What is Photovoltaic Silver Paste?
Silver powder, organic solvent, and a binder are typically used to make photovoltaic silver paste. Photovoltaic silver paste is deposited or printed on the surface of the cell to form a metal electrode grid during the manufacturing process of solar cells.
Silver has strong electrical conductivity and can provide a good electron transport channel, assisting in the collection and conduction of electrons during the process of converting solar energy to electrical energy in PV cells. These silver paste conductive grids aid in gathering electricity and passing it to the cell's circuitry, enhancing cell efficiency.
What are the characteristics of photovoltaic silver paste?
1. Excellent conductivity: Because silver is a good conductive substance, photovoltaic silver paste has excellent conductivity, which helps to reduce resistance and thus increase the battery's current collecting efficiency.
2. Good adhesion: Photovoltaic silver paste can be firmly bonded to the surface of the silicon wafer to ensure the electrical connection's dependability.
3. Anti-aging qualities: With careful design, photovoltaic silver paste can be utilized throughout time to retain stable electrical properties that are not easily impacted by the environment.
Where is the Photovoltaic Silver Paste in the PV panel?
According to the location of the silver paste, photovoltaic silver paste is classified as silver paste on the front side of the solar panel and silver paste on the back side.
The primary function of silver paste on the front side is to collect and export photogenerated carriers, which are primarily utilized in P-type battery lit surfaces and N-type battery on both sides, which is the present market's major product.
The silver paste on the rear side primarily serves as an adhesion agent and is typically employed on the backlighting side of P-type cells.
As a result, the silver paste used on the front side of solar panels necessitates a greater level of manufacturing process and electrical conductivity.
According to the classification of sintering temperature, what are the types of photovoltaic silver paste?
According to the sintering temperature, photovoltaic silver paste is classified as high-temperature silver paste or low-temperature silver paste. The current market's major product is high-temperature silver paste, which is commonly used in BSF and PERC batteries. According to CPIA data, the present supply of high-temperature silver paste accounted for more than 98% of the overall supply of silver paste.
Maysun manufactures solar panels, which are quite popular with clients.
These are PERC solar panels placed on a German customer's roof, click the image to learn more.
In most HJT heterojunction batteries, low-temperature silver paste is used. As the market share of HJT heterojunction batteries grows, so will the demand for low-temperature silver paste.
Click here to learn more about HJT.
Is Photovoltaic Silver Paste expensive?
Photovoltaic silver paste is primarily made up of high-purity silver powder, glass powder, and organic raw ingredients, which are created through mixing, rolling pulp, and other procedures. The specific constituents of positive silver paste determine the succeeding links, which in turn affect the silver powder. The cost of silver powder accounts for more than 98% of the cost structure, but silver powder performance directly impacts the resistance of the electrode material, therefore influencing the photoelectric conversion efficiency. Vitreous as a bonding phase, at high temperatures to dissolve silver powder and rearrangement, the glass powder quality of the silver-silicon ohmic contact of the silver powder sintering machine is critical.
What is the future direction of photovoltaic silver paste development?
Irregular silver powder causes excessive surface energy, particle roughness, the creation of agglomerates, and the difficulty of uniformly distributing it into the medium, resulting in a highly porous sintered silver film with increased resistance. Spherical silver powder has a small specific surface area, better dispersion, printing with smoothness, and conductive film has a dense structure, so spherical silver powder is a silver paste production raw material used more, but the spherical silver powder is easy to form a point of contact, sintering after the sphere shrinkage, the increase in voids, and the impact of electrical conductivity, so the future direction of the research is for the different shapes of the silver powder mixture to strengthen the performance of the silver paste.
Since 2008, Maysun Solar has been producing high-quality solar panels. We have a large variety of products. Along with shingles, we provide all-black, double-glass, and other varieties of solar panels that employ technologies such as half-cut, MBB, and IBC. These solar panels offer exceptional performance and an attractive appearance, allowing them to blend in with any architecture. Maysun Solar has been able to establish offices and warehouses in a variety of nations, as well as long-term relationships with excellent installers. If you want the most recent module prices or have any other queries concerning PV, please contact us.
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