Perowskit-Beschichtung wird zur Herstellung von Perowskit-Solarzellen verwendet. Perovskite solar cell is a new type of solar cell technology, which has the characteristics of effectively converting solar energy into electricity. With the rise of renewable energy, the continuous progress of solar cell technology has become an area of concern. Within this field, perovskite solar cells have attracted widespread interest because of their potential to efficiently convert solar energy into electricity. Jedoch, one of the keys to the preparation of high-quality perovskite solar cells is the process of coating perovskite films.

Basic principle
A key part of perovskite solar cells is the perovskite light absorption layer, which is usually a thin film that converts sunlight into electricity. Perovskite materials are usually organic-inorganic mixtures with good photoelectric properties. Coating is the process of uniformly coating perovskite material on a conductive substrate such as FTO conductive glass or conductive polymer film.

Perowskit-Beschichtungstechnologie: Vorbereitung der Solarzellenfolie

Coating method
Coating can be performed using different methods, including spin coating, spray coating, roll coating and scrape coating. Darunter, spin coating and scratch coating are common methods. In the spin coating process, a liquid perovskite precursor solution is dropped onto a rotating substrate, distributing the liquid evenly and forming a film by the force of rotation. In the scraping coating, the R&D personnel use the automatic flat film coating machine with the wire rod scraper for accurate film production.

It is a common method to prepare perovskite solar cells by coating perovskite films with a wire-blade coating machine. Here are the general steps:

Substrate preparation

Erste, prepare a suitable substrate, usually FTO (conductive glass) or other transparent conductive material. Ensure that the substrate surface is clean, flat and dust-free.

Preparation of perovskite precursor solution

Preparation of perovskite precursor solution, including perovskite precursor substance, organische Lösung, additive and stabilizer. Ensure that the concentration and composition of the precursor solution are correct.

Perowskit-Beschichtungstechnologie: Vorbereitung der Solarzellenfolie

Adjusting scraper

Select the appropriate width of the wire rod scraper, the width of which determines the thickness of the perovskite film after coating. Generally, a wider scraper can be used for a thicker coating and a narrower scraper for a thinner coating.

Treatment before coating

Before coating, it is sometimes necessary to apply some treatment steps on the substrate, such as pre-coating a titanium ion solution or surface treatment, to enhance the adhesion of the perovskite to the substrate.

Beschichtung

Pour the perovskite precursor solution onto the substrate and apply evenly with a wire bar scraper. The Angle of the scraper and the speed of scraping will affect the uniformity and thickness of the coating. Generally, the smaller the Angle of the scraper, the thinner the coating. Ensure uniform coating to avoid bubbles and defects.

Perowskit-Beschichtungstechnologie: Vorbereitung der Solarzellenfolie

Trocknen

After the coating is complete, the substrate is dried at the appropriate temperature to remove the organic components and form a stable perovskite film. Drying conditions usually require precise control to ensure the quality of the film.

Add electrode

After completing the perovskite film, electrodes, usually carbon or metal, are added for the collection of electrical current.

Perowskit-Beschichtungstechnologie: Vorbereitung der Solarzellenfolie

Testing and performance evaluation

Endlich, Um die Leistung von Perowskit-Solarzellen zu bestimmen, werden eine Reihe von Tests und Leistungsbewertungen durchgeführt, einschließlich Photostrom-Spannungs-Kennlinienmessungen und Langzeitstabilitätstests.

Das Auftragen von Perowskit ist ein komplexer Prozess, der präzise Kontrolle und Geschick erfordert. daher, Vor der eigentlichen Beschichtung wird eine Schulung und Übung in einem Labor oder einer professionellen Schulungsumgebung empfohlen. Durch die präzise Steuerung des Beschichtungsprozesses und der Vorbereitung der Precursor-Lösung, Perowskit-Solarzellen mit überlegener Leistung können hergestellt werden, Es wird erwartet, dass es eine wettbewerbsfähigere Lösung für den Sektor der erneuerbaren Energien bietet.