On February 27, 2025, the "2024 Review and 2025 Outlook Seminar for the Photovoltaic Industry", hosted by the China Photovoltaic Industry Association (CPIA), successfully concluded in Beijing. As a VIP participant, HIUV presented its report "Market and Technical Analysis of Encapsulation Films," showcasing its commitment to optimizing N-type cell encapsulation.
According to data from relevant research institutions, by the end of 2025, the market share of N-type cells will rise from 70% in 2024 to 90%. Among them, TOPCon will further increase its penetration rate, from 60%-70% in 2024 to 80%; HJT will experience significant development acceleration in 2025 due to the maturation of mass production technology and reduced production costs, rising from 5%-10% in 2024 to 15%; BC cells, with clear advantages from both theoretical maximum efficiency and the best efficiency achieved in mass production, will see an upgrade from TOPCon and HJT to BC processes in the next three years. In 2025, their market share will also increase, from 1%-2% in 2024 to 2%-3%.
TOPCon – UVB Cutoff Film
As the mainstream TOPCon technology advances, the predominant encapsulation solution in the market is the use of low-acid, high-barrier encapsulant films to mitigate the impact of acetic acid released from EVA decomposition on the silver-aluminum paste of the cells.
However, beyond humidity and heat challenges, research data indicates that TOPCon modules are particularly sensitive to UVID. Ultraviolet radiation, with its short wavelength, high energy, and strong penetration capability, poses a significant threat to both solar cells and encapsulation materials. UVB cutoff film is designed to optimize light transmittance in key UV wavelength bands based on the cell’s sensitivity to UV exposure. This enhances module power output while maintaining low transmittance in the UV spectrum, effectively combating UVID. HIUV's UVB cutoff film exhibits power performance on par with high-transmittance films, compared to 380nm, 360nm, and 320nm cutoff films, HIUV's UVB cutoff film demonstrates a significant power output improvement.
HJT – Zero-Migration UV Light Conversion Film
The sensitivity of HJT solar cells to ultraviolet (UV) radiation has long been a key factor limiting their performance stability. Prolonged exposure to UV can lead to performance degradation in amorphous silicon layers, negatively impacting power generation efficiency and overall module lifespan. To address this challenge, the industry has adopted light-conversion encapsulant films to enhance HJT module UV resistance, achieving over 2% power gain compared to cutoff-type films while ensuring long-term weather resistance. However, conventional light-conversion films suffer from migration issues, which weaken cell protection, making them more vulnerable to external factors such as UV radiation, humidity, and temperature fluctuations, thereby accelerating module aging. Additionally, migration leads to inconsistent internal performance, increasing the risk of module failures and reducing its reliability and stability. HIUV has made significant breakthroughs in addressing these challenges. Its proprietary UV light-conversion agent forms a crosslinked macromolecular network with the base resin, offering superior anti-migration and anti-exudation properties compared to existing market solutions. Even under extreme conditions, including high temperatures and intense UV radiation, HIUV’s third-generation zero-migration UV light conversion film maintains exceptional light-conversion efficiency:Under 105°C for 96 hours of testing, conventional non-migration-resistant films exhibited 5-6 fingers with migration lengths of approximately 6-7mm, whereas HIUV’s third-generation zero-migration UV light conversion film showed absolutely no migration, demonstrating strong anti-migration properties. Additionally, in UV testing at a lamp intensity of 240W/m², HIUV’s third-generation zero-migration UV light conversion film achieved a quantum efficiency of nearly 57%, showcasing exceptional UV resistance. Furthermore, the film maintains an average transmittance of 17.69% in the 290-380nm UV range, ensuring excellent light transmission performance under damp-heat and UV aging conditions. Notably, HIUV's UV light-conversion agent is an independent innovation that bypasses international patent barriers, making HIUV the exclusive supplier of the third-generation zero-migration UV light conversion film, further reinforcing its leadership in the industry.
BC – UVB Cutoff Film
Due to its high technical complexity, BC (Back-Contact) cells currently hold a relatively small market share. At present, dual-glass modules typically use EPE + transparent/white EVA, while single-glass modules adopt EPE/POE + white EVA. Additionally, considering the potential advantages of UVB cutoff films in mitigating UVID, their application could be considered in the future to reduce BC cell degradatio.
As a technology leader in the photovoltaic encapsulation materials industry, HIUV continues to drive the upgrading of encapsulant films, leading the industry with exclusive third-generation zero-migration UV light conversion film and other cutting-edge products. Looking ahead, HIUV remains committed to optimizing its product offerings and customer service, delivering comprehensive and high-quality solutions to meet the evolving needs of its clients.