Perovskietcoating wordt gebruikt om perovskietzonnecellen te vervaardigen. 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. Echter, 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.

Perovskiet-coatingtechnologie: bereiding van zonnecelfilm

Coating method
Coating can be performed using different methods, including spin coating, spray coating, roll coating and scrape coating. Onder hen, 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

Eerst, 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, organic solvent, additive and stabilizer. Ensure that the concentration and composition of the precursor solution are correct.

Perovskiet-coatingtechnologie: bereiding van zonnecelfilm

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, om de hechting van de perovskiet aan het substraat te verbeteren.

coating

Giet de perovskietprecursoroplossing op het substraat en breng gelijkmatig aan met een draadschraper. De hoek van de schraper en de snelheid van het schrapen hebben invloed op de uniformiteit en dikte van de coating. Generally, hoe kleiner de hoek van de schraper, hoe dunner de coating. Zorg voor een uniforme coating om luchtbellen en defecten te voorkomen.

Perovskiet-coatingtechnologie: bereiding van zonnecelfilm

drogen

Nadat de coating is voltooid, het substraat wordt bij de juiste temperatuur gedroogd om de organische componenten te verwijderen en een stabiele perovskietfilm te vormen. Droogomstandigheden vereisen doorgaans nauwkeurige controle om de kwaliteit van de film te garanderen.

Elektrode toevoegen

Na voltooiing van de perovskietfilm, elektroden, meestal koolstof of metaal, zijn toegevoegd voor het verzamelen van elektrische stroom.

Perovskiet-coatingtechnologie: bereiding van zonnecelfilm

Testen en prestatie-evaluatie

Eindelijk, a series of tests and performance evaluations are performed to determine the performance of perovskite solar cells, including photocurrent-voltage characteristic curve measurements and long-term stability testing.

Applying perovskite is a complex process that requires precise control and skill. Daarom, training and practice in a laboratory or professional training environment is recommended before actual coating. By precisely controlling the coating process and the preparation of the precursor solution, perovskite solar cells with superior performance can be prepared, which is expected to provide a more competitive solution for the renewable energy sector.