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

A wettability and thin film technology, applied in the fields of material science and technology and thin film preparation, can solve the problems of film interface defects, low-voltage equipment production costs, etc., and achieve the effect of reducing production costs, large roughness, and reducing uncovered areas.

Pending Publication Date: 2021-03-12
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a method and equipment for enhancing the wettability of thin films by using high-frequency micro-vibration, so as to solve the problems caused by the introduction of interfacial bubbles in the preparation of large-area perovskite solar cell thin films. Technical problems that cause defects at the interface of the film layer, as well as the production cost of low-voltage equipment

Method used

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

Examples

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Effect test

Embodiment 1

[0039]1) Using DMF as a solvent, prepare CH with a concentration of 50% by mass 3 NH 3 PB 3 solution, the vibration frequency is 250kHz, the amplitude is 20nm, and a liquid film with a thickness of about 1000nm is prepared on the glass conductive substrate FTO with a substrate fluctuation of 250nm by a slit coating method;

[0040] 2) The liquid film is quickly dried at 10°C by air extraction method;

[0041] 3) Place the dried film on a hot plate at 70° C. for 15 minutes to obtain a transparent dark brown perovskite film on the glass conductive substrate FTO.

Embodiment 2

[0043] 1) Using DMSO as a solvent, prepare CH(NH with a mass percentage concentration of 40% 2 ) 2 PB 3 solution, the vibration frequency is 300kHz, the amplitude is 15nm, and a liquid film with a thickness of about 2000nm is prepared on the glass conductive substrate ITO with a substrate fluctuation of 200nm by spray deposition method;

[0044] 2) Using the air knife method, the liquid film is quickly dried at 30°C;

[0045] 3) Place the dried film on a hot plate at 100° C. for 10 minutes to obtain a transparent dark brown perovskite film on the glass conductive substrate ITO.

Embodiment 3

[0047] 1) Using a mixed solvent of DMF and NMP as a solvent, prepare a PCBM solution with a mass percentage concentration of 5%, the vibration frequency is 400kHz, and the amplitude is 20nm, and a perovskite film with a substrate fluctuation of 500nm is prepared by a scraping method. A liquid film with a layer thickness of about 3000nm;

[0048] 2) The liquid film is quickly dried at 50°C by air extraction method;

[0049] 3) Place the dried film on a hot plate at 120° C. for 8 minutes to obtain a transparent and bright dark brown perovskite film on the surface of the flexible conductive substrate ITO.

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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%. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/42
CPCH10K71/12H10K71/40H10K30/10Y02E10/549
Inventor 杨冠军刘梅军张高刘研李长久
Owner XI AN JIAOTONG UNIV
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