With the photovoltaic (PV) industry fully transitioning into the N-type era, TOPCon cells have rapidly emerged as the market mainstream due to their high conversion efficiency and low degradation characteristics. Their broad application potential in complex scenarios such as plateaus, deserts, and coastal regions has become evident. However, the hidden degradation risks posed by intense ultraviolet (UV) radiation have increasingly emerged as a critical factor affecting module stability and lifespan.
Research indicates that intense UV exposure can disrupt hydrogen bonds in the surface passivation layer of crystalline silicon PV cells, compromising the passivation effect of N-type cells and ultimately leading to efficiency losses and performance degradation. To address this challenge, DAS Solar, leveraging its profound understanding of cell structures and expertise in materials engineering, has developed a systematic and customizable UVID (UV-Induced Degradation) resistance solution. This solution spans cell structure optimization, encapsulation material innovation, and product adaptation, enhancing the long-term stability of N-type modules under high UV conditions from the source.
At the cell level, based on a deep understanding of the passivation mechanisms of N-type TOPCon cells, DAS Solar’s R&D team has optimized parameters such as the refractive index and thickness of the alumina and passivated silicon layers. Without sacrificing conversion efficiency, this optimization significantly enhances cell structural stability and UV resistance, laying a solid foundation for module UV resilience.
At the module level, DAS Solar has established a joint R&D mechanism with leading suppliers of PV encapsulation materials. By continuously refining the structure, composition, and selection of encapsulation materials, DAS Solar ensures that while maintaining excellent light transmittance, the overall UV resistance of both the encapsulation materials and modules is improved. By utilizing materials with light-conversion properties, short-wavelength UV light is transformed into harmless blue light, mitigating the impact of UV radiation on cells. Alternatively, encapsulation materials that effectively filter out ultra-short UV wavelengths are selected to minimize the intensity of short-wavelength UV light reaching the PV cells. Through multi-dimensional material combinations and precise selection, DAS Solar’s modules exhibit exceptional environmental adaptability throughout their lifecycle.
Leveraging an advanced PV laboratory platform, DAS Solar has established a comprehensive UVID reliability evaluation system encompassing material screening, accelerated aging tests, and mass production process monitoring. Additionally, tailored UVID solutions are provided to match project requirements in different application regions, such as high-altitude and high-UV load areas, ensuring stable module operation under extreme climatic conditions.
With its outstanding UV resistance performance and systematic reliability management, DAS Solar’s modules have been awarded the first TÜV Rheinland UVID certification. This not only provides robust assurance for DAS Solar modules’ application in extreme UV environments such as plateaus and the Middle East but also boosts customer confidence in investment and financing, project development, and long-term return assessments.
Against the backdrop of deepening integration trends like PV+Transportation, BIPV and Agro-PV, module stability and environmental adaptability have become core concerns. As a pioneer in green innovation technologies, DAS Solar will continue to iterate and upgrade its UVID solutions by focusing on material advancement, structural optimization, and system adaptation. This will facilitate the widespread application of N-type modules in complex scenarios characterized by high UV, high temperatures, and high altitudes, laying a foundation for “more durable, safer, and more stable” green energy solutions for global customers.
