Perovskite Battery Packaging Technology
Perovskite Battery Packaging Technology – Perovskite Solar Cell Coatings – Cheersonic
As the brightest star in the third generation of solar cells, the energy efficiency of perovskite solar cells has increased from 3.8% to 25.2% in just ten years, and due to its low manufacturing cost, it is expected to play a huge role in the field of decarbonized energy.
Currently, there are two common battery packaging technologies for perovskite solar energy:
The first generation of packaging technology is to conduct the current from the battery to the outside by using evaporated metal injectors and soldered metal strips, and sealing the edges of the metal strips, the device is located in the center of the closed cavity.
The second-generation packaging technology uses transparent indium tin oxide electrodes to separate the perovskite electrodes from the metal electrodes to ensure a certain lateral gap between the electrodes and the printed circuit board. One side of the package is directly the ITO electrode, which can better seal the entire device. Both are “edge banding” packaging techniques.
Packaging Materials
Polymeric materials used in packaging generally have excellent insulating properties, thermoplasticity and some mechanical strength. The dense packaging layer can effectively isolate water and oxygen in the air, and can realize large-area packaging at low cost. Common packaging materials include polyisobutylene, polyethylene, thermoplastic polyurethane, ethylene vinyl acetate, and cyclized perfluoropolymers.
“Blanket cover” packaging technology
“Blanket cover” packaging technology, that is, the entire device is wrapped with a polymer, so that the device is in intimate contact with the polymer, and there is no cavity inside. Interestingly, the authors covered the surface of the encapsulated cells with a cover glass, which can effectively prevent the overflow of CH3Br and NH3 generated by the decomposition of perovskite, but polymer encapsulation alone cannot achieve this effect. The polymer acts not only as a water vapor barrier but also as a strong adhesive between the perovskite solar cell and the cover glass, which further enhances the hermetic performance of the system.
Packaging Technology
Organic-inorganic hybrid perovskite solar cells exhibit excellent durability by using a simple and low-cost encapsulation technique using polyisobutylene or polyolefin-based polymer-glass combinations.
Notably, highly stable perovskite solar cells have always avoided the low thermal stability of methylammonium ions, but these cells were able to withstand the most severe freezing humidity tests. The polymer glass “blanket cover” packaging technology can realize the absolute sealing of the package, form a stable working environment, prevent the decomposition products from overflowing from the system, and greatly improve the service life of the perovskite solar cell. This work provides new ideas for designing more stable solar cells with perovskites, and greatly promotes the commercial application of solar cells in perovskites.
Ultrasonic spray technology has been proven successful for depositing thin film solar cell coatings of anti-reflection layers, TCO coatings, Buffer layer coatings, PEDOT, and active layers in thin film and perovskite solar cell manufacturing. Our coating solutions are environmentally-friendly, efficient and highly reliable, and enable dramatic reductions in overspray, savings in raw material, water and energy usage and provide improved process repeatability, transfer efficiency, high uniformity and reduced emissions.
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