Thin film spray coating machine and thin film preparation method

Abstract

The invention discloses a thin film spray coating machine, which comprises a spray head, and is characterized in that: the spray head is fixed on a three-dimensional adjusting frame and can move in a three-dimensional way; a post-treatment tank is arranged below the spray head; the bottom of the post-treatment tank is provided with a heat conducting plate; an electric heating plate is arranged below the heat conducting plate; and the post-treatment tank and a cover plate form a closed space. The invention also discloses a thin film preparation method, which comprises the following steps of: spray coating in the post-treatment tank to form a thin film; and then directly performing solvent vapor infiltration post-treatment on the thin film in the post-treatment tank. The thin film spray coating machine provided by the invention can be used for preparing a large-area thin film with uniform thickness, small error, high accuracy and adjustable shape and has high filming repeatability. Heating and solvent infiltration treatment functions are integrated; and laboratory film preparation and small-scale industrial film preparation are facilitated.

Description

technical field [0001] The invention relates to the field of film preparation and post-treatment, in particular to a film spraying machine and a film preparation method. Background technique [0002] Spraying technology is a coating method in which the paint is atomized by means of a spray gun and other spraying tools, and then sprayed onto the workpiece to be coated. Generally used in hardware, plastics, furniture, military industry, ships and other fields. In recent years, it has also been widely used in the field of large-area organic photovoltaic thin film preparation. However, the existing spraying devices have their specific application objects, have limitations in the field of changing the morphology of thin films, and are not suitable for preparing organic photovoltaic thin films. As shown in the literature of Advanced Functional Materials (Adv. Funct. Mater, 2010, 20, 3538), the films prepared by electrostatic spraying method generally have large particle island-l...

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Problems solved by technology

[0007] Among the existing film spraying machines, some use ultrasonic vibration nozzles to enhance the atomization effect, and some use ultrasonic vibration substrate tables to increase the uniformity of the film, but none of them is equipped with a solvent infiltration function unit to change the surface morphology of the film, and the formed film requires Solvent post-treatment can only be done after moving to a closed environment with a solvent vapor atmosphere. During the process of moving the formed film substrate, the film may be artificially damaged and affect the quality of the film.

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