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The large-area multi-functional high-efficiency antireflection film technology has received extensive attention in recent years. The photovoltaic technology research team of Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences has developed the first-generation porous silica and second-generation double-layer oxide anti-reflection coating technology for photovoltaic power generation glass. The problem that the above system still needs to be improved is that the film has an open pore structure that directly communicates with the air, and easily absorbs moisture and other impurities in the air, thereby causing deterioration of the optical performance.
Based on previous research, the relevant team aims to improve the optical properties, weather resistance, and mechanical properties of anti-reflection coatings. Through both theoretical calculations and experimental verifications, we explored ways to achieve new antireflection coatings.
Currently, the team is working on the third generation of nanometer wide-spectrum antireflection coatings with closed pores. The single-layer antireflection film has a spectrally weighted average transmittance of 97.34% at 300-1200 nm, which is close to the theoretical limit of 97.72%. This system also has a significant anti-fog effect. Based on this, a more complex multi-layer quasi-gradient photovoltaic power generation anti-reflection film was realized by a refractive index control technology (between 1.10-1.45), and at the same time, a further improvement was achieved in broad spectrum anti-reflection effects, achieving better results. Weather resistance. Some relevant research results were recently published on ACSAppl.Mater.Interfaces6,1415(2014) and J.Sol-gelSci.Technol.DOI:10.1007/s10971-014-3364-y, and have been authorized China's invention patent (CN20120097416). This progress has laid a solid foundation for further improving the broad spectrum, omnidirectional and long-term antireflection characteristics of antireflection coatings and their application in photovoltaic power generation and photovoltaic devices.
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