Organic field effect tube using single molecular layer as oriented transfer layer and its preparing method

Abstract

This invention provides an OFET device and its preparation method including an orientation transfer layer for transferring orientation efficiency, which can increase the carrier mobility of the OFET since the orientation transfer layer is the insulation one. Said one is a mono-film formed by processing the surface with silane coupler which can optimize the orientation result of the orientation layer and transfer it to the organic layer. This invention can improve molecular arrays of the organic molecular layer by transferring the orientation result to improve the carrier mobility of the OFET devices applying said orientation layer.

Description

technical field [0001] The invention belongs to the technical field of organic field effect tubes (OFETs), and in particular relates to an organic field effect tube using a monomolecular layer as an orientation transfer layer and a preparation method thereof. technical background [0002] The field effect transistor is a semiconductor device that uses the magnitude of the gate voltage to adjust the carrier density between the source and drain electrodes, thereby controlling the on-off of the channel current and forming a switching characteristic. Organic Field Effect Transistor (OFET) is a semiconductor device that uses organic materials as insulating layer and semiconductor layer, and its basic principle is basically the same as that of non-field effect transistor devices. However, compared with field effect tubes without field effects, it has the advantages of simple process, low cost, and can be made into flexible devices. After more than ten years of research, the perfo...

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Problems solved by technology

At the same time, some researchers also used the L-B monolayer technology to form an ordered film formation of the organic layer [8,9]. However, the orientation effect of the OFET device prepared by this method is not obvious, so the performance of the device is not greatly improved.

[0003] Although there has been a lot of research on orientation means and orientation technology, its effect is not obvious.

Although rubbing orientation has the best orientation effect, since the current research is all contact rubbing against the insulating layer or organic layer, it may cause dust pollution and static electricity, which will affect the yield of the device, because the deposition of the insulating layer Or organic layer devices can no longer be cleaned as thoroughly as ITO glass substrates

Although photo-orientation is a non-contact orientation method, its orientation effect depends on the intensity of ultraviolet light and the matching degree of ultraviolet light and insulating layer materials, and current studies have shown that the effect of photo-orientation is significantly weaker than that of rubbing orientation; L-B single molecule Layer-by-layer film formation technology is a film-forming method with simple film formation and orderly molecular arrangement, but the anisotropic effect of its film formation is far lower than that of rubbing orientation and photo-orientation, and the device performance needs to be improved.

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