Dielectric UV filters for protection of fire-resistant glass based on intumescent layers

ABSTRACT: Structures such as OLEDs, perovskite solar cells, intumescent glasses, and other components in modern devices and buildings contain materials suscep-tible to degradation when exposed to UV radiation, requiring protection to with-stand outdoor environmental conditions. In this work, multilayer coating config-ured as a Bragg Reflector on glass is employed as spectral filtering to protect the intumescent component of fire-resistant glass from degradation due to prolonged UV solar radiation exposure. By alternating low-n (SiO2)/high-n (TiO2) dielectric layers through spin-coating, precise control over film thickness could be achieved, allowing the fabrication of thin (<700 nm) UV filters with high trans-mission of visible sunlight – 88% of the 780 to 380 nm wavelength range – while reflecting almost all the incident UV – 90% of the wavelength below 380nm. Using relatively simple techniques, high precision coating was successfully achieved, resulting in an effective UV radiation protective barrier applied to en-hance the durability of the components in fire-resistant glass.

Keywords

Materials Glasses UV filter Perovskite solar cells Fire resistant

URI

http://hdl.handle.net/10400.9/6119

Citation

Silva, R., Hashim, H., Roy, D., Fernandes, C. O., Oliveira, K., Pinheiro, X. L., Esteves, M. A., Capelo, A., Donato, M. T., Oliveira, F. A. C., Ferreira, C., Alves, I. N., Diamantino, T. C., Barreiros, M. A., Rocha, J., Teixeira, J. & Salomé, P. (2025). Dielectric UV filters for protection of fire-resistant glass based on intumescent layers. In: Proceedings for the CEES 2025 - 3rd International Conference on Con-struction, Energy, Environment and Sustainability, Bari, Italy, 11-13 June, 2025. ISBN: 978-989-54499-7-2