Large-area ultrathin high-crystalline-state two-dimensional conjugated polymer film as well as preparation method and application thereof

Abstract

The invention discloses a large-area ultrathin high-crystalline-state two-dimensional conjugated polymer film as well as a preparation method and application of the large-area ultrathin high-crystalline-state two-dimensional conjugated polymer film. According to the preparation method, a chemical vapor deposition method is utilized, a solid source is subjected to an interfacial copolymerization reaction on the surface of a substrate, and the two-dimensional conjugated polymer film is prepared. The method is good in universality, easy and convenient to operate, low in cost, and high in mass production capacity under conditions of low temperature and normal pressure. The area of the two-dimensional conjugated polymer film can reach a level of centimeter or more; the thickness of the two-dimensional conjugated polymer film can be within 20 nanometers; the area of the two-dimensional conjugated polymer film is 1 square centimeter or above, and the thickness of the two-dimensional conjugated polymer film is 0.1-20 nm; and the two-dimensional conjugated polymer film can be applied to electronic devices, photoelectricity, photovoltaics, solar cells, energy storage, gas storage and separation and field effect transistors.

Description

technical field [0001] The invention belongs to the technical fields of two-dimensional materials and organic electronics, and in particular relates to a large-area ultra-thin high-crystalline two-dimensional conjugated polymer film and its preparation method and application. Background technique [0002] In the past ten years, the research on one-dimensional conjugated polymer materials has been very mature, and it has shown important applications in fields such as organic field effect transistors (OFETs), organic solar cells (OPVs), and organic light-emitting diodes (OLEDs). prospect. At the same time, graphene and two-dimensional ultra-thin materials similar to graphene are greatly favored by researchers because of their thickness below ten nanometers, ultra-high aspect ratio and excellent optical, electrical and magnetic properties. attention and interest. For two-dimensional ultrathin materials similar to graphene, inorganic two-dimensional materials, such as transiti...

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Problems solved by technology

[0003] Although some methods have been used to prepare two-dimensional conjugated polymer materials (see S.Chandra et al., J.Am.Chem.Soc.2013, 135, 17853-17861), the prepared two-dimensional conjugated polymer Most of the materials are conjugated organic frameworks (Covalent Organic Frameworks, abbreviated as COF) materials. From the perspective of macroscopic size, these materials are mostly in the form of powder or block, not really two-dimensional with ultra-high aspect ratio. Ultra-thin materials, and there are strong π-π interactions between material layers, which are difficult to peel off. It is still a huge challenge to obtain single-layer and few-layer COF materials through a simple method

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