Method and equipment for enhancing wettability of thin film by utilizing high-frequency micro-vibration

Abstract

The invention discloses a method and equipment for enhancing wettability of a thin film by utilizing high-frequency micro-vibration, and belongs to the technical field of material science and technology and thin film preparation. The method comprises the following steps: firstly, coating the surface of a solar cell substrate or a thin film with a coating substance system, enabling the solar cell substrate to vibrate by adopting a plurality of vibration sources to form a layer of liquid film on the surface of the solar cell substrate or the thin film, and secondly, drying and annealing the liquid film on the surface of the solar cell substrate or the thin film, and forming a wetting film on the surface of the solar cell substrate or film. Under the action of multi-source multi-direction high-frequency micro-vibration, a high-frequency dynamic wetting effect is continuously generated at the interactive front edge of the liquid film and the solar cell substrate or the thin film pit, so that bubbles in the pit are expelled, infiltration and filling of large-roughness, large-fluctuation and deep pits are realized, uncovered areas of the thin film and the solar cell substrate or the thinfilm are greatly reduced, the coating speed and the coating quality of the thin film are effectively improved, and a technical scheme is provided for cheap and rapid preparation of large-area perovskite solar cells.

Description

technical field

[0001] The invention belongs to the field of material science technology and thin film preparation technology, relates to the preparation of large-area thin films by solution method and its application in perovskite solar cells, in particular to a method and equipment for enhancing the wettability of thin films by using high-frequency micro-vibration. Background technique

[0002] With the impact of energy shortage and environmental deterioration on people's lives, the utilization and development of solar clean energy has become an important area of ​​concern. In the field of solar cells, photoelectric conversion materials with the ABX3 perovskite structure have been continuously explored by researchers because of their high photoelectric conversion efficiency, convenient solution preparation method, and excellent carrier transport performance. In the past ten years, the photoelectric conversion efficiency of perovskite solar cells has been rising from 3.9%. ...

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