Preparation method of few-layer organic crystalline state film and organic field effect transistor

Abstract

The invention provides a preparation method of a few-layer organic crystalline state film and an organic field effect transistor. The preparation method comprises the following steps: providing an organic small molecular semiconductor material, and selecting a good solvent and a bad solvent of the organic small molecular semiconductor material, wherein the good solvent and the poor solvent have different evaporation rates and different densities and are mutually soluble; mixing the good solvent and the poor solvent according to a volume ratio of a specified proportion range to form a mixed system of the good solvent and the bad solvent, wherein the specified proportion range is 9:1-12:1; adding the organic small molecular semiconductor material into the mixed system and carrying out stirring to form a mixed solution of the organic small molecular semiconductor material, wherein the concentration of the mixed solution is 0.5-1.5mg / ml; and weighing a predetermined amount of the mixed solution, and applying the mixed solution to the edge of a hydrophilic solid substrate, thereby generating the few-layer and uniform organic crystalline state film by self-assembly. According to the method disclosed by the invention, a one-step method can be used for directly and rapidly obtaining a high-uniformity few-layer organic crystalline state film structure ordered in a long-range surface.

Description

technical field [0001] The invention relates to the technical field of organic semiconductors, in particular to a preparation method of a few-layer organic crystalline film and an organic field effect transistor. Background technique [0002] In recent years, organic small molecule single crystal materials have been favored by researchers due to their few grain boundaries, long-range molecular arrangement, high device performance, wide range of material sources, low cost, flexibility, and good adjustability and adaptability. , and are widely used in organic light-emitting diodes, organic solar cells, photodetectors and organic field-effect transistors and other fields. [0003] At present, among the methods for preparing organic single crystals, various solution methods are dominant, which can be used to achieve low-cost and high-yield preparation of electronic devices. Among them, the pulling method and scrape coating method are widely used, but the organic single crystals...

AI Technical Summary

Problems solved by technology

Among them, the pulling method and scrape coating method are widely used, but the organic single crystals obtained by these two methods have a common feature, that is, the crystal stacking direction has a large thickness, which is easy to cause contact resistance and channel resistance. Larger, it limits the transport of carriers, which is not conducive to the improvement of device performance. Moreover, it can be seen from the test results that the line shape of the data curve is also very unsatisfactory.

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