide) has high visible light transmittance and high electrical conductivity. It is often used as electrodes for devices such as OLEDs, solar cells, touch screens and sensors, and occupies a large market share. However, indium resources are scarce, brittle, and the preparation process is complicated, which greatly limits its application in the field of flexible electronics. Researchers are working on the development of second-generation flexible transparent electrodes, such as flexible transparent conductive materials such as carbon-based materials, metal nanowires, ultrathin metals, and conductive polymer electrodes. [0003] Among these flexible transparent electrode materials, silver ...

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Problems solved by technology

However, AgNWs also has its own disadvantages: the stacking of nanowires will cause the surface roughness of the nanowire network to be large, which is often easy to cause short circuit of the device; in addition, AgNWs are easily oxidized when exposed to the air environment. If it is in a high temperature and high humidity environment, The oxidation of AgNWs will be more serious, which will greatly damage the performance of AgNWs conductive network.

For example, Lee et al. used the layer-by-layer self-assembly (LBL) method to deposit graphene oxide GO on the silver nanowire film, and obtained a composite electrode with good mechanical stability, but a certain thickness GO will reduce the photoelectric performance of silver nanowire electrodes (Adv. Mater. 2015, 27, 2252–2259); Kim et al. used the method of sputtering zinc oxide (ZnO) to prepare a three-layer structure ZnO / AgNWs / ZnO composite electrode , the composite transparent electrode has high mechanical and thermal stability, but also, the ZnO capping layer will reduce the transmittance of the silver nanowire film (ACS Nano 2013, 7, 2, 1081–1091)

These methods are difficult to improve the stability of the silver nanowire electrode without affecting the photoelectric performance of the electrode itself. In addition, the modification materials used in these methods are not biocompatible and environmentally friendly materials.

Recently, Jin et al. used chitosan to modify the nanowire electrode to prepare a composite electrode with a flat surface, but chitosan would decompose and turn black at a certain temperature, resulting in a decrease in the transmittance of the composite electrode (ACS Appl. Mater . Interfaces 2017, 9, 4733−4741)

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