Continuous coating system and coating method

Abstract

The invention discloses a continuous coating system and a coating method, belongs to the technical field of coating devices, and solves the problem that in the prior art, an organic semiconductor material cannot be used for accurately controlling the shape and a stacking structure of a film while being used for rapidly and efficiently preparing a film in a large area. The continuous coating system comprises a frame, a coating unit, a liquid supply device, a coating unit moving device, a temperature control base station unit and a base material conveying device, wherein the coating unit moving device, the temperature control base station unit and the base material conveying device are arranged on the frame, the base material conveying device is used for conveying a base material, the liquid supply device provides coating liquid for the base material, the coating unit is arranged on the coating unit moving device, and the coating unit moving device is used for controlling the distance and the angle between the coating unit and the base material, the coating unit is used for controlling the thickness and the appearance of a coating film by applying a shearing force to the coating liquid, the coating unit comprises a horizontal adjusting disc and a traction piece, and the horizontal adjusting disc is used for adjusting the pitch angle so as to ensure that the initial position of the traction piece is horizontal. According to the continuous coating system and a coating method, the preparation of the large-area orderly-arranged organic thin film is realized.

Description

technical field [0001] The invention belongs to the technical field of coating devices, in particular to a continuous coating system and a coating method. Background technique [0002] Organic semiconductor materials have become one of the research hotspots in organic electronics due to their diversity of molecular structures and great potential in flexible display, energy storage and conversion. With the functional breakthroughs and application prospects of flexible electronic devices in the fields of media media, health monitoring, and clean energy, the large-area, low-cost, and high-quality solution processing of organic semiconductor materials has become one of the difficulties in the field. [0003] For organic electronics research, the organic layer is a key region for charge transport. At normal temperature, the charge transport between molecules in the organic layer mainly depends on the hopping mode, so the distance and packing mode between molecules / molecular laye...

AI Technical Summary

Problems solved by technology

[0004] Existing solution processing technologies such as film throwing, dripping film, inkjet printing, gravure printing, etc. can also be operated quickly, but most of the formed organic films have disordered molecular accumulation (a small part of the polymer film can be improved by annealing). Molecular orientation within the film), but most of the solution is wasted in the film throwing method

The preparation of organic films by flinging film, dripping film, and inkjet printing is limited to laboratory-scale small (flicking film<3cm*3cm; dripping film can be larger in principle, but this process of natural volatilization of solvent will produce obvious aggregation boundary and discontinuity; although inkjet printing can print a large area, the speed will be very slow, requiring continuous superimposition and coverage of droplets, involving continuous precipitation-dissolution-re-precipitation of molecules, and it is difficult to obtain morphology and order control) thin film preparation on rigid substrates; while the material utilization rate of gravure and other printing technologies is very low. For most of the molecular materials synthesized by independent design, it is impossible to support the synthesis of materials required for mass printing.

Therefore, it is very difficult to efficiently use materials to prepare large-area ordered organic thin films.

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