Abstract
Reflection is a fundamental optical phenomenon, which occurs when light propagates across a boundary between two media that have different refractive indices. Using layer systems consisting of thin films with thickness in the range of light wavelength, it is possible to reduce the reflected light to below 0.2% by destructive interference. For this application, silica films were prepared from the mixture of a polymerized tetraethoxysilane (TEOS) sol and a polymerized methyltriethoxysilane (MTES) sol. The surface morphology of the coatings could be controlled by changing the molar ratio of both precursors, and the hydrophobic methyl groups in the silica network caused micro-phase separation. The refractive index of the film with the porous morphology could be controlled by preparation conditions, such as the kind of solvents, the relative humidity of the atmosphere, and the heat treatment temperature. Low-reflective glasses with visible light reflectance of 0.2% could be obtained by applying the present porous silica films with a refractive index of 1.23 to a soda-lime-silica glass substrate.
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Yamazaki, S. (2018). Sol‐Gel-Prepared Antireflective Coatings. In: Klein, L., Aparicio, M., Jitianu, A. (eds) Handbook of Sol-Gel Science and Technology. Springer, Cham. https://doi.org/10.1007/978-3-319-32101-1_97
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DOI: https://doi.org/10.1007/978-3-319-32101-1_97
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