Organic monocrystal field effect circuit and preparation method thereof

Abstract

The invention discloses an organic monocrystal field effect circuit and a preparation method thereof. The preparation method comprises the following steps of: preparing a circuit mask plate; preparing a flexible plane internally-embedded laminated electrode with a circuit pattern, including, 1) connecting octadecyl trichlorosilane on a surface of a substrate, 2) preparing a source electrode, a drain electrode and a grid electrode on the modified substrate respectively, and connecting with mercaptopropyl trimethoxy silane, 3) spin-coating polydimethylsiloxane on the metal electrode surfaces of the source electrode, the drain electrode and the grid electrode, 4) transferring the grid electrode on which the polydimethylsiloxane is spin-coated, performing oxygen plasma processing on the metal electrode surface of the grid electrode, and the polydimethylsiloxane surfaces of both the source electrode and the drain electrode respectively to form oxhydryl, and 5) shearing the source electrode and the drain electrode, and connecting the grid electrode, the source electrode and the drain electrode to form an integral body so as to obtain the flexible plane internally-embedded laminated electrode; preparing the organic monocrystal field effect circuit. As a high-precision photo-etching technology is adopted to prepare the electrodes in the invention, high-precision and complex patterns can be prepared, and the preparation method is convenient and practical.

Description

technical field [0001] The invention relates to an organic single crystal field effect circuit and a preparation method thereof, belonging to the field of organic electronics. Background technique [0002] After the rapid development of inorganic integrated circuits, the first real organic circuit did not appear until 1995. Philips Laboratories used pentacene and polyvinylthiophene to realize a series of basic circuit units such as inverters (Science1995 ,270,972), thus setting off a new chapter in the study of organic field effect circuits. Compared with inorganic materials, organic materials have many inherent advantages such as simple film-forming process, wide range of material sources, good compatibility with flexible substrates, and easy modulation of electrical properties (Nature, 2001, 414, 599; Chemical Reviews 2012, 112, 2208; Nature 2013 , 499, 458; Journal of the American Chemical Society 2004, 126, 8138). Therefore, the research on organic field effect transis...

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Problems solved by technology

But there are also some shortcomings: on the one hand, the structure of the bottom contact organic single crystal field effect circuit reported so far is as follows: figure 1 As shown, the electrode protrudes from the surface of the insulating layer. This structure is more suitable for larger-sized crystals, which limits the size of the crystals used.

Because when the organic micro / nano semiconductor is transferred to this structure electrode, such as figure 2 As shown in the figure, due to the protruding structure of the electrodes, the organic semiconductor cannot be completely bonded to the insulating layer, and air gaps are easily formed near the electrodes.

This will lead to uneven conduction channel of the device and affect the performance of the device.

On the other hand, the bottom-contact organic single crystal field-effect circuits reported so far are all prepared on rigid substrates, which may cause poor contact quality between semiconductors, electrodes and insulating layers, and are prone to defects, resulting in reduced device performance.

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